#51A438
Closest named color: Mid Green (#50A747). oklch(64.3% 0.165 139.2), rgb(81, 164, 56).
Aa
Black text reads best on this color (6.71:1).
About this color
#51A438 is a medium-light, vivid green. In OKLCH its lightness is 64%, its chroma 0.165 and its hue 139°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Mid Green (#50A747), ΔE 0.014 away. Black text reads best on it, at 6.71:1.
| Hue family | Greens |
| Lightness | medium-light (64%) |
| Chroma | vivid (0.165) |
| Temperature | in between |
| Nearest name | Mid Green (#50A747) |
| Black text | 6.71:1 |
| White text | 3.12:1 |
Values
| HEX | #51A438 |
| RGB | rgb(81, 164, 56) |
| HSL | hsl(106, 49%, 43%) |
| OKLCH | oklch(64.3% 0.165 139.2) |
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 #51A438 | 3.12:1 | AA large text | Lc -63.4 | Content text, not long reading |
| Black text on #51A438 | 6.71:1 | AA | Lc 46.0 | Large or bold text, headings |
| #51A438 text on white | 3.12:1 | AA large text | Lc 58.0 | Large or bold text, headings |
| #51A438 text on black | 6.71:1 | 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
#E2EEDF
oklch(93.6% 0.024 139.4)
-
Step 200
200
#CAE1C5
oklch(88.5% 0.045 140.1)
-
Step 300
300
#A6CE9C
oklch(81% 0.081 139.4)
-
Step 400
400
#74B463
oklch(70.7% 0.13 139.3)
-
Step 500
500 (this color)
#51A438
oklch(64.3% 0.165 139.2)
-
Step 600
600
#2E8A00
oklch(55.7% 0.176 139.3)
-
Step 700
700
#267400
oklch(49.1% 0.155 139.2)
-
Step 800
800
#1D5F00
oklch(42.7% 0.135 139.3)
-
Step 900
900
#1E4E0D
oklch(37.6% 0.107 139.1)
-
Step 950
950
#122E0A
oklch(27% 0.069 139.4)
#51A438 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) | #A9962A | 0.111 |
| Deuteranopia (no green cones) | #9E8F41 | 0.111 |
| Tritanopia (no blue cones) | #4A9F8E | 0.112 |
| Achromatopsia (no color) | #929292 | 0.166 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #51A438
#51A438
oklch(64.3% 0.165 139.2)
- #B767CC
#B767CC
oklch(64.2% 0.166 319)
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 #51A438, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Mid Green #50A747 ΔE 0.014
- Medium Green #39AD48 ΔE 0.027
- Grass #5CAC2D ΔE 0.029
- Leaf Green #5CA904 ΔE 0.032
- Fern #63A950 ΔE 0.033
- Muted Green #5FA052 ΔE 0.036
- Dark Pastel Green #56AE57 ΔE 0.038
- Grassy Green #419C03 ΔE 0.038
Use #51A438 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.