OKLCH Studio · shadcn/ui accent theme
shadcn/ui Yellow theme colors: primary oklch(0.852 0.199 91.936) & chart tokens
shadcn/ui Yellow: primary #fdc700 light / #f0b100 dark (oklch(0.852 0.199 91.936)). 19 of 22 checked pairs meet WCAG AA 4.5:1 (light 9/11, dark 10/11). Copy the accent overrides on the neutral base as OKLCH, @theme mapping or hex.
Yellow is an accent theme: it overrides primary, secondary, the chart colours and sidebar-primary, and sits on top of a base colour. Every other value below comes from the neutral base (shadcn's default), and the contrast audit uses that combination. Source: shadcn/ui (MIT, © 2023 shadcn); all themes.
Preview
Card title
Muted description text on the card.
PrimarySecondaryAccentDestructive
Muted block with input border
Card title
Muted description text on the card.
PrimarySecondaryAccentDestructive
Muted block with input border
light mode tokens
| Token | Swatch | oklch() | Hex | In sRGB |
|---|---|---|---|---|
| --background | oklch(1 0 0) | #ffffff | Yes | |
| --foreground | oklch(0.145 0 0) | #0a0a0a | Yes | |
| --card | oklch(1 0 0) | #ffffff | Yes | |
| --card-foreground | oklch(0.145 0 0) | #0a0a0a | Yes | |
| --popover | oklch(1 0 0) | #ffffff | Yes | |
| --popover-foreground | oklch(0.145 0 0) | #0a0a0a | Yes | |
| --primaryyellow | oklch(0.852 0.199 91.936) | #fdc700 | No — hex is clipped | |
| --primary-foregroundyellow | oklch(0.421 0.095 57.708) | #733e0a | Yes | |
| --secondaryyellow | oklch(0.967 0.001 286.375) | #f4f4f5 | Yes | |
| --secondary-foregroundyellow | oklch(0.21 0.006 285.885) | #18181b | Yes | |
| --muted | oklch(0.97 0 0) | #f5f5f5 | Yes | |
| --muted-foreground | oklch(0.556 0 0) | #737373 | Yes | |
| --accent | oklch(0.97 0 0) | #f5f5f5 | Yes | |
| --accent-foreground | oklch(0.205 0 0) | #171717 | Yes | |
| --destructive | oklch(0.577 0.245 27.325) | #e7000b | No — hex is clipped | |
| --border | oklch(0.922 0 0) | #e5e5e5 | Yes | |
| --input | oklch(0.922 0 0) | #e5e5e5 | Yes | |
| --ring | oklch(0.708 0 0) | #a1a1a1 | Yes | |
| --chart-1yellow | oklch(0.905 0.182 98.111) | #ffdf20 | No — hex is clipped | |
| --chart-2yellow | oklch(0.795 0.184 86.047) | #f0b100 | No — hex is clipped | |
| --chart-3yellow | oklch(0.681 0.162 75.834) | #d08700 | No — hex is clipped | |
| --chart-4yellow | oklch(0.554 0.135 66.442) | #a65f00 | No — hex is clipped | |
| --chart-5yellow | oklch(0.476 0.114 61.907) | #894b00 | No — hex is clipped | |
| --sidebar | oklch(0.985 0 0) | #fafafa | Yes | |
| --sidebar-foreground | oklch(0.145 0 0) | #0a0a0a | Yes | |
| --sidebar-primaryyellow | oklch(0.681 0.162 75.834) | #d08700 | No — hex is clipped | |
| --sidebar-primary-foregroundyellow | oklch(0.987 0.026 102.212) | #fefce8 | Yes | |
| --sidebar-accent | oklch(0.97 0 0) | #f5f5f5 | Yes | |
| --sidebar-accent-foreground | oklch(0.205 0 0) | #171717 | Yes | |
| --sidebar-border | oklch(0.922 0 0) | #e5e5e5 | Yes | |
| --sidebar-ring | oklch(0.708 0 0) | #a1a1a1 | Yes |
dark mode tokens
| Token | Swatch | oklch() | Hex | In sRGB |
|---|---|---|---|---|
| --background | oklch(0.145 0 0) | #0a0a0a | Yes | |
| --foreground | oklch(0.985 0 0) | #fafafa | Yes | |
| --card | oklch(0.205 0 0) | #171717 | Yes | |
| --card-foreground | oklch(0.985 0 0) | #fafafa | Yes | |
| --popover | oklch(0.205 0 0) | #171717 | Yes | |
