#51CD8B
Closest named color: Emerald (#06D6A0). oklch(76.2% 0.147 156.8), rgb(81, 205, 139).
Aa
Black text reads best on this color (10.45:1).
About this color
#51CD8B is a medium-light, vivid green. In OKLCH its lightness is 76%, its chroma 0.147 and its hue 157°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Emerald (#06D6A0), ΔE 0.033 away. Black text reads best on it, at 10.45:1.
| Hue family | Greens |
| Lightness | medium-light (76%) |
| Chroma | vivid (0.147) |
| Temperature | in between |
| Nearest name | Emerald (#06D6A0) |
| Black text | 10.45:1 |
| White text | 2.00:1 |
Values
| HEX | #51CD8B |
| RGB | rgb(81, 205, 139) |
| HSL | hsl(148, 55%, 56%) |
| OKLCH | oklch(76.2% 0.147 156.8) |
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 #51CD8B | 2.00:1 | Fails | Lc -43.1 | Non-text elements, placeholder text |
| Black text on #51CD8B | 10.45:1 | AAA | Lc 65.3 | Content text, not long reading |
| #51CD8B text on white | 2.00:1 | Fails | Lc 38.6 | Non-text elements, placeholder text |
| #51CD8B text on black | 10.45:1 | AAA | Lc -63.7 | 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
#EBFAF0
oklch(97.1% 0.021 156.8)
-
Step 100
100
#D4F3DF
oklch(93.6% 0.042 157.2)
-
Step 200
200
#ADEAC4
oklch(88.5% 0.081 157)
-
Step 300
300 (this color)
#51CD8B
oklch(76.2% 0.147 156.8)
-
Step 400
400
#00BF74
oklch(70.8% 0.169 156.8)
-
Step 500
500
#00A463
oklch(63.2% 0.151 156.8)
-
Step 600
600
#008A52
oklch(55.7% 0.134 156.6)
-
Step 700
700
#007444
oklch(49.2% 0.118 156.6)
-
Step 800
800
#005F37
oklch(42.7% 0.102 156.7)
-
Step 900
900
#004F2D
oklch(37.6% 0.09 156.8)
-
Step 950
950
#002F19
oklch(26.9% 0.064 157.1)
#51CD8B 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) | #CCBE87 | 0.134 |
| Deuteranopia (no green cones) | #BBB28F | 0.131 |
| Tritanopia (no blue cones) | #1ACBBC | 0.070 |
| Achromatopsia (no color) | #B7B7B7 | 0.148 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #51CD8B
#51CD8B
oklch(76.2% 0.147 156.8)
- #EC8BD4
#EC8BD4
oklch(76.2% 0.148 336.8)
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 #51CD8B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Emerald #06D6A0 ΔE 0.033
- Soft Green #6FC276 ΔE 0.035
- Greenblue #23C48B ΔE 0.037
- Seaweed #18D17B ΔE 0.037
- Dark Mint #48C072 ΔE 0.044
- Medium Aquamarine #66CDAA ΔE 0.048
- Algae Green #21C36F ΔE 0.051
- Green Blue #01C08D ΔE 0.051
Use #51CD8B 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.