#91CB51
Closest named color: Yellow Green (#9ACD32). oklch(77.7% 0.165 130.8), rgb(145, 203, 81).
Aa
Black text reads best on this color (10.86:1).
About this color
#91CB51 is a medium-light, vivid green. In OKLCH its lightness is 78%, its chroma 0.165 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 0.024 away. Black text reads best on it, at 10.86:1.
| Hue family | Greens |
| Lightness | medium-light (78%) |
| Chroma | vivid (0.165) |
| Temperature | in between |
| Nearest name | Yellow Green (#9ACD32) |
| Black text | 10.86:1 |
| White text | 1.93:1 |
Values
| HEX | #91CB51 |
| RGB | rgb(145, 203, 81) |
| HSL | hsl(89, 54%, 56%) |
| OKLCH | oklch(77.7% 0.165 130.8) |
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 #91CB51 | 1.93:1 | Fails | Lc -41.2 | Non-text elements, placeholder text |
| Black text on #91CB51 | 10.86:1 | AAA | Lc 67.0 | Content text, not long reading |
| #91CB51 text on white | 1.93:1 | Fails | Lc 36.9 | Non-text elements, placeholder text |
| #91CB51 text on black | 10.86:1 | 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
#DFF1D0
oklch(93.6% 0.048 130.8)
-
Step 200
200
#C4E6A7
oklch(88.5% 0.091 131.1)
-
Step 300
300 (this color)
#91CB51
oklch(77.7% 0.165 130.8)
-
Step 400
400
#75B700
oklch(70.7% 0.193 130.7)
-
Step 500
500
#639D00
oklch(63.1% 0.172 130.9)
-
Step 600
600
#538400
oklch(55.7% 0.152 130.8)
-
Step 700
700
#456F00
oklch(49.2% 0.134 130.8)
-
Step 800
800
#385B00
oklch(42.8% 0.116 130.7)
-
Step 900
900
#2E4C00
oklch(37.8% 0.103 130.7)
-
Step 950
950
#192D00
oklch(27% 0.074 130.9)
#91CB51 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) | #D3BD43 | 0.089 |
| Deuteranopia (no green cones) | #CBB95A | 0.090 |
| Tritanopia (no blue cones) | #94C3B1 | 0.126 |
| Achromatopsia (no color) | #BABABA | 0.165 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #91CB51
#91CB51
oklch(77.7% 0.165 130.8)
- #D698FF
#D698FF
oklch(77.7% 0.155 310.9)
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 #91CB51, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Yellow Green #9ACD32 ΔE 0.024
- Slime Green #99CC04 ΔE 0.037
- Pea #A4BF20 ΔE 0.038
- Apple #6ECB3C ΔE 0.043
- Light Olive Green #A4BE5C ΔE 0.046
- Apple Green #76CD26 ΔE 0.046
- Bright Olive #9CBB04 ΔE 0.047
- Fresh Green #69D84F ΔE 0.050
Use #91CB51 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.