#B1CA59
Closest named color: Light Moss Green (#A6C875). oklch(79.7% 0.142 120.2), rgb(177, 202, 89).
Aa
Black text reads best on this color (11.46:1).
About this color
#B1CA59 is a light, vivid yellow. In OKLCH its lightness is 80%, its chroma 0.142 and its hue 120°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Light Moss Green (#A6C875), ΔE 0.032 away. Black text reads best on it, at 11.46:1.
| Hue family | Yellows |
| Lightness | light (80%) |
| Chroma | vivid (0.142) |
| Temperature | in between |
| Nearest name | Light Moss Green (#A6C875) |
| Black text | 11.46:1 |
| White text | 1.83:1 |
Values
| HEX | #B1CA59 |
| RGB | rgb(177, 202, 89) |
| HSL | hsl(73, 52%, 57%) |
| OKLCH | oklch(79.7% 0.142 120.2) |
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 #B1CA59 | 1.83:1 | Fails | Lc -38.4 | Non-text elements, placeholder text |
| Black text on #B1CA59 | 11.46:1 | AAA | Lc 69.6 | Content text, not long reading |
| #B1CA59 text on white | 1.83:1 | Fails | Lc 34.2 | Non-text elements, placeholder text |
| #B1CA59 text on black | 11.46:1 | AAA | Lc -68.4 | 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
#F3F8EA
oklch(97.2% 0.019 122.8)
-
Step 100
100
#E6EED0
oklch(93.5% 0.041 119.3)
-
Step 200
200
#D2E1A7
oklch(88.4% 0.078 119.8)
-
Step 300
300 (this color)
#B1CA59
oklch(79.7% 0.142 120.2)
-
Step 400
400
#94AF00
oklch(70.8% 0.168 120.1)
-
Step 500
500
#7E9600
oklch(63.2% 0.151 120.4)
-
Step 600
600
#6A7E00
oklch(55.7% 0.132 120.1)
-
Step 700
700
#586A00
oklch(49.2% 0.117 120.6)
-
Step 800
800
#485600
oklch(42.6% 0.101 120)
-
Step 900
900
#3C4800
oklch(37.7% 0.09 119.9)
-
Step 950
950
#232B00
oklch(27.2% 0.064 120)
#B1CA59 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) | #D5C04D | 0.052 |
| Deuteranopia (no green cones) | #D2C060 | 0.054 |
| Tritanopia (no blue cones) | #BAC0B1 | 0.120 |
| Achromatopsia (no color) | #BFBFBF | 0.142 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #B1CA59
#B1CA59
oklch(79.7% 0.142 120.2)
- #C9ABFF
#C9ABFF
oklch(79.8% 0.12 300.1)
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 #B1CA59, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Light Moss Green #A6C875 ΔE 0.032
- Pale Olive Green #B1D27B ΔE 0.035
- Light Olive #ACBF69 ΔE 0.039
- Light Olive Green #A4BE5C ΔE 0.039
- Greenish Tan #BCCB7A ΔE 0.039
- Pale Olive #B9CC81 ΔE 0.045
- Yellow Green #9ACD32 ΔE 0.047
- Tan Green #A9BE70 ΔE 0.047
Use #B1CA59 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.