#51B267
Closest named color: Medium Sea Green (#3CB371). oklch(68.6% 0.143 148.8), rgb(81, 178, 103).
Aa
Black text reads best on this color (7.91:1).
About this color
#51B267 is a medium-light, vivid green. In OKLCH its lightness is 69%, its chroma 0.143 and its hue 149°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Medium Sea Green (#3CB371), ΔE 0.016 away. Black text reads best on it, at 7.91:1.
| Hue family | Greens |
| Lightness | medium-light (69%) |
| Chroma | vivid (0.143) |
| Temperature | in between |
| Nearest name | Medium Sea Green (#3CB371) |
| Black text | 7.91:1 |
| White text | 2.65:1 |
Values
| HEX | #51B267 |
| RGB | rgb(81, 178, 103) |
| HSL | hsl(134, 39%, 51%) |
| OKLCH | oklch(68.6% 0.143 148.8) |
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 #51B267 | 2.65:1 | Fails | Lc -56.6 | Large or bold text, headings |
| Black text on #51B267 | 7.91:1 | AAA | Lc 52.6 | Large or bold text, headings |
| #51B267 text on white | 2.65:1 | Fails | Lc 51.4 | Large or bold text, headings |
| #51B267 text on black | 7.91:1 | AAA | Lc -50.5 | 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
#F0F8F1
oklch(97.1% 0.013 149.3)
-
Step 100
100
#DFEFE1
oklch(93.6% 0.025 149.1)
-
Step 200
200
#C4E3C8
oklch(88.6% 0.049 148.8)
-
Step 300
300
#98D1A1
oklch(80.9% 0.089 148.9)
-
Step 400
400 (this color)
#51B267
oklch(68.6% 0.143 148.8)
-
Step 500
500
#00A546
oklch(63% 0.178 148.9)
-
Step 600
600
#008B3A
oklch(55.6% 0.157 148.9)
-
Step 700
700
#00752F
oklch(49.1% 0.139 148.8)
-
Step 800
800
#006025
oklch(42.7% 0.121 148.7)
-
Step 900
900
#00501E
oklch(37.6% 0.107 148.8)
-
Step 950
950
#013010
oklch(27% 0.075 149.1)
#51B267 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) | #B3A462 | 0.116 |
| Deuteranopia (no green cones) | #A69B6C | 0.115 |
| Tritanopia (no blue cones) | #3CAFA0 | 0.081 |
| Achromatopsia (no color) | #9F9F9F | 0.144 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #51B267
#51B267
oklch(68.6% 0.143 148.8)
- #CA78C5
#CA78C5
oklch(68.7% 0.142 329.2)
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 #51B267, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Medium Sea Green #3CB371 ΔE 0.016
- Boring Green #63B365 ΔE 0.016
- Algae #54AC68 ΔE 0.018
- Dark Pastel Green #56AE57 ΔE 0.018
- Cool Green #33B864 ΔE 0.025
- Jade Green #2BAF6A ΔE 0.026
- Dark Seafoam Green #3EAF76 ΔE 0.026
- Seaweed Green #35AD6B ΔE 0.026
Use #51B267 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.