#57AFEF
Closest named color: Deep Sky Blue (#00BFFF). oklch(72.6% 0.126 242.8), rgb(87, 175, 239).
Aa
Black text reads best on this color (8.78:1).
About this color
#57AFEF is a medium-light, moderately saturated blue. In OKLCH its lightness is 73%, its chroma 0.126 and its hue 243°. Its hue sits on the cool side of the wheel. The nearest named color is Deep Sky Blue (#00BFFF), ΔE 0.048 away. Black text reads best on it, at 8.78:1.
| Hue family | Blues |
| Lightness | medium-light (73%) |
| Chroma | moderately saturated (0.126) |
| Temperature | cool |
| Nearest name | Deep Sky Blue (#00BFFF) |
| Black text | 8.78:1 |
| White text | 2.39:1 |
Values
| HEX | #57AFEF |
| RGB | rgb(87, 175, 239) |
| HSL | hsl(205, 83%, 64%) |
| OKLCH | oklch(72.6% 0.126 242.8) |
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 #57AFEF | 2.39:1 | Fails | Lc -51.8 | Large or bold text, headings |
| Black text on #57AFEF | 8.78:1 | AAA | Lc 57.1 | Large or bold text, headings |
| #57AFEF text on white | 2.39:1 | Fails | Lc 46.9 | Large or bold text, headings |
| #57AFEF text on black | 8.78:1 | AAA | Lc -55.2 | Large or bold text, headings |
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 400.
-
Step 50
50
#F0F6FC
oklch(97% 0.01 247.9)
-
Step 100
100
#DDECF8
oklch(93.5% 0.023 241.9)
-
Step 200
200
#C1DDF4
oklch(88.4% 0.044 243)
-
Step 300
300
#94C7F0
oklch(80.9% 0.079 243.2)
-
Step 400
400 (this color)
#57AFEF
oklch(72.6% 0.126 242.8)
-
Step 500
500
#0091DD
oklch(63.1% 0.152 242.9)
-
Step 600
600
#007ABA
oklch(55.6% 0.133 242.5)
-
Step 700
700
#00669E
oklch(49% 0.119 243.2)
-
Step 800
800
#005482
oklch(42.8% 0.102 242.4)
-
Step 900
900
#00466D
oklch(37.8% 0.09 242.2)
-
Step 950
950
#002943
oklch(27% 0.065 242.6)
#57AFEF 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) | #92B0F2 | 0.061 |
| Deuteranopia (no green cones) | #7EA1EE | 0.049 |
| Tritanopia (no blue cones) | #00BFC5 | 0.094 |
| Achromatopsia (no color) | #A8A8A8 | 0.126 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #57AFEF
#57AFEF
oklch(72.6% 0.126 242.8)
- #DE944B
#DE944B
oklch(72.7% 0.126 63.1)
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 #57AFEF, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Deep Sky Blue #00BFFF ΔE 0.048
- Carolina Blue #8AB8FE ΔE 0.062
- Cornflower Blue #6495ED ΔE 0.069
- Vivid Sky Blue #4CC9F0 ΔE 0.071
- Chefchaouen Blue #4895EF ΔE 0.074
- Bright Sky Blue #02CCFE ΔE 0.077
- Turquoise Blue #06B1C4 ΔE 0.079
- Lightblue #7BC8F6 ΔE 0.079
Use #57AFEF 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.