#57BDFF
Closest named color: Deep Sky Blue (#00BFFF). oklch(76.5% 0.134 240.2), rgb(87, 189, 255).
Aa
Black text reads best on this color (10.12:1).
About this color
#57BDFF is a medium-light, moderately saturated blue. In OKLCH its lightness is 77%, its chroma 0.134 and its hue 240°. Its hue sits on the cool side of the wheel. The nearest named color is Deep Sky Blue (#00BFFF), ΔE 0.031 away. Black text reads best on it, at 10.12:1.
| Hue family | Blues |
| Lightness | medium-light (77%) |
| Chroma | moderately saturated (0.134) |
| Temperature | cool |
| Nearest name | Deep Sky Blue (#00BFFF) |
| Black text | 10.12:1 |
| White text | 2.07:1 |
Values
| HEX | #57BDFF |
| RGB | rgb(87, 189, 255) |
| HSL | hsl(204, 100%, 67%) |
| OKLCH | oklch(76.5% 0.134 240.2) |
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 #57BDFF | 2.07:1 | Fails | Lc -44.8 | Non-text elements, placeholder text |
| Black text on #57BDFF | 10.12:1 | AAA | Lc 63.7 | Content text, not long reading |
| #57BDFF text on white | 2.07:1 | Fails | Lc 40.2 | Non-text elements, placeholder text |
| #57BDFF text on black | 10.12:1 | AAA | Lc -62.1 | 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 300.
-
Step 50
50
#EDF7FF
oklch(97.1% 0.015 241.8)
-
Step 100
100
#D6EEFF
oklch(93.7% 0.034 238.7)
-
Step 200
200
#B4DFFF
oklch(88.4% 0.063 240.6)
-
Step 300
300 (this color)
#57BDFF
oklch(76.5% 0.134 240.2)
-
Step 400
400
#00ABFB
oklch(70.7% 0.163 240.3)
-
Step 500
500
#0092D7
oklch(63% 0.145 240.3)
-
Step 600
600
#007BB6
oklch(55.6% 0.128 240.2)
-
Step 700
700
#00679A
oklch(49.1% 0.113 240.5)
-
Step 800
800
#00547F
oklch(42.6% 0.099 240.7)
-
Step 900
900
#00466B
oklch(37.7% 0.087 240.8)
-
Step 950
950
#002A41
oklch(27.1% 0.061 239)
#57BDFF 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) | #9FBDFF | 0.070 |
| Deuteranopia (no green cones) | #88ADFE | 0.057 |
| Tritanopia (no blue cones) | #00CDD4 | 0.093 |
| Achromatopsia (no color) | #B4B4B4 | 0.134 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #57BDFF
#57BDFF
oklch(76.5% 0.134 240.2)
- #F09D53
#F09D53
oklch(76.5% 0.134 60.3)
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 #57BDFF, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Deep Sky Blue #00BFFF ΔE 0.031
- Vivid Sky Blue #4CC9F0 ΔE 0.045
- Carolina Blue #8AB8FE ΔE 0.046
- Bright Sky Blue #02CCFE ΔE 0.047
- Lightblue #7BC8F6 ΔE 0.049
- Sky #82CAFC ΔE 0.056
- Light Sky Blue #87CEFA ΔE 0.068
- Pastel Blue #A2BFFE ΔE 0.075
Use #57BDFF 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.