#51D8AA
Closest named color: Emerald (#06D6A0). oklch(79.6% 0.135 166.9), rgb(81, 216, 170).
Aa
Black text reads best on this color (11.75:1).
About this color
#51D8AA is a light, moderately saturated green. In OKLCH its lightness is 80%, its chroma 0.135 and its hue 167°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Emerald (#06D6A0), ΔE 0.031 away. Black text reads best on it, at 11.75:1.
| Hue family | Greens |
| Lightness | light (80%) |
| Chroma | moderately saturated (0.135) |
| Temperature | in between |
| Nearest name | Emerald (#06D6A0) |
| Black text | 11.75:1 |
| White text | 1.78:1 |
Values
| HEX | #51D8AA |
| RGB | rgb(81, 216, 170) |
| HSL | hsl(160, 63%, 58%) |
| OKLCH | oklch(79.6% 0.135 166.9) |
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 #51D8AA | 1.78:1 | Fails | Lc -36.7 | Non-text elements, placeholder text |
| Black text on #51D8AA | 11.75:1 | AAA | Lc 71.2 | Content text, not long reading |
| #51D8AA text on white | 1.78:1 | Fails | Lc 32.7 | Non-text elements, placeholder text |
| #51D8AA text on black | 11.75:1 | AAA | Lc -70.0 | 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
#EBFAF3
oklch(97.2% 0.018 166.4)
-
Step 100
100
#D2F3E4
oklch(93.6% 0.04 166.3)
-
Step 200
200
#A9EACF
oklch(88.6% 0.076 167)
-
Step 300
300 (this color)
#51D8AA
oklch(79.6% 0.135 166.9)
-
Step 400
400
#00BC8D
oklch(70.6% 0.145 167)
-
Step 500
500
#00A279
oklch(63.2% 0.13 167)
-
Step 600
600
#008865
oklch(55.6% 0.114 167)
-
Step 700
700
#007254
oklch(49% 0.101 166.9)
-
Step 800
800
#005E45
oklch(42.8% 0.088 167.1)
-
Step 900
900
#004E39
oklch(37.6% 0.077 167.4)
-
Step 950
950
#002F21
oklch(27.1% 0.055 167.3)
#51D8AA 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) | #D3CAA8 | 0.135 |
| Deuteranopia (no green cones) | #C0BCAD | 0.131 |
| Tritanopia (no blue cones) | #00D9CB | 0.047 |
| Achromatopsia (no color) | #C2C2C2 | 0.137 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #51D8AA
#51D8AA
oklch(79.6% 0.135 166.9)
- #FB97CD
#FB97CD
oklch(79.5% 0.136 347)
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 #51D8AA, closest first.
No curated palette has a color within ΔE 0.04 of #51D8AA.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Emerald #06D6A0 ΔE 0.031
- Medium Aquamarine #66CDAA ΔE 0.033
- Seafoam Blue #78D1B6 ΔE 0.042
- Aqua Marine #2EE8BB ΔE 0.043
- Turquoise #40E0D0 ΔE 0.050
- Aqua Green #12E193 ΔE 0.052
- Pale Teal #82CBB2 ΔE 0.055
- Medium Turquoise #48D1CC ΔE 0.058
Use #51D8AA 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.