#51C862
Closest named color: Algae Green (#21C36F). oklch(74.2% 0.178 146.2), rgb(81, 200, 98).
Aa
Black text reads best on this color (9.78:1).
About this color
#51C862 is a medium-light, vivid green. In OKLCH its lightness is 74%, its chroma 0.178 and its hue 146°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Algae Green (#21C36F), ΔE 0.032 away. Black text reads best on it, at 9.78:1.
| Hue family | Greens |
| Lightness | medium-light (74%) |
| Chroma | vivid (0.178) |
| Temperature | in between |
| Nearest name | Algae Green (#21C36F) |
| Black text | 9.78:1 |
| White text | 2.14:1 |
Values
| HEX | #51C862 |
| RGB | rgb(81, 200, 98) |
| HSL | hsl(129, 52%, 55%) |
| OKLCH | oklch(74.2% 0.178 146.2) |
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 #51C862 | 2.14:1 | Fails | Lc -46.4 | Large or bold text, headings |
| Black text on #51C862 | 9.78:1 | AAA | Lc 62.2 | Content text, not long reading |
| #51C862 text on white | 2.14:1 | Fails | Lc 41.8 | Non-text elements, placeholder text |
| #51C862 text on black | 9.78:1 | AAA | Lc -60.5 | 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
#EFF8F0
oklch(97% 0.014 148.8)
-
Step 100
100
#DDF0DD
oklch(93.6% 0.032 145.3)
-
Step 200
200
#C0E5C1
oklch(88.6% 0.062 145.7)
-
Step 300
300
#91D495
oklch(80.9% 0.111 145.9)
-
Step 400
400 (this color)
#51C862
oklch(74.2% 0.178 146.2)
-
Step 500
500
#00A636
oklch(63.1% 0.192 146.2)
-
Step 600
600
#008C2C
oklch(55.7% 0.169 146.1)
-
Step 700
700
#007624
oklch(49.2% 0.15 146.2)
-
Step 800
800
#00601C
oklch(42.6% 0.129 146.3)
-
Step 900
900
#005116
oklch(37.9% 0.115 146.2)
-
Step 950
950
#003009
oklch(26.9% 0.082 146)
#51C862 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) | #CBB759 | 0.138 |
| Deuteranopia (no green cones) | #BBAD69 | 0.135 |
| Tritanopia (no blue cones) | #36C4B0 | 0.105 |
| Achromatopsia (no color) | #B1B1B1 | 0.179 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #51C862
#51C862
oklch(74.2% 0.178 146.2)
- #E37FE6
#E37FE6
oklch(74.1% 0.177 326.1)
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 #51C862, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Algae Green #21C36F ΔE 0.032
- Seaweed #18D17B ΔE 0.033
- Dark Mint #48C072 ΔE 0.034
- Apple #6ECB3C ΔE 0.039
- Dark Mint Green #20C073 ΔE 0.041
- Soft Green #6FC276 ΔE 0.042
- Shamrock Green #02C14D ΔE 0.045
- Turtle Green #75B84F ΔE 0.047
Use #51C862 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.