#A9B428
Closest named color: Mustard Green (#A8B504). oklch(73.7% 0.154 114.2), rgb(169, 180, 40).
Aa
Black text reads best on this color (9.24:1).
About this color
#A9B428 is a medium-light, vivid yellow. In OKLCH its lightness is 74%, its chroma 0.154 and its hue 114°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Mustard Green (#A8B504), ΔE 0.012 away. Black text reads best on it, at 9.24:1.
| Hue family | Yellows |
| Lightness | medium-light (74%) |
| Chroma | vivid (0.154) |
| Temperature | in between |
| Nearest name | Mustard Green (#A8B504) |
| Black text | 9.24:1 |
| White text | 2.27:1 |
Values
| HEX | #A9B428 |
| RGB | rgb(169, 180, 40) |
| HSL | hsl(65, 64%, 43%) |
| OKLCH | oklch(73.7% 0.154 114.2) |
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 #A9B428 | 2.27:1 | Fails | Lc -49.5 | Large or bold text, headings |
| Black text on #A9B428 | 9.24:1 | AAA | Lc 59.3 | Large or bold text, headings |
| #A9B428 text on white | 2.27:1 | Fails | Lc 44.6 | Non-text elements, placeholder text |
| #A9B428 text on black | 9.24:1 | AAA | Lc -57.5 | 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
#F5F7ED
oklch(97.2% 0.013 115.8)
-
Step 100
100
#E9ECD7
oklch(93.5% 0.028 113.5)
-
Step 200
200
#D8DEB6
oklch(88.6% 0.053 114.4)
-
Step 300
300
#BFC87F
oklch(80.9% 0.096 114.3)
-
Step 400
400 (this color)
#A9B428
oklch(73.7% 0.154 114.2)
-
Step 500
500
#899200
oklch(63.1% 0.142 114.1)
-
Step 600
600
#737B00
oklch(55.7% 0.125 114.2)
-
Step 700
700
#606700
oklch(49.1% 0.111 114.3)
-
Step 800
800
#4F5400
oklch(42.7% 0.096 113.7)
-
Step 900
900
#414600
oklch(37.7% 0.085 114.3)
-
Step 950
950
#262900
oklch(26.9% 0.06 113.9)
#A9B428 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) | #C2AB00 | 0.039 |
| Deuteranopia (no green cones) | #C1AD35 | 0.042 |
| Tritanopia (no blue cones) | #B5A99A | 0.136 |
| Achromatopsia (no color) | #ACACAC | 0.154 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #A9B428
#A9B428
oklch(73.7% 0.154 114.2)
- #B095FF
#B095FF
oklch(73.7% 0.151 294.1)
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 #A9B428, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Mustard Green #A8B504 ΔE 0.012
- Bright Olive #9CBB04 ΔE 0.031
- Pea #A4BF20 ΔE 0.031
- Muddy Yellow #BFAC05 ΔE 0.034
- Avocado #90B134 ΔE 0.035
- Olive Yellow #C2B709 ΔE 0.037
- Light Olive Green #A4BE5C ΔE 0.040
- Icky Green #8FAE22 ΔE 0.041
Use #A9B428 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.