#51CF86
Closest named color: Seaweed (#18D17B). oklch(76.6% 0.154 154.7), rgb(81, 207, 134).
Aa
Black text reads best on this color (10.61:1).
About this color
#51CF86 is a medium-light, vivid green. In OKLCH its lightness is 77%, its chroma 0.154 and its hue 155°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Seaweed (#18D17B), ΔE 0.030 away. Black text reads best on it, at 10.61:1.
| Hue family | Greens |
| Lightness | medium-light (77%) |
| Chroma | vivid (0.154) |
| Temperature | in between |
| Nearest name | Seaweed (#18D17B) |
| Black text | 10.61:1 |
| White text | 1.97:1 |
Values
| HEX | #51CF86 |
| RGB | rgb(81, 207, 134) |
| HSL | hsl(145, 57%, 56%) |
| OKLCH | oklch(76.6% 0.154 154.7) |
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 #51CF86 | 1.97:1 | Fails | Lc -42.2 | Non-text elements, placeholder text |
| Black text on #51CF86 | 10.61:1 | AAA | Lc 66.1 | Content text, not long reading |
| #51CF86 text on white | 1.97:1 | Fails | Lc 37.8 | Non-text elements, placeholder text |
| #51CF86 text on black | 10.61:1 | AAA | Lc -64.6 | 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
#D4F3DD
oklch(93.6% 0.044 154.6)
-
Step 200
200
#ACEAC0
oklch(88.4% 0.085 154.7)
-
Step 300
300 (this color)
#51CF86
oklch(76.6% 0.154 154.7)
-
Step 400
400
#00BF6D
oklch(70.7% 0.176 154.8)
-
Step 500
500
#00A45D
oklch(63.1% 0.157 154.8)
-
Step 600
600
#008A4D
oklch(55.6% 0.138 154.7)
-
Step 700
700
#007440
oklch(49.1% 0.122 154.8)
-
Step 800
800
#005F33
oklch(42.6% 0.106 154.6)
-
Step 900
900
#004F2A
oklch(37.6% 0.093 154.9)
-
Step 950
950
#003017
oklch(27.1% 0.068 154.6)
#51CF86 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) | #CEBF81 | 0.136 |
| Deuteranopia (no green cones) | #BEB48B | 0.134 |
| Tritanopia (no blue cones) | #1ECDBC | 0.076 |
| Achromatopsia (no color) | #B8B8B8 | 0.155 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #51CF86
#51CF86
oklch(76.6% 0.154 154.7)
- #EE8BDA
#EE8BDA
oklch(76.7% 0.154 334.8)
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 #51CF86, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Seaweed #18D17B ΔE 0.030
- Emerald #06D6A0 ΔE 0.035
- Soft Green #6FC276 ΔE 0.037
- Greenblue #23C48B ΔE 0.043
- Dark Mint #48C072 ΔE 0.045
- Aqua Green #12E193 ΔE 0.048
- Algae Green #21C36F ΔE 0.050
- Dark Mint Green #20C073 ΔE 0.055
Use #51CF86 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.