Best for
Design-system engineers and front-end developers who need a visual OKLCH picker that outputs CSS-ready values instead of hex
Stack
A ready-made OKLCH Color Picker UI you can fork, run, and customize with the prompt pack below.
What's actually inside
The honest engineer's breakdown — what the OKLCH Color Pickertemplate does, how it's wired, and where it's opinionated.
The OKLCH Color Picker is a single-page Next.js app that treats OKLCH as a first-class color space rather than a conversion curiosity. The three OKLCHSliders — Lightness (0–1), Chroma (0–0.4), and Hue (0–360) — drive everything in real time. The ColorPreviewSwatch updates instantly and shows a copy-to-clipboard button for the CSS oklch(L C H) string, making it practical for dropping values straight into a stylesheet. The HexConverter uses the culori library to handle the OKLCH → sRGB gamut mapping correctly, which matters because naïve conversion libraries silently clip out-of-gamut colors without warning.
The PaletteGenerator is the template's most useful feature for production work: it pins Chroma and Hue to your chosen values and sweeps Lightness across 9 steps, outputting a Tailwind-compatible CSS custom property block you can paste directly into globals.css. The GamutWarningBadge flags when the selected color sits outside the sRGB triangle — important when you're designing for a mix of wide-gamut and standard displays. A ContrastChecker rounds out the tool with APCA contrast scoring against a configurable background color.
One honest caveat: the template is fully stateless. Generated palettes are not saved anywhere — close the tab and they're gone. The advanced Supabase prompt in this guide fixes that, but out of the box it's a session-only tool. Also, the react-colorful 2D picker is listed as optional in the brief, so the forked version may or may not include it depending on which community version you land on — check the Preview tab first.
Key UI components
OKLCHSlidersThree precision sliders (L/C/H) with numeric inputs for exact value entry
ColorPreviewSwatchLarge live preview rectangle with one-click copy of the CSS oklch() string
HexConverterConverts OKLCH to HEX/RGB/HSL in real time using culori's gamut-mapped sRGB output
PaletteGeneratorAuto-generates a 9-shade tonal palette and outputs Tailwind CSS custom properties
GamutWarningBadgeAlerts when the selected color exceeds sRGB gamut boundaries
ContrastCheckerCalculates APCA contrast between the selected color and a configurable background
Libraries it leans on
culoriHandles OKLCH → sRGB gamut mapping and multi-space color conversion accurately
shadcn/uiSlider, Input, Badge, Button, Tooltip, Card components for the controls UI
react-colorfulOptional 2D hue-chroma picker as an alternative input mode alongside the sliders
Fork it and get it running
The template is fully client-side — no env vars, no backend, no sign-in required. You can go from zero to a live Vercel URL in under five minutes.
Open the template and fork it
Go to https://v0.dev/chat/community/pYVLlced3as in your browser. In the top-right corner of the chat view, click the 'Fork' button. V0 will copy the entire template into a new chat in your workspace. You need to be signed in to v0.dev — a free account works.
Tip: If the button says 'Remix' instead of 'Fork', it's the same action.
You should see: A new V0 chat opens with all template code loaded and editable.
Verify the sliders and preview work
Open the Preview tab in the V0 editor. Move the OKLCHSliders for Lightness, Chroma, and Hue. The ColorPreviewSwatch should update in real time and the HexConverter should show corresponding HEX/RGB values. Click the copy button on the swatch to confirm clipboard access works in the preview.
Tip: If the sliders render but the swatch stays black, see the gotcha about uninitialized slider state below.
You should see: Sliders drive a live color preview and the copy button works.
Skip the Vars panel — no env vars needed
This template is 100% client-side. There are no API calls, no authentication, and no environment variables required to get it running. You can skip the Vars panel entirely for the basic fork. If you plan to add Supabase palette persistence later, you'll add NEXT_PUBLIC_SUPABASE_URL and NEXT_PUBLIC_SUPABASE_ANON_KEY at that point.
You should see: Template runs without any env var configuration.
Test the PaletteGenerator and copy the CSS output
In the Preview tab, adjust the OKLCHSliders to a color you want to build a palette around, then look for the PaletteGenerator section. It should display 9 shades of your chosen hue. Copy the CSS custom property block (--color-*: oklch(...)) and paste it into a test stylesheet to confirm the output is syntactically correct Tailwind v4 format.
Tip: Tailwind v4 uses the @theme block with --color-* variables. If your project uses Tailwind v3, use the extend.colors prompt from the pack below.
You should see: PaletteGenerator outputs a 9-shade CSS block you can paste directly into globals.css.
