#51F4EB
Closest named color: Bright Aqua (#0BF9EA). oklch(88.2% 0.133 189.7), rgb(81, 244, 235).
Aa
Black text reads best on this color (15.48:1).
About this color
#51F4EB is a light, moderately saturated teal or cyan. In OKLCH its lightness is 88%, its chroma 0.133 and its hue 190°. Its hue sits on the cool side of the wheel. The nearest named color is Bright Aqua (#0BF9EA), ΔE 0.022 away. Black text reads best on it, at 15.48:1.
| Hue family | Teals and cyans |
| Lightness | light (88%) |
| Chroma | moderately saturated (0.133) |
| Temperature | cool |
| Nearest name | Bright Aqua (#0BF9EA) |
| Black text | 15.48:1 |
| White text | 1.35:1 |
Values
| HEX | #51F4EB |
| RGB | rgb(81, 244, 235) |
| HSL | hsl(177, 88%, 64%) |
| OKLCH | oklch(88.2% 0.133 189.7) |
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 #51F4EB | 1.35:1 | Fails | Lc -19.5 | Dividers and decoration only |
| Black text on #51F4EB | 15.48:1 | AAA | Lc 86.6 | Fine for body text |
| #51F4EB text on white | 1.35:1 | Fails | Lc 17.0 | Dividers and decoration only |
| #51F4EB text on black | 15.48:1 | AAA | Lc -86.6 | 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
#C5F5F1
oklch(93.6% 0.049 190.1)
-
Step 200
200 (this color)
#51F4EB
oklch(88.2% 0.133 189.7)
-
Step 300
300
#00DDD4
oklch(81% 0.14 189.6)
-
Step 400
400
#00B8B1
oklch(70.6% 0.122 190)
-
Step 500
500
#009E98
oklch(63.1% 0.109 190)
-
Step 600
600
#00857F
oklch(55.6% 0.096 189.2)
-
Step 700
700
#00706B
oklch(49.2% 0.085 189.4)
-
Step 800
800
#005C58
oklch(42.8% 0.074 189.6)
-
Step 900
900
#004C49
oklch(37.6% 0.065 190.2)
-
Step 950
950
#002E2B
oklch(27.1% 0.047 188)
#51F4EB 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) | #E6E8EB | 0.140 |
| Deuteranopia (no green cones) | #CED6EC | 0.132 |
| Tritanopia (no blue cones) | #00FAF1 | 0.021 |
| Achromatopsia (no color) | #DDDDDD | 0.134 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #51F4EB
#51F4EB
oklch(88.2% 0.133 189.7)
- #FFC7CF
#FFC7CF
oklch(88.1% 0.065 8.9)
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 #51F4EB, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Bright Aqua #0BF9EA ΔE 0.022
- Bright Light Blue #26F7FD ΔE 0.025
- Bright Turquoise #0FFEF9 ΔE 0.029
- Bright Cyan #41FDFE ΔE 0.029
- Cyan #00FFFF ΔE 0.034
- Robin's Egg #6DEDFD ΔE 0.040
- Light Turquoise #7EF4CC ΔE 0.047
- Robin Egg Blue #8AF1FE ΔE 0.051
Use #51F4EB 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.