#ACB431
Closest named color: Mustard Green (#A8B504). oklch(74% 0.148 113), rgb(172, 180, 49).
Aa
Black text reads best on this color (9.32:1).
About this color
#ACB431 is a medium-light, vivid yellow. In OKLCH its lightness is 74%, its chroma 0.148 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 0.019 away. Black text reads best on it, at 9.32:1.
| Hue family | Yellows |
| Lightness | medium-light (74%) |
| Chroma | vivid (0.148) |
| Temperature | in between |
| Nearest name | Mustard Green (#A8B504) |
| Black text | 9.32:1 |
| White text | 2.25:1 |
Values
| HEX | #ACB431 |
| RGB | rgb(172, 180, 49) |
| HSL | hsl(64, 57%, 45%) |
| OKLCH | oklch(74% 0.148 113) |
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 #ACB431 | 2.25:1 | Fails | Lc -49.1 | Large or bold text, headings |
| Black text on #ACB431 | 9.32:1 | AAA | Lc 59.7 | Large or bold text, headings |
| #ACB431 text on white | 2.25:1 | Fails | Lc 44.3 | Non-text elements, placeholder text |
| #ACB431 text on black | 9.32:1 | AAA | Lc -57.9 | 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
#F5F6ED
oklch(97% 0.012 111.8)
-
Step 100
100
#E9ECD8
oklch(93.5% 0.027 113.8)
-
Step 200
200
#D9DDB7
oklch(88.5% 0.051 112.3)
-
Step 300
300
#C1C781
oklch(80.9% 0.092 112.4)
-
Step 400
400 (this color)
#ACB431
oklch(74% 0.148 113)
-
Step 500
500
#8B9100
oklch(63% 0.14 112.7)
-
Step 600
600
#747A00
oklch(55.6% 0.124 113.2)
-
Step 700
700
#626600
oklch(49% 0.109 112.4)
-
Step 800
800
#505400
oklch(42.8% 0.095 112.9)
-
Step 900
900
#424600
oklch(37.8% 0.084 113.4)
-
Step 950
950
#272900
oklch(27% 0.06 112.6)
#ACB431 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) | #C2AB17 | 0.036 |
| Deuteranopia (no green cones) | #C2AE3C | 0.038 |
| Tritanopia (no blue cones) | #B8A99B | 0.132 |
| Achromatopsia (no color) | #ADADAD | 0.148 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #ACB431
#ACB431
oklch(74% 0.148 113)
- #AF97FF
#AF97FF
oklch(74% 0.148 293)
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 #ACB431, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Mustard Green #A8B504 ΔE 0.019
- Muddy Yellow #BFAC05 ΔE 0.031
- Olive Yellow #C2B709 ΔE 0.034
- Pea #A4BF20 ΔE 0.035
- Light Olive Green #A4BE5C ΔE 0.036
- Bright Olive #9CBB04 ΔE 0.037
- Avocado #90B134 ΔE 0.039
- Icky Green #8FAE22 ΔE 0.046
Use #ACB431 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.