Publish to production
Click the Share button (top-right of the V0 editor), then open the Publish tab and click 'Publish to Production'. Vercel will build and deploy the app in 30–60 seconds. You'll receive a live *.vercel.app URL you can share with your design team immediately.
You should see: A live Vercel URL serves the OKLCH picker publicly.
Embed in your design system docs (optional)
Open the Git panel in V0 and click Connect. Enter a new repo name and V0 will create a branch named v0/main-{hash} with the code. Open the pull request in GitHub and merge it to main. You can then import the OKLCHSliders and ColorPreviewSwatch components directly into an existing Next.js project or Storybook-based docs site.
Tip: The tool pairs especially well with Tailwind CSS v4's native OKLCH color system.
You should see: Code is version-controlled in GitHub and available for further editing in Cursor or locally.
The prompt pack
Copy-paste these straight into v0's chat to customize the OKLCH Color Pickertemplate. Each one names this template's own components — no generic filler.
Add one-click copy for the full Tailwind v4 CSS custom property block
Turns the PaletteGenerator output into a one-click paste-ready Tailwind v4 CSS block, eliminating manual copying of each shade.
Add a 'Copy CSS' button directly below the PaletteGenerator palette preview. When clicked, it should copy all 9 shade values as a formatted --color-{name}-{shade}: oklch(L C H); block to the clipboard. Show a checkmark icon for 2 seconds after copying using local component state, then revert to the copy icon. The button should be styled as a shadcn Button with variant='outline'.Add a color name input for the PaletteGenerator
Makes the PaletteGenerator output directly usable in a real design system by letting you name the palette variable.
Add a text input above the PaletteGenerator palette preview that accepts a color name (e.g., 'brand' or 'primary'). Use this name as the key in the generated CSS custom property block so the output reads --color-brand-50, --color-brand-100... --color-brand-900 instead of generic variable names. The input should use the shadcn Input component and default to 'primary'.
Add side-by-side OKLCH vs sRGB gamut comparison in ColorPreviewSwatch
Gives design-system engineers a direct visual comparison of what color they specified versus what sRGB screens will actually render.
Modify ColorPreviewSwatch to show a split swatch: the left half displays the raw OKLCH color, the right half displays culori's toGamut('srgb') clamped version. When GamutWarningBadge is active, add a visible divider and label ('Original OKLCH' / 'sRGB clamped') so users can see the perceptual difference. If the two halves are identical, show only a single unified swatch.Export the full palette as Figma Tokens JSON
Lets design-system engineers export their OKLCH palette directly into a Figma Tokens plugin format, bridging the tool and Figma design workflow.
Add an 'Export for Figma' button in the PaletteGenerator section. When clicked, format the 9-shade palette as a Figma Tokens JSON structure: {"color":{"brand":{"50":{"value":"oklch(...)","type":"color"},...}}}. Use the color name from the name input field for the key. Trigger a JSON file download with the filename {colorName}-tokens.json using a Blob and a temporary anchor element.Integrate Supabase to save and share named color palettes
Converts the stateless picker into a persistent palette library where teams can save, name, and share OKLCH palettes via URL.
Add a Supabase client using NEXT_PUBLIC_SUPABASE_URL and NEXT_PUBLIC_SUPABASE_ANON_KEY. Create a color_palettes table with columns (id uuid, name text, l numeric, c numeric, h numeric, palette_json jsonb, created_at timestamptz) with a public read RLS policy and an authenticated insert policy. Add a 'Save Palette' button below the PaletteGenerator that inserts the current OKLCHSliders values and palette JSON. Create a /palette/[id] route that loads and displays a saved palette with a copy-shareable-URL button in the ColorPreviewSwatch area.
Gotchas when you extend it
The failures people actually hit when they push this template past its defaults — and the exact fix for each.
Colors outside P3 gamut display incorrectly in sRGB browsers (color appears wrong, not what the swatch shows)Why: A Chroma value above roughly 0.2 for mid-range hues exceeds sRGB. In non-wide-gamut displays the browser silently clips the color, so the rendered background-color differs from the OKLCH value the ColorPreviewSwatch reports.
Fix: Use culori's toGamut('srgb') function before setting any CSS background-color property. Trigger GamutWarningBadge when the toGamut output differs from the input L value by more than 0.01.
Use culori's toGamut('srgb') on the OKLCH value before setting CSS background-color in ColorPreviewSwatch, and show the GamutWarningBadge when the output differs from the inputOKLCHSliders jump to zero on first render, preview swatch shows blackWhy: If the slider initial value is read from undefined state, shadcn's Slider component defaults to 0 for all three axes, which produces black (L=0, C=0, H=0) in the ColorPreviewSwatch and looks like a broken component.
