#C5B100
Closest named color: Mustard (#CEB301). oklch(75.4% 0.157 101.2), rgb(197, 177, 0).
Aa
Black text reads best on this color (9.66:1).
About this color
#C5B100 is a medium-light, vivid yellow. In OKLCH its lightness is 75%, its chroma 0.157 and its hue 101°. Its hue sits on the warm side of the wheel. The nearest named color is Mustard (#CEB301), ΔE 0.015 away. Black text reads best on it, at 9.66:1.
| Hue family | Yellows |
| Lightness | medium-light (75%) |
| Chroma | vivid (0.157) |
| Temperature | warm |
| Nearest name | Mustard (#CEB301) |
| Black text | 9.66:1 |
| White text | 2.17:1 |
Values
| HEX | #C5B100 |
| RGB | rgb(197, 177, 0) |
| HSL | hsl(54, 100%, 39%) |
| OKLCH | oklch(75.4% 0.157 101.2) |
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 #C5B100 | 2.17:1 | Fails | Lc -47.2 | Large or bold text, headings |
| Black text on #C5B100 | 9.66:1 | AAA | Lc 61.4 | Content text, not long reading |
| #C5B100 text on white | 2.17:1 | Fails | Lc 42.5 | Non-text elements, placeholder text |
| #C5B100 text on black | 9.66:1 | AAA | Lc -59.7 | Large or bold text, headings |
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 400.
-
Step 50
50
#F7F6EC
oklch(97.1% 0.013 102)
-
Step 100
100
#EDEBD5
oklch(93.6% 0.029 102.7)
-
Step 200
200
#E0DBB2
oklch(88.5% 0.054 101.7)
-
Step 300
300
#CEC376
oklch(80.9% 0.099 101.2)
-
Step 400
400 (this color)
#C5B100
oklch(75.4% 0.157 101.2)
-
Step 500
500
#9B8B00
oklch(63.1% 0.132 101.2)
-
Step 600
600
#827400
oklch(55.5% 0.116 101)
-
Step 700
700
#6D6200
oklch(49.1% 0.103 101.8)
-
Step 800
800
#5A5000
oklch(42.8% 0.089 101.1)
-
Step 900
900
#4B4200
oklch(37.7% 0.078 100.6)
-
Step 950
950
#2C2700
oklch(27% 0.057 102.1)
#C5B100 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) | #C3AB00 | 0.016 |
| Deuteranopia (no green cones) | #C9B31D | 0.011 |
| Tritanopia (no blue cones) | #D5A396 | 0.144 |
| Achromatopsia (no color) | #B0B0B0 | 0.157 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #C5B100
#C5B100
oklch(75.4% 0.157 101.2)
- #A1A5FF
#A1A5FF
oklch(75.5% 0.129 280.9)
Analogous
Neighbouring hues, 30° either side.
Split complementary
The two hues beside the complement (150° and 210°).
Triadic
Three hues spaced 120° apart.
Palettes and gradients that use #C5B100
These curated palettes and gradients contain exactly #C5B100. Open one to see the full color scheme around it.
Gradients
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Mustard #CEB301 ΔE 0.015
- Olive Yellow #C2B709 ΔE 0.015
- Muddy Yellow #BFAC05 ΔE 0.017
- Burnt Yellow #D5AB09 ΔE 0.029
- Dark Yellow #D5B60A ΔE 0.029
- Mustard Yellow #D2BD0A ΔE 0.038
- Mustard Green #A8B504 ΔE 0.043
- Goldenrod #DAA520 ΔE 0.047
Use #C5B100 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.