#57BBFD
Closest named color: Deep Sky Blue (#00BFFF). oklch(76% 0.133 240.6), rgb(87, 187, 253).
Aa
Black text reads best on this color (9.93:1).
About this color
#57BBFD is a medium-light, moderately saturated blue. In OKLCH its lightness is 76%, its chroma 0.133 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 9.93:1.
| Hue family | Blues |
| Lightness | medium-light (76%) |
| Chroma | moderately saturated (0.133) |
| Temperature | cool |
| Nearest name | Deep Sky Blue (#00BFFF) |
| Black text | 9.93:1 |
| White text | 2.11:1 |
Values
| HEX | #57BBFD |
| RGB | rgb(87, 187, 253) |
| HSL | hsl(204, 98%, 67%) |
| OKLCH | oklch(76% 0.133 240.6) |
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 #57BBFD | 2.11:1 | Fails | Lc -45.8 | Large or bold text, headings |
| Black text on #57BBFD | 9.93:1 | AAA | Lc 62.8 | Content text, not long reading |
| #57BBFD text on white | 2.11:1 | Fails | Lc 41.1 | Non-text elements, placeholder text |
| #57BBFD 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 300.
-
Step 50
50
#EDF7FF
oklch(97.1% 0.015 241.8)
-
Step 100
100
#D6EDFF
oklch(93.5% 0.035 241.5)
-
Step 200
200
#B5DFFF
oklch(88.4% 0.062 241.2)
-
Step 300
300 (this color)
#57BBFD
oklch(76% 0.133 240.6)
-
Step 400
400
#00ABFC
oklch(70.8% 0.164 240.7)
-
Step 500
500
#0092D8
oklch(63% 0.146 240.6)
-
Step 600
600
#007BB7
oklch(55.7% 0.129 240.7)
-
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
#002942
oklch(26.9% 0.063 241.6)
#57BBFD 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) | #9DBBFF | 0.069 |
| Deuteranopia (no green cones) | #86ABFC | 0.056 |
| Tritanopia (no blue cones) | #00CBD2 | 0.093 |
| Achromatopsia (no color) | #B2B2B2 | 0.133 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #57BBFD
#57BBFD
oklch(76% 0.133 240.6)
- #EE9C51
#EE9C51
oklch(76.1% 0.133 61)
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 #57BBFD, 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 0.047
- Vivid Sky Blue #4CC9F0 ΔE 0.048
- Bright Sky Blue #02CCFE ΔE 0.050
- Lightblue #7BC8F6 ΔE 0.053
- Sky #82CAFC ΔE 0.060
- Light Sky Blue #87CEFA ΔE 0.072
- Pastel Blue #A2BFFE ΔE 0.077
Use #57BBFD 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.