Fix: Initialize all three OKLCH values in useState with explicit non-zero defaults: L: 0.6, C: 0.15, H: 250. Never leave them undefined — the Slider component does not have a safe undefined fallback.
Add explicit default values to the OKLCHSliders useState initialization: L=0.6, C=0.15, H=250
The component at https://ui.shadcn.com/r/styles/new-york-v4/color-picker.json was not foundWhy: V0 sometimes generates a reference to a shadcn color-picker component that does not exist in the registry. This causes a build-time error when the import cannot be resolved.
Fix: Remove the missing import and replace it with react-colorful's HexColorPicker, which is already in the template's dependency list.
Replace any missing shadcn color-picker import with react-colorful HexColorPicker in the component that references it
Tailwind v4 CSS output from PaletteGenerator has wrong syntax when project uses Tailwind v3Why: Tailwind v4 uses the @theme block with --color-* CSS custom properties, while v3 uses extend.colors object syntax in tailwind.config.js. If the project's package.json has tailwindcss v3, pasting v4 output breaks the config.
Fix: Check the tailwindcss version in package.json. For v3 projects, add a toggle in PaletteGenerator that switches output between the v4 @theme format and the v3 extend.colors object format.
Add a Tailwind version toggle (v3 / v4) to the PaletteGenerator output panel: v4 outputs --color-* custom properties in @theme format, v3 outputs an extend.colors JS object
Template vs. custom — the honest call
A forked template gets you far, fast. Here's where it holds up, and where you'll outgrow it.
The template is enough when
- Your team uses OKLCH in your design system and needs a quick reference picker to share with designers
- You are building a Tailwind CSS v4 config and need to visualize and test OKLCH values before committing
- You want to check APCA contrast ratios in OKLCH color space without a separate tool
- You're documenting color tokens and want a shareable live URL for each palette
Go custom when
- You need full P3/Rec2020 color management across your production app with ICC profile handling
- You need the picker embedded in a drag-and-drop design tool with canvas layers and object selection
- You need integration with a proprietary design token pipeline (Style Dictionary, Theo, etc.)
- You need multi-user palette collaboration with change history and approval workflows
RapidDev can embed this OKLCH picker in your existing design system documentation site or extend it with database-backed palette libraries — reach out for a build estimate.
Frequently asked questions
Is the OKLCH Color Picker template free to use?
Yes. All v0.dev community templates are free to fork and use. You need a free v0.dev account to fork the template. There are no licensing fees for the template itself.
Can I use this template commercially?
Yes. V0 community templates use permissive licensing. You can fork this template, modify it, and deploy it as part of a commercial product or client project without attribution requirements. Always verify the license of any third-party libraries included (culori, react-colorful, shadcn/ui are all MIT).
Why does my forked template break in the V0 Preview but work after deploy?
The V0 Preview sandbox runs in a browser-based environment (esm.sh module resolution) that can behave differently from a deployed Node.js Vercel environment. If culori or react-colorful fail to resolve in Preview, click 'Publish to Production' — the deployed version almost always works correctly. This is a known V0 Preview limitation, not a code bug.
Do I need a database or backend to use this template?
No. The template is 100% client-side. OKLCH conversion, palette generation, contrast checking, and clipboard copy all run in the browser with no API calls. If you want to save palettes permanently or generate shareable links, the advanced Supabase prompt in the pack above adds that in one step.
What is OKLCH and why should I use it instead of hex?
OKLCH is a perceptually uniform color space where changing Lightness, Chroma, or Hue values feels predictable — unlike HSL where a small hue change can drastically shift perceived brightness. Tailwind CSS v4 and modern browsers support OKLCH natively via the oklch() CSS function, making it the best choice for design systems that need consistent, accessible color scales.
The GamutWarningBadge always shows even for normal colors — why?
High Chroma values (above ~0.2 for most hues) can exceed the sRGB gamut, triggering the warning. Start with C values between 0.1–0.18 for colors that render correctly on all displays. The culori gamut-mapping function will show you the closest sRGB equivalent so you can compare what you lose.
Can RapidDev customize this template for my design system?
Yes. RapidDev can embed the OKLCH picker into your existing documentation site, add database-backed palette libraries, or integrate it with your Figma Tokens pipeline. Reach out for a scoping call.
How do I get the palette output to work with Tailwind CSS v3?
The PaletteGenerator defaults to Tailwind v4 CSS custom property format (@theme block with --color-* variables). For Tailwind v3, you need an extend.colors object in tailwind.config.js instead. Use the Tailwind v3/v4 toggle prompt from the pack above to add a format switcher to PaletteGenerator.
Outgrowing the template?
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