#ACAC01
Closest named color: Mustard Green (#A8B504). oklch(72.1% 0.157 109.8), rgb(172, 172, 1).
Aa
Black text reads best on this color (8.65:1).
About this color
#ACAC01 is a medium-light, vivid yellow. In OKLCH its lightness is 72%, its chroma 0.157 and its hue 110°. Its hue sits on the warm side of the wheel. The nearest named color is Mustard Green (#A8B504), ΔE 0.024 away. Black text reads best on it, at 8.65:1.
| Hue family | Yellows |
| Lightness | medium-light (72%) |
| Chroma | vivid (0.157) |
| Temperature | warm |
| Nearest name | Mustard Green (#A8B504) |
| Black text | 8.65:1 |
| White text | 2.42:1 |
Values
| HEX | #ACAC01 |
| RGB | rgb(172, 172, 1) |
| HSL | hsl(60, 99%, 34%) |
| OKLCH | oklch(72.1% 0.157 109.8) |
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 #ACAC01 | 2.42:1 | Fails | Lc -52.6 | Large or bold text, headings |
| Black text on #ACAC01 | 8.65:1 | AAA | Lc 56.4 | Large or bold text, headings |
| #ACAC01 text on white | 2.42:1 | Fails | Lc 47.6 | Large or bold text, headings |
| #ACAC01 text on black | 8.65:1 | AAA | Lc -54.5 | 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
#F6F6EC
oklch(97% 0.013 106.6)
-
Step 100
100
#EBECD6
oklch(93.6% 0.029 109.1)
-
Step 200
200
#DBDDB4
oklch(88.6% 0.054 109.8)
-
Step 300
300
#C4C67B
oklch(80.8% 0.097 109.7)
-
Step 400
400 (this color)
#ACAC01
oklch(72.1% 0.157 109.8)
-
Step 500
500
#909000
oklch(63.2% 0.138 109.8)
-
Step 600
600
#797800
oklch(55.5% 0.121 109.2)
-
Step 700
700
#656500
oklch(49.1% 0.107 109.8)
-
Step 800
800
#535300
oklch(42.8% 0.093 109.8)
-
Step 900
900
#454500
oklch(37.8% 0.082 109.8)
-
Step 950
950
#292900
oklch(27.2% 0.059 109.8)
#ACAC01 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) | #BBA400 | 0.030 |
| Deuteranopia (no green cones) | #BDA81E | 0.030 |
| Tritanopia (no blue cones) | #B9A092 | 0.142 |
| Achromatopsia (no color) | #A6A6A6 | 0.157 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #ACAC01
#ACAC01
oklch(72.1% 0.157 109.8)
- #A491FF
#A491FF
oklch(72% 0.157 289.8)
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 #ACAC01, closest first.
No curated palette has a color within ΔE 0.04 of #ACAC01.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Mustard Green #A8B504 ΔE 0.024
- Muddy Yellow #BFAC05 ΔE 0.029
- Avocado #90B134 ΔE 0.038
- Icky Green #8FAE22 ΔE 0.038
- Pea Soup Green #94A617 ΔE 0.039
- Pea Green #8EAB12 ΔE 0.042
- Bright Olive #9CBB04 ΔE 0.044
- Olive Yellow #C2B709 ΔE 0.046
Use #ACAC01 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.