#51A910
Closest named color: Leaf Green (#5CA904). oklch(65.4% 0.192 136.6), rgb(81, 169, 16).
Aa
Black text reads best on this color (7.03:1).
About this color
#51A910 is a medium-light, vivid green. In OKLCH its lightness is 65%, its chroma 0.192 and its hue 137°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Leaf Green (#5CA904), ΔE 0.009 away. Black text reads best on it, at 7.03:1.
| Hue family | Greens |
| Lightness | medium-light (65%) |
| Chroma | vivid (0.192) |
| Temperature | in between |
| Nearest name | Leaf Green (#5CA904) |
| Black text | 7.03:1 |
| White text | 2.98:1 |
Values
| HEX | #51A910 |
| RGB | rgb(81, 169, 16) |
| HSL | hsl(95, 83%, 36%) |
| OKLCH | oklch(65.4% 0.192 136.6) |
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 #51A910 | 2.98:1 | Fails | Lc -61.4 | Content text, not long reading |
| Black text on #51A910 | 7.03:1 | AAA | Lc 47.9 | Large or bold text, headings |
| #51A910 text on white | 2.98:1 | Fails | Lc 56.1 | Large or bold text, headings |
| #51A910 text on black | 7.03:1 | AAA | Lc -45.7 | 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 500.
-
Step 50
50
#F2F8EF
oklch(97.2% 0.013 134.9)
-
Step 100
100
#E2EEDD
oklch(93.5% 0.026 136.3)
-
Step 200
200
#CAE2C0
oklch(88.6% 0.052 136.4)
-
Step 300
300
#A5CF93
oklch(80.9% 0.093 136.5)
-
Step 400
400
#72B552
oklch(70.6% 0.15 136.6)
-
Step 500
500 (this color)
#51A910
oklch(65.4% 0.192 136.6)
-
Step 600
600
#3E8800
oklch(55.7% 0.167 136.5)
-
Step 700
700
#337200
oklch(49.1% 0.147 136.5)
-
Step 800
800
#285E00
oklch(42.8% 0.129 136.7)
-
Step 900
900
#214E00
oklch(37.7% 0.113 136.4)
-
Step 950
950
#112F01
oklch(27.1% 0.08 136.8)
#51A910 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) | #AF9A00 | 0.120 |
| Deuteranopia (no green cones) | #A49328 | 0.119 |
| Tritanopia (no blue cones) | #4CA28F | 0.137 |
| Achromatopsia (no color) | #959595 | 0.192 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #51A910
#51A910
oklch(65.4% 0.192 136.6)
- #BD64DD
#BD64DD
oklch(65.4% 0.191 316.3)
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 #51A910, closest first.
No curated palette has a color within ΔE 0.04 of #51A910.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Leaf Green #5CA904 ΔE 0.009
- Grass #5CAC2D ΔE 0.020
- Kelly Green #02AB2E ΔE 0.032
- Medium Green #39AD48 ΔE 0.033
- Mid Green #50A747 ΔE 0.038
- Leaf #71AA34 ΔE 0.041
- Leafy Green #51B73B ΔE 0.041
- Grassy Green #419C03 ΔE 0.042
Use #51A910 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.