| --popover-foreground | oklch(0.985 0 0) | #fafafa | Yes | |
| --primaryyellow | oklch(0.795 0.184 86.047) | #f0b100 | No — hex is clipped | |
| --primary-foregroundyellow | oklch(0.421 0.095 57.708) | #733e0a | Yes | |
| --secondaryyellow | oklch(0.274 0.006 286.033) | #27272a | Yes | |
| --secondary-foregroundyellow | oklch(0.985 0 0) | #fafafa | Yes | |
| --muted | oklch(0.269 0 0) | #262626 | Yes | |
| --muted-foreground | oklch(0.708 0 0) | #a1a1a1 | Yes | |
| --accent | oklch(0.269 0 0) | #262626 | Yes | |
| --accent-foreground | oklch(0.985 0 0) | #fafafa | Yes | |
| --destructive | oklch(0.704 0.191 22.216) | #ff6467 | No — hex is clipped | |
| --border | oklch(1 0 0 / 10%) | #ffffff (10% alpha) | Yes | |
| --input | oklch(1 0 0 / 15%) | #ffffff (15% alpha) | Yes | |
| --ring | oklch(0.556 0 0) | #737373 | Yes | |
| --chart-1yellow | oklch(0.905 0.182 98.111) | #ffdf20 | No — hex is clipped | |
| --chart-2yellow | oklch(0.795 0.184 86.047) | #f0b100 | No — hex is clipped | |
| --chart-3yellow | oklch(0.681 0.162 75.834) | #d08700 | No — hex is clipped | |
| --chart-4yellow | oklch(0.554 0.135 66.442) | #a65f00 | No — hex is clipped | |
| --chart-5yellow | oklch(0.476 0.114 61.907) | #894b00 | No — hex is clipped | |
| --sidebar | oklch(0.205 0 0) | #171717 | Yes | |
| --sidebar-foreground | oklch(0.985 0 0) | #fafafa | Yes | |
| --sidebar-primaryyellow | oklch(0.795 0.184 86.047) | #f0b100 | No — hex is clipped | |
| --sidebar-primary-foregroundyellow | oklch(0.987 0.026 102.212) | #fefce8 | Yes | |
| --sidebar-accent | oklch(0.269 0 0) | #262626 | Yes | |
| --sidebar-accent-foreground | oklch(0.985 0 0) | #fafafa | Yes | |
| --sidebar-border | oklch(1 0 0 / 10%) | #ffffff (10% alpha) | Yes | |
| --sidebar-ring | oklch(0.556 0 0) | #737373 | Yes |
Contrast audit (WCAG 2)
19 of 22 checked pairs meet AA 4.5:1. Pairs with a translucent side are skipped. A suggested fix keeps hue and chroma and moves the foreground's lightness to the nearest AA value, using the same logic as the contrast checker.
| Pair | Ratio | APCA Lc | AA 4.5 | AA large 3 | Fix / details |
|---|---|---|---|---|---|
| foreground on background#0a0a0a on #ffffff | 19.79:1 | 106 | Pass | Pass | Pair page → |
| card-foreground on card#0a0a0a on #ffffff | 19.79:1 | 106 | Pass | Pass | Pair page → |
| popover-foreground on popover#0a0a0a on #ffffff | 19.79:1 | 106 | Pass | Pass | Pair page → |
| primary-foreground on primary#733e0a on #fdc700 | 5.50:1 | 61 | Pass | Pass | |
| secondary-foreground on secondary#18181b on #f4f4f5 | 16.11:1 | 98 | Pass | Pass | |
| muted-foreground on muted#737373 on #f5f5f5 | 4.34:1 | 67 | Fail | Pass | Set muted-foreground to oklch(0.516 0.000 0.0) (#676767, 5.18:1). |
| muted-foreground on background#737373 on #ffffff | 4.74:1 | 73 | Pass | Pass | Pair page → |
| accent-foreground on accent#171717 on #f5f5f5 | 16.44:1 | 99 | Pass | Pass | |
| destructive on background#e7000b on #ffffff | 4.76:1 | 70 | Pass | Pass | Pair page → |
| sidebar-foreground on sidebar#0a0a0a on #fafafa | 18.96:1 | 103 | Pass | Pass | |
| sidebar-primary-foreground on sidebar-primary#fefce8 on #d08700 | 2.84:1 | -58 | Fail | Fail | Set sidebar-primary-foreground to oklch(0.307 0.026 102.2) (#323021, 4.52:1). |
| Pair | Ratio | APCA Lc | AA 4.5 | AA large 3 | Fix / details |
|---|---|---|---|---|---|
