#51E2E4
Closest named color: Turquoise (#40E0D0). oklch(83.7% 0.121 196.4), rgb(81, 226, 228).
Aa
Black text reads best on this color (13.34:1).
About this color
#51E2E4 is a light, moderately saturated teal or cyan. In OKLCH its lightness is 84%, its chroma 0.121 and its hue 196°. Its hue sits on the cool side of the wheel. The nearest named color is Turquoise (#40E0D0), ΔE 0.031 away. Black text reads best on it, at 13.34:1.
| Hue family | Teals and cyans |
| Lightness | light (84%) |
| Chroma | moderately saturated (0.121) |
| Temperature | cool |
| Nearest name | Turquoise (#40E0D0) |
| Black text | 13.34:1 |
| White text | 1.57:1 |
Values
| HEX | #51E2E4 |
| RGB | rgb(81, 226, 228) |
| HSL | hsl(181, 73%, 61%) |
| OKLCH | oklch(83.7% 0.121 196.4) |
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 #51E2E4 | 1.57:1 | Fails | Lc -29.2 | Dividers and decoration only |
| Black text on #51E2E4 | 13.34:1 | AAA | Lc 78.0 | Fine for body text |
| #51E2E4 text on white | 1.57:1 | Fails | Lc 25.8 | Dividers and decoration only |
| #51E2E4 text on black | 13.34:1 | AAA | Lc -77.3 | 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
#EAF9F9
oklch(97.1% 0.016 196.9)
-
Step 100
100
#D0F2F2
oklch(93.7% 0.035 196.6)
-
Step 200
200
#A4E8E8
oklch(88.6% 0.068 196)
-
Step 300
300 (this color)
#51E2E4
oklch(83.7% 0.121 196.4)
-
Step 400
400
#00B7BA
oklch(70.7% 0.12 196.9)
-
Step 500
500
#009D9F
oklch(63.1% 0.107 196.4)
-
Step 600
600
#008486
oklch(55.6% 0.095 196.7)
-
Step 700
700
#006F70
oklch(49.1% 0.084 195.9)
-
Step 800
800
#005B5C
oklch(42.7% 0.073 196.1)
-
Step 900
900
#004C4D
oklch(37.8% 0.064 196.3)
-
Step 950
950
#002D2E
oklch(27% 0.046 197.1)
#51E2E4 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) | #D3D8E4 | 0.125 |
| Deuteranopia (no green cones) | #BDC7E5 | 0.118 |
| Tritanopia (no blue cones) | #00E9E2 | 0.028 |
| Achromatopsia (no color) | #CECECE | 0.122 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #51E2E4
#51E2E4
oklch(83.7% 0.121 196.4)
- #FFB2B5
#FFB2B5
oklch(83.7% 0.09 16.6)
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 #51E2E4, closest first.
No curated palette has a color within ΔE 0.04 of #51E2E4.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Turquoise #40E0D0 ΔE 0.031
- Aqua Blue #02D8E9 ΔE 0.041
- Robin's Egg #6DEDFD ΔE 0.048
- Medium Turquoise #48D1CC ΔE 0.052
- Bright Light Blue #26F7FD ΔE 0.057
- Bright Aqua #0BF9EA ΔE 0.061
- Light Teal #90E4C1 ΔE 0.065
- Seafoam Blue #78D1B6 ΔE 0.066
Use #51E2E4 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.