#C4C538
Closest named color: Mustard Yellow (#D2BD0A). oklch(79.8% 0.156 109.9), rgb(196, 197, 56).
Aa
Black text reads best on this color (11.39:1).
About this color
#C4C538 is a light, vivid yellow. In OKLCH its lightness is 80%, its chroma 0.156 and its hue 110°. Its hue sits on the warm side of the wheel. The nearest named color is Mustard Yellow (#D2BD0A), ΔE 0.026 away. Black text reads best on it, at 11.39:1.
| Hue family | Yellows |
| Lightness | light (80%) |
| Chroma | vivid (0.156) |
| Temperature | warm |
| Nearest name | Mustard Yellow (#D2BD0A) |
| Black text | 11.39:1 |
| White text | 1.84:1 |
Values
| HEX | #C4C538 |
| RGB | rgb(196, 197, 56) |
| HSL | hsl(60, 56%, 50%) |
| OKLCH | oklch(79.8% 0.156 109.9) |
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 #C4C538 | 1.84:1 | Fails | Lc -38.7 | Non-text elements, placeholder text |
| Black text on #C4C538 | 11.39:1 | AAA | Lc 69.4 | Content text, not long reading |
| #C4C538 text on white | 1.84:1 | Fails | Lc 34.5 | Non-text elements, placeholder text |
| #C4C538 text on black | 11.39:1 | AAA | Lc -68.1 | 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
#F6F7E7
oklch(97.1% 0.021 109.7)
-
Step 100
100
#EBEDCB
oklch(93.6% 0.045 110)
-
Step 200
200
#DCDF9C
oklch(88.6% 0.087 110.2)
-
Step 300
300 (this color)
#C4C538
oklch(79.8% 0.156 109.9)
-
Step 400
400
#A7A800
oklch(70.7% 0.155 110.2)
-
Step 500
500
#8F9000
oklch(63.2% 0.138 110.3)
-
Step 600
600
#787900
oklch(55.7% 0.122 110.4)
-
Step 700
700
#656500
oklch(49.1% 0.107 109.8)
-
Step 800
800
#535300
oklch(42.8% 0.093 109.8)
-
Step 900
900
#454500
oklch(37.8% 0.082 109.8)
-
Step 950
950
#282900
oklch(27.1% 0.06 111.2)
#C4C538 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) | #D5BD1D | 0.029 |
| Deuteranopia (no green cones) | #D6C143 | 0.030 |
| Tritanopia (no blue cones) | #D2B9AA | 0.140 |
| Achromatopsia (no color) | #BFBFBF | 0.156 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #C4C538
#C4C538
oklch(79.8% 0.156 109.9)
- #BCB1FF
#BCB1FF
oklch(79.8% 0.11 290.1)
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 #C4C538, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Mustard Yellow #D2BD0A ΔE 0.026
- Olive Yellow #C2B709 ΔE 0.037
- Dark Yellow #D5B60A ΔE 0.041
- Mustard #CEB301 ΔE 0.045
- Pea #A4BF20 ΔE 0.051
- Greenish Tan #BCCB7A ΔE 0.054
- Light Olive Green #A4BE5C ΔE 0.055
- Light Olive #ACBF69 ΔE 0.055
Use #C4C538 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.