#ACB31D
Closest named color: Mustard Green (#A8B504). oklch(73.7% 0.157 112.6), rgb(172, 179, 29).
Aa
Black text reads best on this color (9.21:1).
About this color
#ACB31D is a medium-light, vivid yellow. In OKLCH its lightness is 74%, its chroma 0.157 and its hue 113°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Mustard Green (#A8B504), ΔE 0.011 away. Black text reads best on it, at 9.21:1.
| Hue family | Yellows |
| Lightness | medium-light (74%) |
| Chroma | vivid (0.157) |
| Temperature | in between |
| Nearest name | Mustard Green (#A8B504) |
| Black text | 9.21:1 |
| White text | 2.27:1 |
Values
| HEX | #ACB31D |
| RGB | rgb(172, 179, 29) |
| HSL | hsl(63, 72%, 41%) |
| OKLCH | oklch(73.7% 0.157 112.6) |
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 #ACB31D | 2.27:1 | Fails | Lc -49.6 | Large or bold text, headings |
| Black text on #ACB31D | 9.21:1 | AAA | Lc 59.2 | Large or bold text, headings |
| #ACB31D text on white | 2.27:1 | Fails | Lc 44.8 | Non-text elements, placeholder text |
| #ACB31D text on black | 9.21:1 | AAA | Lc -57.4 | 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
#F5F7ED
oklch(97.2% 0.013 115.8)
-
Step 100
100
#EAECD7
oklch(93.6% 0.028 111.3)
-
Step 200
200
#D9DDB4
oklch(88.4% 0.054 112)
-
Step 300
300
#C1C87C
oklch(81% 0.099 112.9)
-
Step 400
400 (this color)
#ACB31D
oklch(73.7% 0.157 112.6)
-
Step 500
500
#8B9100
oklch(63% 0.14 112.7)
-
Step 600
600
#757A00
oklch(55.6% 0.124 112.6)
-
Step 700
700
#626600
oklch(49% 0.109 112.4)
-
Step 800
800
#505400
oklch(42.8% 0.095 112.9)
-
Step 900
900
#434600
oklch(37.9% 0.084 112.5)
-
Step 950
950
#272900
oklch(27% 0.06 112.6)
#ACB31D 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) | #C1AA00 | 0.035 |
| Deuteranopia (no green cones) | #C2AD2D | 0.038 |
| Tritanopia (no blue cones) | #B8A899 | 0.139 |
| Achromatopsia (no color) | #ACACAC | 0.157 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #ACB31D
#ACB31D
oklch(73.7% 0.157 112.6)
- #AE96FF
#AE96FF
oklch(73.7% 0.15 292.9)
Analogous
Neighbouring hues, 30° either side.
Split complementary
The two hues beside the complement (150° and 210°).
Triadic
Three hues spaced 120° apart.
Palettes with this color
Curated palettes that contain a color within ΔE 0.04 (OKLab) of #ACB31D, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Mustard Green #A8B504 ΔE 0.011
- Muddy Yellow #BFAC05 ΔE 0.030
- Bright Olive #9CBB04 ΔE 0.032
- Pea #A4BF20 ΔE 0.033
- Olive Yellow #C2B709 ΔE 0.034
- Avocado #90B134 ΔE 0.038
- Icky Green #8FAE22 ΔE 0.043
- Light Olive Green #A4BE5C ΔE 0.044
Use #ACB31D 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.