#CBB539
Closest named color: Mustard (#CEB301). oklch(77% 0.14 98.9), rgb(203, 181, 57).
Aa
Black text reads best on this color (10.20:1).
About this color
#CBB539 is a medium-light, vivid yellow. In OKLCH its lightness is 77%, its chroma 0.140 and its hue 99°. Its hue sits on the warm side of the wheel. The nearest named color is Mustard (#CEB301), ΔE 0.018 away. Black text reads best on it, at 10.20:1.
| Hue family | Yellows |
| Lightness | medium-light (77%) |
| Chroma | vivid (0.140) |
| Temperature | warm |
| Nearest name | Mustard (#CEB301) |
| Black text | 10.20:1 |
| White text | 2.05:1 |
Values
| HEX | #CBB539 |
| RGB | rgb(203, 181, 57) |
| HSL | hsl(51, 58%, 51%) |
| OKLCH | oklch(77% 0.14 98.9) |
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 #CBB539 | 2.05:1 | Fails | Lc -44.5 | Non-text elements, placeholder text |
| Black text on #CBB539 | 10.20:1 | AAA | Lc 63.9 | Content text, not long reading |
| #CBB539 text on white | 2.05:1 | Fails | Lc 40.0 | Non-text elements, placeholder text |
| #CBB539 text on black | 10.20:1 | AAA | Lc -62.3 | 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
#F8F6E8
oklch(97.1% 0.019 100.1)
-
Step 100
100
#F0EBCC
oklch(93.6% 0.041 99.6)
-
Step 200
200
#E6DB9F
oklch(88.6% 0.078 99)
-
Step 300
300 (this color)
#CBB539
oklch(77% 0.14 98.9)
-
Step 400
400
#B8A100
oklch(70.8% 0.147 99)
-
Step 500
500
#9E8A00
oklch(63.2% 0.131 99)
-
Step 600
600
#857300
oklch(55.6% 0.115 98.3)
-
Step 700
700
#6F6100
oklch(49.1% 0.102 99.4)
-
Step 800
800
#5B4F00
oklch(42.7% 0.088 99.2)
-
Step 900
900
#4C4200
oklch(37.8% 0.078 99.5)
-
Step 950
950
#2D2600
oklch(26.8% 0.056 98.7)
#CBB539 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) | #C7B025 | 0.017 |
| Deuteranopia (no green cones) | #CDB841 | 0.009 |
| Tritanopia (no blue cones) | #DBA89C | 0.128 |
| Achromatopsia (no color) | #B5B5B5 | 0.140 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #CBB539
#CBB539
oklch(77% 0.14 98.9)
- #A4ACFF
#A4ACFF
oklch(77% 0.119 279)
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 #CBB539, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Mustard #CEB301 ΔE 0.018
- Dark Yellow #D5B60A ΔE 0.022
- Olive Yellow #C2B709 ΔE 0.027
- Burnt Yellow #D5AB09 ΔE 0.028
- Mustard Yellow #D2BD0A ΔE 0.032
- Muddy Yellow #BFAC05 ΔE 0.035
- Goldenrod #DAA520 ΔE 0.042
- Dark Khaki #BDB76B ΔE 0.044
Use #CBB539 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.