#57BDEF
Closest named color: Vivid Sky Blue (#4CC9F0). oklch(75.8% 0.118 232.7), rgb(87, 189, 239).
Aa
Black text reads best on this color (9.93:1).
About this color
#57BDEF is a medium-light, moderately saturated blue. In OKLCH its lightness is 76%, its chroma 0.118 and its hue 233°. Its hue sits on the cool side of the wheel. The nearest named color is Vivid Sky Blue (#4CC9F0), ΔE 0.033 away. Black text reads best on it, at 9.93:1.
| Hue family | Blues |
| Lightness | medium-light (76%) |
| Chroma | moderately saturated (0.118) |
| Temperature | cool |
| Nearest name | Vivid Sky Blue (#4CC9F0) |
| Black text | 9.93:1 |
| White text | 2.11:1 |
Values
| HEX | #57BDEF |
| RGB | rgb(87, 189, 239) |
| HSL | hsl(200, 83%, 64%) |
| OKLCH | oklch(75.8% 0.118 232.7) |
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 #57BDEF | 2.11:1 | Fails | Lc -45.8 | Large or bold text, headings |
| Black text on #57BDEF | 9.93:1 | AAA | Lc 62.8 | Content text, not long reading |
| #57BDEF text on white | 2.11:1 | Fails | Lc 41.2 | Non-text elements, placeholder text |
| #57BDEF text on black | 9.93:1 | AAA | Lc -61.1 | 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 400.
-
Step 50
50
#EFF7FB
oklch(97.1% 0.01 228.9)
-
Step 100
100
#DDEDF6
oklch(93.7% 0.021 232.1)
-
Step 200
200
#BFDFF0
oklch(88.6% 0.041 231)
-
Step 300
300
#90CAE9
oklch(81% 0.074 232.2)
-
Step 400
400 (this color)
#57BDEF
oklch(75.8% 0.118 232.7)
-
Step 500
500
#0095CA
oklch(63% 0.13 232.7)
-
Step 600
600
#007DAB
oklch(55.5% 0.115 233.2)
-
Step 700
700
#006990
oklch(49% 0.101 232.9)
-
Step 800
800
#005677
oklch(42.6% 0.088 233.1)
-
Step 900
900
#004864
oklch(37.8% 0.078 232.8)
-
Step 950
950
#002B3D
oklch(27.1% 0.055 231.9)
#57BDEF 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) | #A4BBF1 | 0.077 |
| Deuteranopia (no green cones) | #8FABEE | 0.067 |
| Tritanopia (no blue cones) | #00CACE | 0.076 |
| Achromatopsia (no color) | #B2B2B2 | 0.119 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #57BDEF
#57BDEF
oklch(75.8% 0.118 232.7)
- #EB9A67
#EB9A67
oklch(75.7% 0.118 52.3)
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 #57BDEF, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Vivid Sky Blue #4CC9F0 ΔE 0.033
- Deep Sky Blue #00BFFF ΔE 0.035
- Bright Sky Blue #02CCFE ΔE 0.044
- Lightblue #7BC8F6 ΔE 0.046
- Carolina Blue #8AB8FE ΔE 0.056
- Sky #82CAFC ΔE 0.057
- Light Sky Blue #87CEFA ΔE 0.068
- Sky Blue #87CEEB ΔE 0.069
Use #57BDEF 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.