#51EFEC
Closest named color: Bright Light Blue (#26F7FD). oklch(87.1% 0.129 193.2), rgb(81, 239, 236).
Aa
Black text reads best on this color (14.90:1).
About this color
#51EFEC is a light, moderately saturated teal or cyan. In OKLCH its lightness is 87%, its chroma 0.129 and its hue 193°. Its hue sits on the cool side of the wheel. The nearest named color is Bright Light Blue (#26F7FD), ΔE 0.027 away. Black text reads best on it, at 14.90:1.
| Hue family | Teals and cyans |
| Lightness | light (87%) |
| Chroma | moderately saturated (0.129) |
| Temperature | cool |
| Nearest name | Bright Light Blue (#26F7FD) |
| Black text | 14.90:1 |
| White text | 1.40:1 |
Values
| HEX | #51EFEC |
| RGB | rgb(81, 239, 236) |
| HSL | hsl(179, 83%, 63%) |
| OKLCH | oklch(87.1% 0.129 193.2) |
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 #51EFEC | 1.40:1 | Fails | Lc -22.1 | Dividers and decoration only |
| Black text on #51EFEC | 14.90:1 | AAA | Lc 84.3 | Fine for body text |
| #51EFEC text on white | 1.40:1 | Fails | Lc 19.4 | Dividers and decoration only |
| #51EFEC text on black | 14.90:1 | AAA | Lc -84.1 | 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
#E5FBFA
oklch(97.2% 0.023 193.5)
-
Step 100
100
#C6F5F3
oklch(93.7% 0.048 193.2)
-
Step 200
200 (this color)
#51EFEC
oklch(87.1% 0.129 193.2)
-
Step 300
300
#00DCD9
oklch(80.9% 0.139 193)
-
Step 400
400
#00B8B5
oklch(70.8% 0.121 192.7)
-
Step 500
500
#009E9C
oklch(63.2% 0.108 193.2)
-
Step 600
600
#008483
oklch(55.5% 0.095 193.8)
-
Step 700
700
#006F6E
oklch(49% 0.084 193.7)
-
Step 800
800
#005B5A
oklch(42.6% 0.073 193.5)
-
Step 900
900
#004C4B
oklch(37.7% 0.064 193.2)
-
Step 950
950
#002D2D
oklch(26.9% 0.046 194.8)
#51EFEC 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) | #E1E3EC | 0.137 |
| Deuteranopia (no green cones) | #C9D2ED | 0.127 |
| Tritanopia (no blue cones) | #00F6EE | 0.024 |
| Achromatopsia (no color) | #D9D9D9 | 0.130 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #51EFEC
#51EFEC
oklch(87.1% 0.129 193.2)
- #FFC2C7
#FFC2C7
oklch(87% 0.07 13.1)
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 #51EFEC, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Bright Light Blue #26F7FD ΔE 0.027
- Bright Aqua #0BF9EA ΔE 0.032
- Robin's Egg #6DEDFD ΔE 0.033
- Bright Cyan #41FDFE ΔE 0.038
- Bright Turquoise #0FFEF9 ΔE 0.039
- Cyan #00FFFF ΔE 0.043
- Robin Egg Blue #8AF1FE ΔE 0.050
- Turquoise #40E0D0 ΔE 0.052
Use #51EFEC 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.