#51EFDE
Closest named color: Bright Aqua (#0BF9EA). oklch(86.6% 0.132 184.8), rgb(81, 239, 222).
Aa
Black text reads best on this color (14.75:1).
About this color
#51EFDE is a light, moderately saturated teal or cyan. In OKLCH its lightness is 87%, its chroma 0.132 and its hue 185°. Its hue sits on the cool side of the wheel. The nearest named color is Bright Aqua (#0BF9EA), ΔE 0.029 away. Black text reads best on it, at 14.75:1.
| Hue family | Teals and cyans |
| Lightness | light (87%) |
| Chroma | moderately saturated (0.132) |
| Temperature | cool |
| Nearest name | Bright Aqua (#0BF9EA) |
| Black text | 14.75:1 |
| White text | 1.42:1 |
Values
| HEX | #51EFDE |
| RGB | rgb(81, 239, 222) |
| HSL | hsl(174, 83%, 63%) |
| OKLCH | oklch(86.6% 0.132 184.8) |
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 #51EFDE | 1.42:1 | Fails | Lc -22.8 | Dividers and decoration only |
| Black text on #51EFDE | 14.75:1 | AAA | Lc 83.7 | Fine for body text |
| #51EFDE text on white | 1.42:1 | Fails | Lc 20.0 | Dividers and decoration only |
| #51EFDE text on black | 14.75:1 | AAA | Lc -83.4 | 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 200.
-
Step 50
50
#E6FBF7
oklch(97.2% 0.023 183.2)
-
Step 100
100
#C6F5EE
oklch(93.5% 0.049 185.3)
-
Step 200
200 (this color)
#51EFDE
oklch(86.6% 0.132 184.8)
-
Step 300
300
#00DECC
oklch(81% 0.143 184.6)
-
Step 400
400
#00B9AA
oklch(70.6% 0.125 184.7)
-
Step 500
500
#009F92
oklch(63.2% 0.111 184.7)
-
Step 600
600
#00867B
oklch(55.7% 0.098 184.8)
-
Step 700
700
#007067
oklch(49% 0.086 185.2)
-
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)
#51EFDE 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) | #E3E2DD | 0.140 |
| Deuteranopia (no green cones) | #CCD1E0 | 0.133 |
| Tritanopia (no blue cones) | #00F4EA | 0.023 |
| Achromatopsia (no color) | #D8D8D8 | 0.133 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #51EFDE
#51EFDE
oklch(86.6% 0.132 184.8)
- #FFBFCC
#FFBFCC
oklch(86.6% 0.075 5.3)
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 #51EFDE, closest first.
No curated palette has a color within ΔE 0.04 of #51EFDE.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Bright Aqua #0BF9EA ΔE 0.029
- Bright Light Blue #26F7FD ΔE 0.041
- Light Turquoise #7EF4CC ΔE 0.042
- Turquoise #40E0D0 ΔE 0.044
- Bright Turquoise #0FFEF9 ΔE 0.045
- Bright Cyan #41FDFE ΔE 0.048
- Robin's Egg #6DEDFD ΔE 0.051
- Cyan #00FFFF ΔE 0.051
Use #51EFDE 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.