#57CBFF
Closest named color: Vivid Sky Blue (#4CC9F0). oklch(79.7% 0.127 230.8), rgb(87, 203, 255).
Aa
Black text reads best on this color (11.39:1).
About this color
#57CBFF is a light, moderately saturated blue. In OKLCH its lightness is 80%, its chroma 0.127 and its hue 231°. Its hue sits on the cool side of the wheel. The nearest named color is Vivid Sky Blue (#4CC9F0), ΔE 0.024 away. Black text reads best on it, at 11.39:1.
| Hue family | Blues |
| Lightness | light (80%) |
| Chroma | moderately saturated (0.127) |
| Temperature | cool |
| Nearest name | Vivid Sky Blue (#4CC9F0) |
| Black text | 11.39:1 |
| White text | 1.84:1 |
Values
| HEX | #57CBFF |
| RGB | rgb(87, 203, 255) |
| HSL | hsl(199, 100%, 67%) |
| OKLCH | oklch(79.7% 0.127 230.8) |
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 #57CBFF | 1.84:1 | Fails | Lc -38.5 | Non-text elements, placeholder text |
| Black text on #57CBFF | 11.39:1 | AAA | Lc 69.5 | Content text, not long reading |
| #57CBFF text on white | 1.84:1 | Fails | Lc 34.3 | Non-text elements, placeholder text |
| #57CBFF text on black | 11.39:1 | AAA | Lc -68.2 | Content text, not long reading |
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 300.
-
Step 50
50
#EBF8FF
oklch(97.1% 0.017 230.9)
-
Step 100
100
#D2EFFE
oklch(93.6% 0.037 230.2)
-
Step 200
200
#AAE2FF
oklch(88.4% 0.07 231.1)
-
Step 300
300 (this color)
#57CBFF
oklch(79.7% 0.127 230.8)
-
Step 400
400
#00AFE8
oklch(70.7% 0.142 230.7)
-
Step 500
500
#0096C8
oklch(63.1% 0.127 231)
-
Step 600
600
#007EA8
oklch(55.6% 0.112 230.6)
-
Step 700
700
#006A8E
oklch(49.1% 0.099 230.6)
-
Step 800
800
#005775
oklch(42.8% 0.086 230.3)
-
Step 900
900
#004862
oklch(37.7% 0.076 230.8)
-
Step 950
950
#002B3C
oklch(27.1% 0.054 230.4)
#57CBFF 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) | #B1C8FF | 0.087 |
| Deuteranopia (no green cones) | #9AB7FE | 0.076 |
| Tritanopia (no blue cones) | #00D9DC | 0.078 |
| Achromatopsia (no color) | #BFBFBF | 0.127 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #57CBFF
#57CBFF
oklch(79.7% 0.127 230.8)
- #FEA46E
#FEA46E
oklch(79.7% 0.128 51)
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 #57CBFF, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Vivid Sky Blue #4CC9F0 ΔE 0.024
- Bright Sky Blue #02CCFE ΔE 0.028
- Lightblue #7BC8F6 ΔE 0.029
- Sky #82CAFC ΔE 0.034
- Light Sky Blue #87CEFA ΔE 0.042
- Deep Sky Blue #00BFFF ΔE 0.049
- Sky Blue #87CEEB ΔE 0.049
- Aqua Blue #02D8E9 ΔE 0.061
Use #57CBFF 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.