#57BBFF
Closest named color: Deep Sky Blue (#00BFFF). oklch(76.1% 0.135 241.4), rgb(87, 187, 255).
Aa
Black text reads best on this color (9.95:1).
About this color
#57BBFF is a medium-light, moderately saturated blue. In OKLCH its lightness is 76%, its chroma 0.135 and its hue 241°. 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 9.95:1.
| Hue family | Blues |
| Lightness | medium-light (76%) |
| Chroma | moderately saturated (0.135) |
| Temperature | cool |
| Nearest name | Deep Sky Blue (#00BFFF) |
| Black text | 9.95:1 |
| White text | 2.10:1 |
Values
| HEX | #57BBFF |
| RGB | rgb(87, 187, 255) |
| HSL | hsl(204, 100%, 67%) |
| OKLCH | oklch(76.1% 0.135 241.4) |
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 #57BBFF | 2.10:1 | Fails | Lc -45.6 | Large or bold text, headings |
| Black text on #57BBFF | 9.95:1 | AAA | Lc 62.9 | Content text, not long reading |
| #57BBFF text on white | 2.10:1 | Fails | Lc 41.0 | Non-text elements, placeholder text |
| #57BBFF text on black | 9.95:1 | AAA | Lc -61.2 | 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
#EDF7FF
oklch(97.1% 0.015 241.8)
-
Step 100
100
#D7EDFF
oklch(93.5% 0.034 242.7)
-
Step 200
200
#B6DFFF
oklch(88.5% 0.062 241.9)
-
Step 300
300 (this color)
#57BBFF
oklch(76.1% 0.135 241.4)
-
Step 400
400
#00AAFD
oklch(70.6% 0.166 241.4)
-
Step 500
500
#0092DA
oklch(63.1% 0.148 241.4)
-
Step 600
600
#007AB8
oklch(55.5% 0.131 241.7)
-
Step 700
700
#00679C
oklch(49.2% 0.116 241.5)
-
Step 800
800
#005480
oklch(42.6% 0.1 241.3)
-
Step 900
900
#00466C
oklch(37.7% 0.089 241.5)
-
Step 950
950
#002942
oklch(26.9% 0.063 241.6)
#57BBFF 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) | #9CBCFF | 0.068 |
| Deuteranopia (no green cones) | #85ABFE | 0.055 |
| Tritanopia (no blue cones) | #00CCD2 | 0.097 |
| Achromatopsia (no color) | #B2B2B2 | 0.135 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #57BBFF
#57BBFF
oklch(76.1% 0.135 241.4)
- #EE9C4F
#EE9C4F
oklch(76.1% 0.135 61.5)
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 #57BBFF, 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
- Carolina Blue #8AB8FE ΔE 0.046
- Vivid Sky Blue #4CC9F0 ΔE 0.049
- Bright Sky Blue #02CCFE ΔE 0.051
- Lightblue #7BC8F6 ΔE 0.054
- Sky #82CAFC ΔE 0.060
- Light Sky Blue #87CEFA ΔE 0.073
- Pastel Blue #A2BFFE ΔE 0.076
Use #57BBFF 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.