#51A30B
Closest named color: Leaf Green (#5CA904). oklch(63.8% 0.186 135.9), rgb(81, 163, 11).
Aa
Black text reads best on this color (6.59:1).
About this color
#51A30B is a medium-light, vivid green. In OKLCH its lightness is 64%, its chroma 0.186 and its hue 136°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Leaf Green (#5CA904), ΔE 0.021 away. Black text reads best on it, at 6.59:1.
| Hue family | Greens |
| Lightness | medium-light (64%) |
| Chroma | vivid (0.186) |
| Temperature | in between |
| Nearest name | Leaf Green (#5CA904) |
| Black text | 6.59:1 |
| White text | 3.18:1 |
Values
| HEX | #51A30B |
| RGB | rgb(81, 163, 11) |
| HSL | hsl(92, 87%, 34%) |
| OKLCH | oklch(63.8% 0.186 135.9) |
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 #51A30B | 3.18:1 | AA large text | Lc -64.1 | Content text, not long reading |
| Black text on #51A30B | 6.59:1 | AA | Lc 45.4 | Large or bold text, headings |
| #51A30B text on white | 3.18:1 | AA large text | Lc 58.6 | Large or bold text, headings |
| #51A30B text on black | 6.59:1 | AA | Lc -43.1 | Non-text elements, placeholder text |
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
#F2F7EF
oklch(97% 0.012 133.4)
-
Step 100
100
#E2EEDD
oklch(93.5% 0.026 136.3)
-
Step 200
200
#CBE1C0
oklch(88.5% 0.05 135.1)
-
Step 300
300
#A6CE94
oklch(80.8% 0.09 136.2)
-
Step 400
400
#75B554
oklch(70.8% 0.146 136.1)
-
Step 500
500 (this color)
#51A30B
oklch(63.8% 0.186 135.9)
-
Step 600
600
#418700
oklch(55.5% 0.165 135.8)
-
Step 700
700
#357200
oklch(49.1% 0.146 136)
-
Step 800
800
#2B5D00
oklch(42.6% 0.126 135.7)
-
Step 900
900
#224E00
oklch(37.7% 0.112 136.1)
-
Step 950
950
#132E02
oklch(26.9% 0.077 135.9)
#51A30B 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) | #A99400 | 0.115 |
| Deuteranopia (no green cones) | #9F8E24 | 0.114 |
| Tritanopia (no blue cones) | #4D9D8A | 0.133 |
| Achromatopsia (no color) | #909090 | 0.187 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #51A30B
#51A30B
oklch(63.8% 0.186 135.9)
- #B661D6
#B661D6
oklch(63.8% 0.186 315.9)
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 #51A30B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Leaf Green #5CA904 ΔE 0.021
- Grassy Green #419C03 ΔE 0.026
- Grass Green #3F9B0B ΔE 0.030
- Grass #5CAC2D ΔE 0.031
- Kelly Green #02AB2E ΔE 0.035
- Mid Green #50A747 ΔE 0.037
- Medium Green #39AD48 ΔE 0.039
- Leaf #71AA34 ΔE 0.047
Use #51A30B 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.