#ACB939
Closest named color: Mustard Green (#A8B504). oklch(75.2% 0.149 115.1), rgb(172, 185, 57).
Aa
Black text reads best on this color (9.75:1).
About this color
#ACB939 is a medium-light, vivid yellow. In OKLCH its lightness is 75%, its chroma 0.149 and its hue 115°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Mustard Green (#A8B504), ΔE 0.023 away. Black text reads best on it, at 9.75:1.
| Hue family | Yellows |
| Lightness | medium-light (75%) |
| Chroma | vivid (0.149) |
| Temperature | in between |
| Nearest name | Mustard Green (#A8B504) |
| Black text | 9.75:1 |
| White text | 2.15:1 |
Values
| HEX | #ACB939 |
| RGB | rgb(172, 185, 57) |
| HSL | hsl(66, 53%, 47%) |
| OKLCH | oklch(75.2% 0.149 115.1) |
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 #ACB939 | 2.15:1 | Fails | Lc -46.9 | Large or bold text, headings |
| Black text on #ACB939 | 9.75:1 | AAA | Lc 61.8 | Content text, not long reading |
| #ACB939 text on white | 2.15:1 | Fails | Lc 42.2 | Non-text elements, placeholder text |
| #ACB939 text on black | 9.75:1 | AAA | Lc -60.0 | 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 400.
-
Step 50
50
#F5F7ED
oklch(97.2% 0.013 115.8)
-
Step 100
100
#E9ECD8
oklch(93.5% 0.027 113.8)
-
Step 200
200
#D7DEB7
oklch(88.5% 0.052 115.7)
-
Step 300
300
#BEC882
oklch(80.9% 0.092 115.1)
-
Step 400
400 (this color)
#ACB939
oklch(75.2% 0.149 115.1)
-
Step 500
500
#879300
oklch(63.2% 0.144 115.4)
-
Step 600
600
#727B00
oklch(55.6% 0.126 114.8)
-
Step 700
700
#5F6700
oklch(49% 0.111 115)
-
Step 800
800
#4E5500
oklch(42.8% 0.097 115.1)
-
Step 900
900
#404600
oklch(37.6% 0.085 115.2)
-
Step 950
950
#262A00
oklch(27.2% 0.062 115.2)
#ACB939 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) | #C6B025 | 0.040 |
| Deuteranopia (no green cones) | #C5B243 | 0.042 |
| Tritanopia (no blue cones) | #B7AEA0 | 0.131 |
| Achromatopsia (no color) | #B1B1B1 | 0.149 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #ACB939
#ACB939
oklch(75.2% 0.149 115.1)
- #B69BFF
#B69BFF
oklch(75.3% 0.143 295.2)
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 #ACB939, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Mustard Green #A8B504 ΔE 0.023
- Pea #A4BF20 ΔE 0.027
- Light Olive Green #A4BE5C ΔE 0.027
- Olive Yellow #C2B709 ΔE 0.032
- Bright Olive #9CBB04 ΔE 0.034
- Muddy Yellow #BFAC05 ΔE 0.039
- Light Olive #ACBF69 ΔE 0.041
- Avocado #90B134 ΔE 0.046
Use #ACB939 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.