#51A42E
Closest named color: Mid Green (#50A747). oklch(64.3% 0.172 138.1), rgb(81, 164, 46).
Aa
Black text reads best on this color (6.69:1).
About this color
#51A42E is a medium-light, vivid green. In OKLCH its lightness is 64%, its chroma 0.172 and its hue 138°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Mid Green (#50A747), ΔE 0.021 away. Black text reads best on it, at 6.69:1.
| Hue family | Greens |
| Lightness | medium-light (64%) |
| Chroma | vivid (0.172) |
| Temperature | in between |
| Nearest name | Mid Green (#50A747) |
| Black text | 6.69:1 |
| White text | 3.13:1 |
Values
| HEX | #51A42E |
| RGB | rgb(81, 164, 46) |
| HSL | hsl(102, 56%, 41%) |
| OKLCH | oklch(64.3% 0.172 138.1) |
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 #51A42E | 3.13:1 | AA large text | Lc -63.5 | Content text, not long reading |
| Black text on #51A42E | 6.69:1 | AA | Lc 46.0 | Large or bold text, headings |
| #51A42E text on white | 3.13:1 | AA large text | Lc 58.1 | Large or bold text, headings |
| #51A42E text on black | 6.69:1 | AA | Lc -43.7 | 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
#F2F7F0
oklch(97% 0.011 136.6)
-
Step 100
100
#E2EEDE
oklch(93.6% 0.025 137.8)
-
Step 200
200
#CAE1C3
oklch(88.5% 0.047 138.4)
-
Step 300
300
#A6CE99
oklch(80.9% 0.084 138.1)
-
Step 400
400
#75B45E
oklch(70.7% 0.135 137.9)
-
Step 500
500 (this color)
#51A42E
oklch(64.3% 0.172 138.1)
-
Step 600
600
#368900
oklch(55.6% 0.172 138)
-
Step 700
700
#2C7300
oklch(49.1% 0.152 138.1)
-
Step 800
800
#235E00
oklch(42.6% 0.131 138)
-
Step 900
900
#1E4E05
oklch(37.6% 0.112 138)
-
Step 950
950
#132E07
oklch(27% 0.071 137.7)
#51A42E 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) | #A9961A | 0.111 |
| Deuteranopia (no green cones) | #9E8F39 | 0.111 |
| Tritanopia (no blue cones) | #4B9E8D | 0.120 |
| Achromatopsia (no color) | #919191 | 0.173 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #51A42E
#51A42E
oklch(64.3% 0.172 138.1)
- #B766CF
#B766CF
oklch(64.3% 0.171 318.1)
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 #51A42E, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Mid Green #50A747 ΔE 0.021
- Leaf Green #5CA904 ΔE 0.026
- Grass #5CAC2D ΔE 0.027
- Medium Green #39AD48 ΔE 0.029
- Grassy Green #419C03 ΔE 0.033
- Grass Green #3F9B0B ΔE 0.036
- Kelly Green #02AB2E ΔE 0.037
- Leaf #71AA34 ΔE 0.039
Use #51A42E 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.