| foreground on background#fafafa on #0a0a0a | 18.96:1 | -104 | Pass | Pass | |
| card-foreground on card#fafafa on #171717 | 17.17:1 | -104 | Pass | Pass | |
| popover-foreground on popover#fafafa on #171717 | 17.17:1 | -104 | Pass | Pass | |
| primary-foreground on primary#733e0a on #f0b100 | 4.53:1 | 51 | Pass | Pass | |
| secondary-foreground on secondary#fafafa on #27272a | 14.27:1 | -101 | Pass | Pass | |
| muted-foreground on muted#a1a1a1 on #262626 | 5.85:1 | -48 | Pass | Pass | |
| muted-foreground on background#a1a1a1 on #0a0a0a | 7.66:1 | -51 | Pass | Pass | |
| accent-foreground on accent#fafafa on #262626 | 14.49:1 | -101 | Pass | Pass | |
| destructive on background#ff6467 on #0a0a0a | 6.85:1 | -47 | Pass | Pass | |
| sidebar-foreground on sidebar#fafafa on #171717 | 17.17:1 | -104 | Pass | Pass | |
| sidebar-primary-foreground on sidebar-primary#fefce8 on #f0b100 | 1.84:1 | -38 | Fail | Fail | Set sidebar-primary-foreground to oklch(0.387 0.026 102.2) (#474535, 5.06:1). |
Copy code
These are only the variables the Yellow accent theme overrides. Add them after a base colour's variables in your globals.css.
shadcn/ui v4 globals.css (OKLCH)
:root {
--primary: oklch(0.852 0.199 91.936);
--primary-foreground: oklch(0.421 0.095 57.708);
--secondary: oklch(0.967 0.001 286.375);
--secondary-foreground: oklch(0.21 0.006 285.885);
--chart-1: oklch(0.905 0.182 98.111);
--chart-2: oklch(0.795 0.184 86.047);
--chart-3: oklch(0.681 0.162 75.834);
--chart-4: oklch(0.554 0.135 66.442);
--chart-5: oklch(0.476 0.114 61.907);
--sidebar-primary: oklch(0.681 0.162 75.834);
--sidebar-primary-foreground: oklch(0.987 0.026 102.212);
}
.dark {
--primary: oklch(0.795 0.184 86.047);
--primary-foreground: oklch(0.421 0.095 57.708);
--secondary: oklch(0.274 0.006 286.033);
--secondary-foreground: oklch(0.985 0 0);
--chart-1: oklch(0.905 0.182 98.111);
--chart-2: oklch(0.795 0.184 86.047);
--chart-3: oklch(0.681 0.162 75.834);
--chart-4: oklch(0.554 0.135 66.442);
--chart-5: oklch(0.476 0.114 61.907);
--sidebar-primary: oklch(0.795 0.184 86.047);
--sidebar-primary-foreground: oklch(0.987 0.026 102.212);
}Tailwind v4 @theme inline mapping
@theme inline {
--color-primary: var(--primary);
--color-primary-foreground: var(--primary-foreground);
--color-secondary: var(--secondary);
--color-secondary-foreground: var(--secondary-foreground);
--color-chart-1: var(--chart-1);
--color-chart-2: var(--chart-2);
--color-chart-3: var(--chart-3);
--color-chart-4: var(--chart-4);
--color-chart-5: var(--chart-5);
--color-sidebar-primary: var(--sidebar-primary);
--color-sidebar-primary-foreground: var(--sidebar-primary-foreground);
}Hex fallback (for tools without OKLCH support)
:root {
--primary: #fdc700;
--primary-foreground: #733e0a;
--secondary: #f4f4f5;
--secondary-foreground: #18181b;
--chart-1: #ffdf20;
--chart-2: #f0b100;
--chart-3: #d08700;
--chart-4: #a65f00;
--chart-5: #894b00;
--sidebar-primary: #d08700;
--sidebar-primary-foreground: #fefce8;
}
.dark {
--primary: #f0b100;
--primary-foreground: #733e0a;
--secondary: #27272a;
--secondary-foreground: #fafafa;
--chart-1: #ffdf20;
--chart-2: #f0b100;
--chart-3: #d08700;
--chart-4: #a65f00;
--chart-5: #894b00;
--sidebar-primary: #f0b100;
--sidebar-primary-foreground: #fefce8;
}Related colours
Light primary: oklch(0.852 0.199 91.936) · #fdc700