#51B43E
Closest named color: Leafy Green (#51B73B). oklch(68.6% 0.181 140.6), rgb(81, 180, 62).
Aa
Black text reads best on this color (7.94:1).
About this color
#51B43E is a medium-light, vivid green. In OKLCH its lightness is 69%, its chroma 0.181 and its hue 141°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Leafy Green (#51B73B), ΔE 0.010 away. Black text reads best on it, at 7.94:1.
| Hue family | Greens |
| Lightness | medium-light (69%) |
| Chroma | vivid (0.181) |
| Temperature | in between |
| Nearest name | Leafy Green (#51B73B) |
| Black text | 7.94:1 |
| White text | 2.64:1 |
Values
| HEX | #51B43E |
| RGB | rgb(81, 180, 62) |
| HSL | hsl(110, 49%, 47%) |
| OKLCH | oklch(68.6% 0.181 140.6) |
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 #51B43E | 2.64:1 | Fails | Lc -56.3 | Large or bold text, headings |
| Black text on #51B43E | 7.94:1 | AAA | Lc 52.9 | Large or bold text, headings |
| #51B43E text on white | 2.64:1 | Fails | Lc 51.1 | Large or bold text, headings |
| #51B43E text on black | 7.94:1 | AAA | Lc -50.8 | 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 400.
-
Step 50
50
#F0F8EF
oklch(97.1% 0.015 142.2)
-
Step 100
100
#DFF0DB
oklch(93.7% 0.033 139.7)
-
Step 200
200
#C3E4BD
oklch(88.5% 0.063 140.8)
-
Step 300
300
#98D38D
oklch(80.9% 0.114 140.6)
-
Step 400
400 (this color)
#51B43E
oklch(68.6% 0.181 140.6)
-
Step 500
500
#2BA500
oklch(63.1% 0.206 140.6)
-
Step 600
600
#228B00
oklch(55.6% 0.182 140.6)
-
Step 700
700
#1B7500
oklch(49.1% 0.16 140.7)
-
Step 800
800
#156000
oklch(42.7% 0.139 140.6)
-
Step 900
900
#105000
oklch(37.7% 0.123 140.6)
-
Step 950
950
#063000
oklch(27% 0.088 140.7)
#51B43E 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) | #B9A42F | 0.125 |
| Deuteranopia (no green cones) | #AC9C48 | 0.125 |
| Tritanopia (no blue cones) | #45AE9C | 0.122 |
| Achromatopsia (no color) | #9F9F9F | 0.182 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #51B43E
#51B43E
oklch(68.6% 0.181 140.6)
- #CB6FDE
#CB6FDE
oklch(68.7% 0.182 320.6)
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 #51B43E, closest first.
No curated palette has a color within ΔE 0.04 of #51B43E.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Leafy Green #51B73B ΔE 0.010
- Grass #5CAC2D ΔE 0.022
- Medium Green #39AD48 ΔE 0.030
- Shamrock #01B44C ΔE 0.031
- Dark Pastel Green #56AE57 ΔE 0.035
- Leaf Green #5CA904 ΔE 0.035
- Leaf #71AA34 ΔE 0.036
- Cool Green #33B864 ΔE 0.036
Use #51B43E 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.