#51E4D3
Closest named color: Turquoise (#40E0D0). oklch(83.7% 0.126 184.2), rgb(81, 228, 211).
Aa
Black text reads best on this color (13.38:1).
About this color
#51E4D3 is a light, moderately saturated teal or cyan. In OKLCH its lightness is 84%, its chroma 0.126 and its hue 184°. Its hue sits on the cool side of the wheel. The nearest named color is Turquoise (#40E0D0), ΔE 0.015 away. Black text reads best on it, at 13.38:1.
| Hue family | Teals and cyans |
| Lightness | light (84%) |
| Chroma | moderately saturated (0.126) |
| Temperature | cool |
| Nearest name | Turquoise (#40E0D0) |
| Black text | 13.38:1 |
| White text | 1.56:1 |
Values
| HEX | #51E4D3 |
| RGB | rgb(81, 228, 211) |
| HSL | hsl(173, 73%, 61%) |
| OKLCH | oklch(83.7% 0.126 184.2) |
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 #51E4D3 | 1.56:1 | Fails | Lc -29.0 | Dividers and decoration only |
| Black text on #51E4D3 | 13.38:1 | AAA | Lc 78.2 | Fine for body text |
| #51E4D3 text on white | 1.56:1 | Fails | Lc 25.6 | Dividers and decoration only |
| #51E4D3 text on black | 13.38:1 | AAA | Lc -77.5 | Fine for body text |
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
#EAF9F7
oklch(97% 0.016 187.3)
-
Step 100
100
#D0F2ED
oklch(93.5% 0.036 185.8)
-
Step 200
200
#A4E9DE
oklch(88.5% 0.071 183.7)
-
Step 300
300 (this color)
#51E4D3
oklch(83.7% 0.126 184.2)
-
Step 400
400
#00B9AA
oklch(70.6% 0.125 184.7)
-
Step 500
500
#009F91
oklch(63.1% 0.112 184)
-
Step 600
600
#00867A
oklch(55.7% 0.099 183.9)
-
Step 700
700
#007066
oklch(49% 0.087 184.2)
-
Step 800
800
#005C54
oklch(42.7% 0.075 184.7)
-
Step 900
900
#004D46
oklch(37.8% 0.067 184.5)
-
Step 950
950
#002E29
oklch(27.1% 0.048 183.6)
#51E4D3 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) | #D9D8D2 | 0.133 |
| Deuteranopia (no green cones) | #C4C8D5 | 0.127 |
| Tritanopia (no blue cones) | #00E9DF | 0.024 |
| Achromatopsia (no color) | #CECECE | 0.127 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #51E4D3
#51E4D3
oklch(83.7% 0.126 184.2)
- #FFB0C2
#FFB0C2
oklch(83.7% 0.095 4.4)
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 #51E4D3, closest first.
No curated palette has a color within ΔE 0.04 of #51E4D3.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Turquoise #40E0D0 ΔE 0.015
- Aqua Marine #2EE8BB ΔE 0.043
- Light Teal #90E4C1 ΔE 0.050
- Medium Turquoise #48D1CC ΔE 0.053
- Seafoam Blue #78D1B6 ΔE 0.055
- Bright Aqua #0BF9EA ΔE 0.056
- Aqua Blue #02D8E9 ΔE 0.058
- Light Turquoise #7EF4CC ΔE 0.060
Use #51E4D3 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.