#A1B129
Closest named color: Mustard Green (#A8B504). oklch(72.4% 0.153 116.4), rgb(161, 177, 41).
Aa
Black text reads best on this color (8.83:1).
About this color
#A1B129 is a medium-light, vivid yellow. In OKLCH its lightness is 72%, its chroma 0.153 and its hue 116°. 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 8.83:1.
| Hue family | Yellows |
| Lightness | medium-light (72%) |
| Chroma | vivid (0.153) |
| Temperature | in between |
| Nearest name | Mustard Green (#A8B504) |
| Black text | 8.83:1 |
| White text | 2.37:1 |
Values
| HEX | #A1B129 |
| RGB | rgb(161, 177, 41) |
| HSL | hsl(67, 62%, 43%) |
| OKLCH | oklch(72.4% 0.153 116.4) |
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 #A1B129 | 2.37:1 | Fails | Lc -51.7 | Large or bold text, headings |
| Black text on #A1B129 | 8.83:1 | AAA | Lc 57.3 | Large or bold text, headings |
| #A1B129 text on white | 2.37:1 | Fails | Lc 46.7 | Large or bold text, headings |
| #A1B129 text on black | 8.83:1 | AAA | Lc -55.3 | 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
#E8EDD8
oklch(93.7% 0.028 117.8)
-
Step 200
200
#D7DEB7
oklch(88.5% 0.052 115.7)
-
Step 300
300
#BDC981
oklch(81% 0.095 116.3)
-
Step 400
400 (this color)
#A1B129
oklch(72.4% 0.153 116.4)
-
Step 500
500
#859300
oklch(63% 0.144 116.3)
-
Step 600
600
#707C00
oklch(55.7% 0.128 116.3)
-
Step 700
700
#5E6800
oklch(49.2% 0.113 116.2)
-
Step 800
800
#4C5500
oklch(42.7% 0.098 116.6)
-
Step 900
900
#3F4700
oklch(37.7% 0.087 116.8)
-
Step 950
950
#252A00
oklch(27.1% 0.062 116.5)
#A1B129 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) | #BEA703 | 0.045 |
| Deuteranopia (no green cones) | #BCA935 | 0.046 |
| Tritanopia (no blue cones) | #ABA798 | 0.133 |
| Achromatopsia (no color) | #A8A8A8 | 0.153 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #A1B129
#A1B129
oklch(72.4% 0.153 116.4)
- #B08FFA
#B08FFA
oklch(72.4% 0.154 296.6)
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 #A1B129, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Mustard Green #A8B504 ΔE 0.019
- Avocado #90B134 ΔE 0.022
- Icky Green #8FAE22 ΔE 0.027
- Bright Olive #9CBB04 ΔE 0.033
- Pea Green #8EAB12 ΔE 0.034
- Pea Soup Green #94A617 ΔE 0.037
- Pea #A4BF20 ΔE 0.040
- Muddy Yellow #BFAC05 ΔE 0.042
Use #A1B129 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.