#91CB57
Closest named color: Yellow Green (#9ACD32). oklch(77.8% 0.159 131.4), rgb(145, 203, 87).
Aa
Black text reads best on this color (10.88:1).
About this color
#91CB57 is a medium-light, vivid green. In OKLCH its lightness is 78%, its chroma 0.159 and its hue 131°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Yellow Green (#9ACD32), ΔE 0.029 away. Black text reads best on it, at 10.88:1.
| Hue family | Greens |
| Lightness | medium-light (78%) |
| Chroma | vivid (0.159) |
| Temperature | in between |
| Nearest name | Yellow Green (#9ACD32) |
| Black text | 10.88:1 |
| White text | 1.92:1 |
Values
| HEX | #91CB57 |
| RGB | rgb(145, 203, 87) |
| HSL | hsl(90, 53%, 57%) |
| OKLCH | oklch(77.8% 0.159 131.4) |
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 #91CB57 | 1.92:1 | Fails | Lc -41.1 | Non-text elements, placeholder text |
| Black text on #91CB57 | 10.88:1 | AAA | Lc 67.1 | Content text, not long reading |
| #91CB57 text on white | 1.92:1 | Fails | Lc 36.8 | Non-text elements, placeholder text |
| #91CB57 text on black | 10.88:1 | AAA | Lc -65.6 | 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
#F0F9EA
oklch(97.1% 0.022 132.5)
-
Step 100
100
#DFF1D1
oklch(93.6% 0.046 131.4)
-
Step 200
200
#C4E6A9
oklch(88.5% 0.089 131.7)
-
Step 300
300 (this color)
#91CB57
oklch(77.8% 0.159 131.4)
-
Step 400
400
#72B700
oklch(70.6% 0.194 131.4)
-
Step 500
500
#619D00
oklch(63% 0.173 131.4)
-
Step 600
600
#518400
oklch(55.5% 0.153 131.4)
-
Step 700
700
#436F00
oklch(49% 0.135 131.5)
-
Step 800
800
#365B00
oklch(42.7% 0.117 131.5)
-
Step 900
900
#2C4C00
oklch(37.7% 0.104 131.6)
-
Step 950
950
#182D00
oklch(26.9% 0.074 131.6)
#91CB57 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) | #D3BD4B | 0.089 |
| Deuteranopia (no green cones) | #CBB95F | 0.090 |
| Tritanopia (no blue cones) | #93C3B2 | 0.122 |
| Achromatopsia (no color) | #BBBBBB | 0.160 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #91CB57
#91CB57
oklch(77.8% 0.159 131.4)
- #D798FF
#D798FF
oklch(77.8% 0.156 311.3)
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 #91CB57, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Yellow Green #9ACD32 ΔE 0.029
- Pea #A4BF20 ΔE 0.041
- Slime Green #99CC04 ΔE 0.042
- Light Olive Green #A4BE5C ΔE 0.043
- Light Moss Green #A6C875 ΔE 0.046
- Apple #6ECB3C ΔE 0.047
- Bright Olive #9CBB04 ΔE 0.050
- Apple Green #76CD26 ΔE 0.051
Use #91CB57 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.