#B1BE39
Closest named color: Pea (#A4BF20). oklch(76.7% 0.153 114.9), rgb(177, 190, 57).
Aa
Black text reads best on this color (10.29:1).
About this color
#B1BE39 is a medium-light, vivid yellow. In OKLCH its lightness is 77%, its chroma 0.153 and its hue 115°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Pea (#A4BF20), ΔE 0.025 away. Black text reads best on it, at 10.29:1.
| Hue family | Yellows |
| Lightness | medium-light (77%) |
| Chroma | vivid (0.153) |
| Temperature | in between |
| Nearest name | Pea (#A4BF20) |
| Black text | 10.29:1 |
| White text | 2.04:1 |
Values
| HEX | #B1BE39 |
| RGB | rgb(177, 190, 57) |
| HSL | hsl(66, 54%, 48%) |
| OKLCH | oklch(76.7% 0.153 114.9) |
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 #B1BE39 | 2.04:1 | Fails | Lc -44.1 | Non-text elements, placeholder text |
| Black text on #B1BE39 | 10.29:1 | AAA | Lc 64.3 | Content text, not long reading |
| #B1BE39 text on white | 2.04:1 | Fails | Lc 39.6 | Non-text elements, placeholder text |
| #B1BE39 text on black | 10.29:1 | AAA | Lc -62.7 | Content text, not long reading |
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 300.
-
Step 50
50
#F5F7E8
oklch(97.1% 0.02 112.9)
-
Step 100
100
#E8EECD
oklch(93.6% 0.044 115.6)
-
Step 200
200
#D7E0A0
oklch(88.4% 0.084 114.6)
-
Step 300
300 (this color)
#B1BE39
oklch(76.7% 0.153 114.9)
-
Step 400
400
#9FAB00
oklch(70.7% 0.16 114.7)
-
Step 500
500
#889200
oklch(63% 0.142 114.5)
-
Step 600
600
#727B00
oklch(55.6% 0.126 114.8)
-
Step 700
700
#5F6700
oklch(49% 0.111 115)
-
Step 800
800
#4E5400
oklch(42.6% 0.096 114.4)
-
Step 900
900
#414600
oklch(37.7% 0.085 114.3)
-
Step 950
950
#262A00
oklch(27.2% 0.062 115.2)
#B1BE39 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) | #CCB523 | 0.041 |
| Deuteranopia (no green cones) | #CBB743 | 0.043 |
| Tritanopia (no blue cones) | #BCB3A4 | 0.134 |
| Achromatopsia (no color) | #B5B5B5 | 0.153 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #B1BE39
#B1BE39
oklch(76.7% 0.153 114.9)
- #BAA1FF
#BAA1FF
oklch(76.7% 0.134 295.3)
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 #B1BE39, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Pea #A4BF20 ΔE 0.025
- Olive Yellow #C2B709 ΔE 0.028
- Light Olive Green #A4BE5C ΔE 0.030
- Mustard Green #A8B504 ΔE 0.033
- Bright Olive #9CBB04 ΔE 0.039
- Light Olive #ACBF69 ΔE 0.041
- Mustard #CEB301 ΔE 0.045
- Mustard Yellow #D2BD0A ΔE 0.046
Use #B1BE39 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.