#57ACEE
Closest named color: Deep Sky Blue (#00BFFF). oklch(71.9% 0.127 244.4), rgb(87, 172, 238).
Aa
Black text reads best on this color (8.54:1).
About this color
#57ACEE is a medium-light, moderately saturated blue. In OKLCH its lightness is 72%, its chroma 0.127 and its hue 244°. Its hue sits on the cool side of the wheel. The nearest named color is Deep Sky Blue (#00BFFF), ΔE 0.054 away. Black text reads best on it, at 8.54:1.
| Hue family | Blues |
| Lightness | medium-light (72%) |
| Chroma | moderately saturated (0.127) |
| Temperature | cool |
| Nearest name | Deep Sky Blue (#00BFFF) |
| Black text | 8.54:1 |
| White text | 2.45:1 |
Values
| HEX | #57ACEE |
| RGB | rgb(87, 172, 238) |
| HSL | hsl(206, 82%, 64%) |
| OKLCH | oklch(71.9% 0.127 244.4) |
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 #57ACEE | 2.45:1 | Fails | Lc -53.1 | Large or bold text, headings |
| Black text on #57ACEE | 8.54:1 | AAA | Lc 55.9 | Large or bold text, headings |
| #57ACEE text on white | 2.45:1 | Fails | Lc 48.1 | Large or bold text, headings |
| #57ACEE text on black | 8.54:1 | AAA | Lc -53.9 | 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
#DEECF9
oklch(93.6% 0.023 246)
-
Step 200
200
#C1DDF5
oklch(88.5% 0.045 244.2)
-
Step 300
300
#95C7F1
oklch(81% 0.079 244.3)
-
Step 400
400 (this color)
#57ACEE
oklch(71.9% 0.127 244.4)
-
Step 500
500
#0090E0
oklch(63% 0.157 244.4)
-
Step 600
600
#0079BE
oklch(55.6% 0.139 244.6)
-
Step 700
700
#0066A0
oklch(49.2% 0.121 244)
-
Step 800
800
#005384
oklch(42.6% 0.106 244.3)
-
Step 900
900
#00456F
oklch(37.6% 0.093 244.3)
-
Step 950
950
#002944
oklch(27% 0.066 243.6)
#57ACEE 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) | #8FADF1 | 0.058 |
| Deuteranopia (no green cones) | #7A9FED | 0.045 |
| Tritanopia (no blue cones) | #00BCC3 | 0.095 |
| Achromatopsia (no color) | #A5A5A5 | 0.127 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #57ACEE
#57ACEE
oklch(71.9% 0.127 244.4)
- #DB9246
#DB9246
oklch(71.9% 0.127 64.3)
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 #57ACEE, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Deep Sky Blue #00BFFF ΔE 0.054
- Cornflower Blue #6495ED ΔE 0.061
- Chefchaouen Blue #4895EF ΔE 0.066
- Carolina Blue #8AB8FE ΔE 0.067
- Periwinkle Blue #8F99FB ΔE 0.079
- Vivid Sky Blue #4CC9F0 ΔE 0.079
- Turquoise Blue #06B1C4 ΔE 0.080
- Greyblue #77A1B5 ΔE 0.083
Use #57ACEE 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.