#51F3ED
Closest named color: Bright Light Blue (#26F7FD). oklch(88% 0.132 191.4), rgb(81, 243, 237).
Aa
Black text reads best on this color (15.39:1).
About this color
#51F3ED is a light, moderately saturated teal or cyan. In OKLCH its lightness is 88%, its chroma 0.132 and its hue 191°. Its hue sits on the cool side of the wheel. The nearest named color is Bright Light Blue (#26F7FD), ΔE 0.023 away. Black text reads best on it, at 15.39:1.
| Hue family | Teals and cyans |
| Lightness | light (88%) |
| Chroma | moderately saturated (0.132) |
| Temperature | cool |
| Nearest name | Bright Light Blue (#26F7FD) |
| Black text | 15.39:1 |
| White text | 1.36:1 |
Values
| HEX | #51F3ED |
| RGB | rgb(81, 243, 237) |
| HSL | hsl(178, 87%, 64%) |
| OKLCH | oklch(88% 0.132 191.4) |
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 #51F3ED | 1.36:1 | Fails | Lc -20.0 | Dividers and decoration only |
| Black text on #51F3ED | 15.39:1 | AAA | Lc 86.2 | Fine for body text |
| #51F3ED text on white | 1.36:1 | Fails | Lc 17.4 | Dividers and decoration only |
| #51F3ED text on black | 15.39:1 | AAA | Lc -86.2 | 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
#E5FBF9
oklch(97.1% 0.023 190.2)
-
Step 100
100
#C5F5F2
oklch(93.6% 0.049 191.6)
-
Step 200
200 (this color)
#51F3ED
oklch(88% 0.132 191.4)
-
Step 300
300
#00DCD7
oklch(80.8% 0.139 191.8)
-
Step 400
400
#00B8B3
oklch(70.7% 0.122 191.3)
-
Step 500
500
#009E9A
oklch(63.2% 0.109 191.6)
-
Step 600
600
#008581
oklch(55.7% 0.096 191.1)
-
Step 700
700
#00706C
oklch(49.2% 0.085 190.4)
-
Step 800
800
#005B59
oklch(42.6% 0.073 192.2)
-
Step 900
900
#004C4A
oklch(37.6% 0.065 191.7)
-
Step 950
950
#002D2C
oklch(26.9% 0.046 192.5)
#51F3ED 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) | #E5E7ED | 0.139 |
| Deuteranopia (no green cones) | #CDD5EE | 0.131 |
| Tritanopia (no blue cones) | #00FAF1 | 0.023 |
| Achromatopsia (no color) | #DDDDDD | 0.133 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #51F3ED
#51F3ED
oklch(88% 0.132 191.4)
- #FFC7CD
#FFC7CD
oklch(88.1% 0.064 11.3)
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 #51F3ED, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Bright Light Blue #26F7FD ΔE 0.023
- Bright Aqua #0BF9EA ΔE 0.025
- Bright Cyan #41FDFE ΔE 0.029
- Bright Turquoise #0FFEF9 ΔE 0.030
- Cyan #00FFFF ΔE 0.035
- Robin's Egg #6DEDFD ΔE 0.036
- Robin Egg Blue #8AF1FE ΔE 0.049
- Light Turquoise #7EF4CC ΔE 0.051
Use #51F3ED 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.