#51C85E
Closest named color: Algae Green (#21C36F). oklch(74.1% 0.181 145.4), rgb(81, 200, 94).
Aa
Black text reads best on this color (9.77:1).
About this color
#51C85E is a medium-light, vivid green. In OKLCH its lightness is 74%, its chroma 0.181 and its hue 145°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Algae Green (#21C36F), ΔE 0.034 away. Black text reads best on it, at 9.77:1.
| Hue family | Greens |
| Lightness | medium-light (74%) |
| Chroma | vivid (0.181) |
| Temperature | in between |
| Nearest name | Algae Green (#21C36F) |
| Black text | 9.77:1 |
| White text | 2.14:1 |
Values
| HEX | #51C85E |
| RGB | rgb(81, 200, 94) |
| HSL | hsl(127, 52%, 55%) |
| OKLCH | oklch(74.1% 0.181 145.4) |
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 #51C85E | 2.14:1 | Fails | Lc -46.5 | Large or bold text, headings |
| Black text on #51C85E | 9.77:1 | AAA | Lc 62.1 | Content text, not long reading |
| #51C85E text on white | 2.14:1 | Fails | Lc 41.8 | Non-text elements, placeholder text |
| #51C85E text on black | 9.77:1 | AAA | Lc -60.4 | Content text, not long reading |
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
#EFF8EF
oklch(97% 0.015 145.5)
-
Step 100
100
#DDF0DD
oklch(93.6% 0.032 145.3)
-
Step 200
200
#C0E5C0
oklch(88.5% 0.063 145)
-
Step 300
300
#91D493
oklch(80.8% 0.113 145.1)
-
Step 400
400 (this color)
#51C85E
oklch(74.1% 0.181 145.4)
-
Step 500
500
#00A630
oklch(63.1% 0.196 145.4)
-
Step 600
600
#008C27
oklch(55.7% 0.173 145.4)
-
Step 700
700
#00761F
oklch(49.2% 0.153 145.3)
-
Step 800
800
#006118
oklch(42.8% 0.133 145.4)
-
Step 900
900
#005113
oklch(37.8% 0.117 145.5)
-
Step 950
950
#003008
oklch(26.9% 0.083 145.6)
#51C85E 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) | #CBB754 | 0.138 |
| Deuteranopia (no green cones) | #BCAD66 | 0.137 |
| Tritanopia (no blue cones) | #38C3B0 | 0.111 |
| Achromatopsia (no color) | #B1B1B1 | 0.182 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #51C85E
#51C85E
oklch(74.1% 0.181 145.4)
- #E37EE8
#E37EE8
oklch(74.1% 0.18 325.5)
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 #51C85E, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Algae Green #21C36F ΔE 0.034
- Seaweed #18D17B ΔE 0.035
- Apple #6ECB3C ΔE 0.036
- Dark Mint #48C072 ΔE 0.037
- Shamrock Green #02C14D ΔE 0.042
- Dark Mint Green #20C073 ΔE 0.044
- Soft Green #6FC276 ΔE 0.046
- Turtle Green #75B84F ΔE 0.047
Use #51C85E 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.