#51FAFB
Closest named color: Bright Cyan (#41FDFE). oklch(90.1% 0.135 195.6), rgb(81, 250, 251).
Aa
Black text reads best on this color (16.41:1).
About this color
#51FAFB is a very light, moderately saturated teal or cyan. In OKLCH its lightness is 90%, its chroma 0.135 and its hue 196°. Its hue sits on the cool side of the wheel. The nearest named color is Bright Cyan (#41FDFE), ΔE 0.009 away. Black text reads best on it, at 16.41:1.
| Hue family | Teals and cyans |
| Lightness | very light (90%) |
| Chroma | moderately saturated (0.135) |
| Temperature | cool |
| Nearest name | Bright Cyan (#41FDFE) |
| Black text | 16.41:1 |
| White text | 1.27:1 |
Values
| HEX | #51FAFB |
| RGB | rgb(81, 250, 251) |
| HSL | hsl(180, 96%, 65%) |
| OKLCH | oklch(90.1% 0.135 195.6) |
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 #51FAFB | 1.27:1 | Fails | Lc -15.5 | Dividers and decoration only |
| Black text on #51FAFB | 16.41:1 | AAA | Lc 90.2 | Preferred for body text |
| #51FAFB text on white | 1.27:1 | Fails | Lc 13.4 | Not readable |
| #51FAFB text on black | 16.41:1 | AAA | Lc -90.4 | Preferred 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
#C4F5F5
oklch(93.6% 0.05 196.3)
-
Step 200
200 (this color)
#51FAFB
oklch(90.1% 0.135 195.6)
-
Step 300
300
#00DCDD
oklch(81% 0.138 195.4)
-
Step 400
400
#00B7B8
oklch(70.6% 0.12 195.5)
-
Step 500
500
#009D9E
oklch(63.1% 0.108 195.6)
-
Step 600
600
#008485
oklch(55.6% 0.095 195.7)
-
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
#004C4C
oklch(37.7% 0.064 194.8)
-
Step 950
950
#002D2E
oklch(27% 0.046 197.1)
#51FAFB 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) | #EAEEFB | 0.141 |
| Deuteranopia (no green cones) | #D0DBFC | 0.132 |
| Tritanopia (no blue cones) | #00FFFA | 0.022 |
| Achromatopsia (no color) | #E3E3E3 | 0.136 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #51FAFB
#51FAFB
oklch(90.1% 0.135 195.6)
- #FFD1D3
#FFD1D3
oklch(90.1% 0.052 15.2)
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 #51FAFB, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Bright Cyan #41FDFE ΔE 0.009
- Bright Light Blue #26F7FD ΔE 0.018
- Cyan #00FFFF ΔE 0.020
- Bright Turquoise #0FFEF9 ΔE 0.020
- Bright Aqua #0BF9EA ΔE 0.033
- Robin's Egg #6DEDFD ΔE 0.038
- Robin Egg Blue #8AF1FE ΔE 0.043
- Robin's Egg Blue #98EFF9 ΔE 0.053
Use #51FAFB 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.