#A9B201
Closest named color: Mustard Green (#A8B504). oklch(73.2% 0.163 113.4), rgb(169, 178, 1).
Aa
Black text reads best on this color (9.05:1).
About this color
#A9B201 is a medium-light, vivid yellow. In OKLCH its lightness is 73%, its chroma 0.163 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 0.008 away. Black text reads best on it, at 9.05:1.
| Hue family | Yellows |
| Lightness | medium-light (73%) |
| Chroma | vivid (0.163) |
| Temperature | in between |
| Nearest name | Mustard Green (#A8B504) |
| Black text | 9.05:1 |
| White text | 2.31:1 |
Values
| HEX | #A9B201 |
| RGB | rgb(169, 178, 1) |
| HSL | hsl(63, 99%, 35%) |
| OKLCH | oklch(73.2% 0.163 113.4) |
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 #A9B201 | 2.31:1 | Fails | Lc -50.4 | Large or bold text, headings |
| Black text on #A9B201 | 9.05:1 | AAA | Lc 58.5 | Large or bold text, headings |
| #A9B201 text on white | 2.31:1 | Fails | Lc 45.5 | Large or bold text, headings |
| #A9B201 text on black | 9.05:1 | AAA | Lc -56.6 | 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
#F5F7EC
oklch(97.2% 0.015 115)
-
Step 100
100
#E9ECD6
oklch(93.5% 0.029 113.3)
-
Step 200
200
#D8DEB3
oklch(88.5% 0.057 114)
-
Step 300
300
#C0C879
oklch(80.9% 0.102 113.4)
-
Step 400
400 (this color)
#A9B201
oklch(73.2% 0.163 113.4)
-
Step 500
500
#8A9200
oklch(63.2% 0.142 113.6)
-
Step 600
600
#747A00
oklch(55.6% 0.124 113.2)
-
Step 700
700
#616700
oklch(49.2% 0.11 113.7)
-
Step 800
800
#4F5400
oklch(42.7% 0.096 113.7)
-
Step 900
900
#424600
oklch(37.8% 0.084 113.4)
-
Step 950
950
#272900
oklch(27% 0.06 112.6)
#A9B201 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) | #C0A900 | 0.040 |
| Deuteranopia (no green cones) | #C0AC20 | 0.040 |
| Tritanopia (no blue cones) | #B5A697 | 0.146 |
| Achromatopsia (no color) | #AAAAAA | 0.164 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #A9B201
#A9B201
oklch(73.2% 0.163 113.4)
- #AD93FF
#AD93FF
oklch(73.1% 0.154 293.3)
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 #A9B201, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Mustard Green #A8B504 ΔE 0.008
- Bright Olive #9CBB04 ΔE 0.028
- Pea #A4BF20 ΔE 0.033
- Avocado #90B134 ΔE 0.035
- Muddy Yellow #BFAC05 ΔE 0.035
- Icky Green #8FAE22 ΔE 0.038
- Olive Yellow #C2B709 ΔE 0.040
- Pea Green #8EAB12 ΔE 0.043
Use #A9B201 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.