#B1B22B
Closest named color: Mustard Green (#A8B504). oklch(74% 0.148 110), rgb(177, 178, 43).
Aa
Black text reads best on this color (9.27:1).
About this color
#B1B22B is a medium-light, vivid yellow. In OKLCH its lightness is 74%, its chroma 0.148 and its hue 110°. Its hue sits on the warm side of the wheel. The nearest named color is Mustard Green (#A8B504), ΔE 0.022 away. Black text reads best on it, at 9.27:1.
| Hue family | Yellows |
| Lightness | medium-light (74%) |
| Chroma | vivid (0.148) |
| Temperature | warm |
| Nearest name | Mustard Green (#A8B504) |
| Black text | 9.27:1 |
| White text | 2.26:1 |
Values
| HEX | #B1B22B |
| RGB | rgb(177, 178, 43) |
| HSL | hsl(60, 61%, 43%) |
| OKLCH | oklch(74% 0.148 110) |
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 #B1B22B | 2.26:1 | Fails | Lc -49.3 | Large or bold text, headings |
| Black text on #B1B22B | 9.27:1 | AAA | Lc 59.5 | Large or bold text, headings |
| #B1B22B text on white | 2.26:1 | Fails | Lc 44.5 | Non-text elements, placeholder text |
| #B1B22B text on black | 9.27:1 | AAA | Lc -57.6 | 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
#F6F6ED
oklch(97.1% 0.012 106.6)
-
Step 100
100
#EAECD8
oklch(93.6% 0.027 111.5)
-
Step 200
200
#DBDDB6
oklch(88.6% 0.052 109.8)
-
Step 300
300
#C4C67F
oklch(80.9% 0.092 109.7)
-
Step 400
400 (this color)
#B1B22B
oklch(74% 0.148 110)
-
Step 500
500
#8F9000
oklch(63.2% 0.138 110.3)
-
Step 600
600
#787900
oklch(55.7% 0.122 110.4)
-
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
#282900
oklch(27.1% 0.06 111.2)
#B1B22B 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) | #C1AA08 | 0.028 |
| Deuteranopia (no green cones) | #C2AE36 | 0.029 |
| Tritanopia (no blue cones) | #BEA699 | 0.135 |
| Achromatopsia (no color) | #ACACAC | 0.148 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #B1B22B
#B1B22B
oklch(74% 0.148 110)
- #AA99FF
#AA99FF
oklch(73.9% 0.145 290)
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 #B1B22B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Mustard Green #A8B504 ΔE 0.022
- Muddy Yellow #BFAC05 ΔE 0.023
- Olive Yellow #C2B709 ΔE 0.031
- Pea #A4BF20 ΔE 0.040
- Light Olive Green #A4BE5C ΔE 0.041
- Bright Olive #9CBB04 ΔE 0.042
- Mustard #CEB301 ΔE 0.043
- Avocado #90B134 ΔE 0.045
Use #B1B22B 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.