#51AF73
Closest named color: Dark Seafoam Green (#3EAF76). oklch(68.1% 0.127 153.4), rgb(81, 175, 115).
Aa
Black text reads best on this color (7.72:1).
About this color
#51AF73 is a medium-light, moderately saturated green. In OKLCH its lightness is 68%, its chroma 0.127 and its hue 153°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Dark Seafoam Green (#3EAF76), ΔE 0.013 away. Black text reads best on it, at 7.72:1.
| Hue family | Greens |
| Lightness | medium-light (68%) |
| Chroma | moderately saturated (0.127) |
| Temperature | in between |
| Nearest name | Dark Seafoam Green (#3EAF76) |
| Black text | 7.72:1 |
| White text | 2.71:1 |
Values
| HEX | #51AF73 |
| RGB | rgb(81, 175, 115) |
| HSL | hsl(142, 37%, 50%) |
| OKLCH | oklch(68.1% 0.127 153.4) |
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 #51AF73 | 2.71:1 | Fails | Lc -57.6 | Large or bold text, headings |
| Black text on #51AF73 | 7.72:1 | AAA | Lc 51.6 | Large or bold text, headings |
| #51AF73 text on white | 2.71:1 | Fails | Lc 52.4 | Large or bold text, headings |
| #51AF73 text on black | 7.72:1 | AAA | Lc -49.5 | 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
#F0F8F2
oklch(97.1% 0.012 153.7)
-
Step 100
100
#DFEFE3
oklch(93.7% 0.023 153.4)
-
Step 200
200
#C4E2CC
oklch(88.5% 0.044 153.6)
-
Step 300
300
#99D0A9
oklch(80.9% 0.079 153.5)
-
Step 400
400 (this color)
#51AF73
oklch(68.1% 0.127 153.4)
-
Step 500
500
#00A458
oklch(63% 0.161 153.3)
-
Step 600
600
#008A49
oklch(55.5% 0.142 153.3)
-
Step 700
700
#00743D
oklch(49% 0.125 153.5)
-
Step 800
800
#005F31
oklch(42.6% 0.108 153.6)
-
Step 900
900
#005028
oklch(37.8% 0.097 153.4)
-
Step 950
950
#022F16
oklch(26.9% 0.066 153.5)
#51AF73 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) | #AFA26F | 0.111 |
| Deuteranopia (no green cones) | #A29977 | 0.109 |
| Tritanopia (no blue cones) | #38AD9F | 0.064 |
| Achromatopsia (no color) | #9D9D9D | 0.127 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #51AF73
#51AF73
oklch(68.1% 0.127 153.4)
- #C779B9
#C779B9
oklch(68% 0.127 333.7)
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 #51AF73, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Seafoam Green #3EAF76 ΔE 0.013
- Algae #54AC68 ΔE 0.014
- Medium Sea Green #3CB371 ΔE 0.018
- Bluey Green #2BB179 ΔE 0.021
- Seaweed Green #35AD6B ΔE 0.024
- Tea #65AB7C ΔE 0.027
- Dark Seafoam #1FB57A ΔE 0.027
- Boring Green #63B365 ΔE 0.027
Use #51AF73 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.