#51D286
Closest named color: Seaweed (#18D17B). oklch(77.3% 0.158 154.2), rgb(81, 210, 134).
Aa
Black text reads best on this color (10.91:1).
About this color
#51D286 is a medium-light, vivid green. In OKLCH its lightness is 77%, its chroma 0.158 and its hue 154°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Seaweed (#18D17B), ΔE 0.029 away. Black text reads best on it, at 10.91:1.
| Hue family | Greens |
| Lightness | medium-light (77%) |
| Chroma | vivid (0.158) |
| Temperature | in between |
| Nearest name | Seaweed (#18D17B) |
| Black text | 10.91:1 |
| White text | 1.92:1 |
Values
| HEX | #51D286 |
| RGB | rgb(81, 210, 134) |
| HSL | hsl(145, 59%, 57%) |
| OKLCH | oklch(77.3% 0.158 154.2) |
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 #51D286 | 1.92:1 | Fails | Lc -40.8 | Non-text elements, placeholder text |
| Black text on #51D286 | 10.91:1 | AAA | Lc 67.4 | Content text, not long reading |
| #51D286 text on white | 1.92:1 | Fails | Lc 36.5 | Non-text elements, placeholder text |
| #51D286 text on black | 10.91:1 | AAA | Lc -66.0 | 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 300.
-
Step 50
50
#EBFAEF
oklch(97.1% 0.021 154.1)
-
Step 100
100
#D3F3DC
oklch(93.5% 0.045 154.2)
-
Step 200
200
#ABEBBF
oklch(88.5% 0.089 154.2)
-
Step 300
300 (this color)
#51D286
oklch(77.3% 0.158 154.2)
-
Step 400
400
#00BF6B
oklch(70.6% 0.177 154.2)
-
Step 500
500
#00A45B
oklch(63.1% 0.158 154.2)
-
Step 600
600
#008A4C
oklch(55.6% 0.139 154.3)
-
Step 700
700
#00743F
oklch(49.1% 0.123 154.3)
-
Step 800
800
#005F32
oklch(42.6% 0.107 154.1)
-
Step 900
900
#005029
oklch(37.8% 0.096 153.9)
-
Step 950
950
#003016
oklch(27.1% 0.069 153.7)
#51D286 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) | #D2C281 | 0.140 |
| Deuteranopia (no green cones) | #C1B68B | 0.137 |
| Tritanopia (no blue cones) | #1BD0BF | 0.079 |
| Achromatopsia (no color) | #BBBBBB | 0.159 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #51D286
#51D286
oklch(77.3% 0.158 154.2)
- #F18CDE
#F18CDE
oklch(77.3% 0.158 334.3)
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 #51D286, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Seaweed #18D17B ΔE 0.029
- Emerald #06D6A0 ΔE 0.034
- Aqua Green #12E193 ΔE 0.041
- Soft Green #6FC276 ΔE 0.044
- Greenblue #23C48B ΔE 0.051
- Dark Mint #48C072 ΔE 0.053
- Algae Green #21C36F ΔE 0.056
- Weird Green #3AE57F ΔE 0.057
Use #51D286 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.