#C9C428
Closest named color: Mustard Yellow (#D2BD0A). oklch(79.9% 0.162 107.6), rgb(201, 196, 40).
Aa
Black text reads best on this color (11.41:1).
About this color
#C9C428 is a light, vivid yellow. In OKLCH its lightness is 80%, its chroma 0.162 and its hue 108°. Its hue sits on the warm side of the wheel. The nearest named color is Mustard Yellow (#D2BD0A), ΔE 0.020 away. Black text reads best on it, at 11.41:1.
| Hue family | Yellows |
| Lightness | light (80%) |
| Chroma | vivid (0.162) |
| Temperature | warm |
| Nearest name | Mustard Yellow (#D2BD0A) |
| Black text | 11.41:1 |
| White text | 1.84:1 |
Values
| HEX | #C9C428 |
| RGB | rgb(201, 196, 40) |
| HSL | hsl(58, 67%, 47%) |
| OKLCH | oklch(79.9% 0.162 107.6) |
Contrast
WCAG 2 contrast ratios are the conformance target: AA needs 4.5:1 for body text and 3:1 for large text, AAA needs 7:1. APCA Lc values are supplementary guidance from the WCAG 3 drafts.
| Pair | WCAG 2 | Result | APCA | APCA guidance |
|---|---|---|---|---|
| White text on #C9C428 | 1.84:1 | Fails | Lc -38.5 | Non-text elements, placeholder text |
| Black text on #C9C428 | 11.41:1 | AAA | Lc 69.5 | Content text, not long reading |
| #C9C428 text on white | 1.84:1 | Fails | Lc 34.4 | Non-text elements, placeholder text |
| #C9C428 text on black | 11.41:1 | AAA | Lc -68.2 | Content text, not long reading |
Tints and shades
A 50–950 scale built in OKLCH: the hue is held, lightness follows a Tailwind v4-like curve, and every step is kept inside the sRGB gamut. This color sits at step 300.
-
Step 50
50
#F7F7E6
oklch(97.2% 0.022 106.8)
-
Step 100
100
#EDEDC9
oklch(93.7% 0.047 107.3)
-
Step 200
200
#DFDE98
oklch(88.5% 0.09 107.4)
-
Step 300
300 (this color)
#C9C428
oklch(79.9% 0.162 107.6)
-
Step 400
400
#ABA600
oklch(70.6% 0.152 107.6)
-
Step 500
500
#938E00
oklch(63.1% 0.135 107.2)
-
Step 600
600
#7B7700
oklch(55.5% 0.119 107.4)
-
Step 700
700
#676400
oklch(49% 0.105 107.7)
-
Step 800
800
#555200
oklch(42.8% 0.092 107.3)
-
Step 900
900
#464400
oklch(37.6% 0.081 107.8)
-
Step 950
950
#2A2800
oklch(27% 0.058 106.8)
#C9C428 with color blindness
Simulated with the Machado et al. (2009) model. ΔE is how far the color moves: below about 0.02 you would not notice a change.
| Vision | Seen as | Shift (ΔE) |
|---|---|---|
| Protanopia (no red cones) | #D5BC00 | 0.024 |
| Deuteranopia (no green cones) | #D8C136 | 0.026 |
| Tritanopia (no blue cones) | #D8B7A8 | 0.147 |
| Achromatopsia (no color) | #BFBFBF | 0.162 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #C9C428
#C9C428
oklch(79.9% 0.162 107.6)
- #B9B3FF
#B9B3FF
oklch(79.9% 0.107 287.3)
Analogous
Neighbouring hues, 30° either side.
Split complementary
The two hues beside the complement (150° and 210°).
Triadic
Three hues spaced 120° apart.
Palettes with this color
Curated palettes that contain a color within ΔE 0.04 (OKLab) of #C9C428, closest first.
No curated palette has a color within ΔE 0.04 of #C9C428.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Mustard Yellow #D2BD0A ΔE 0.020
- Olive Yellow #C2B709 ΔE 0.036
- Dark Yellow #D5B60A ΔE 0.037
- Mustard #CEB301 ΔE 0.042
- Pea #A4BF20 ΔE 0.055
- Greenish Tan #BCCB7A ΔE 0.062
- Light Olive Green #A4BE5C ΔE 0.062
- Yellow Green #9ACD32 ΔE 0.063
Use #C9C428 in your product
Turn it into light and dark UI roles checked for contrast, then export to Tailwind v4, shadcn/ui, CSS or design tokens.