#57A3EC
Closest named color: Cornflower Blue (#6495ED). oklch(69.8% 0.132 249.4), rgb(87, 163, 236).
Aa
Black text reads best on this color (7.85:1).
About this color
#57A3EC is a medium-light, moderately saturated blue. In OKLCH its lightness is 70%, its chroma 0.132 and its hue 249°. Its hue sits on the cool side of the wheel. The nearest named color is Cornflower Blue (#6495ED), ΔE 0.038 away. Black text reads best on it, at 7.85:1.
| Hue family | Blues |
| Lightness | medium-light (70%) |
| Chroma | moderately saturated (0.132) |
| Temperature | cool |
| Nearest name | Cornflower Blue (#6495ED) |
| Black text | 7.85:1 |
| White text | 2.67:1 |
Values
| HEX | #57A3EC |
| RGB | rgb(87, 163, 236) |
| HSL | hsl(209, 80%, 63%) |
| OKLCH | oklch(69.8% 0.132 249.4) |
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 #57A3EC | 2.67:1 | Fails | Lc -56.9 | Large or bold text, headings |
| Black text on #57A3EC | 7.85:1 | AAA | Lc 52.3 | Large or bold text, headings |
| #57A3EC text on white | 2.67:1 | Fails | Lc 51.7 | Large or bold text, headings |
| #57A3EC text on black | 7.85:1 | AAA | Lc -50.2 | 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
#F0F6FD
oklch(97.1% 0.011 252.1)
-
Step 100
100
#DEECFA
oklch(93.7% 0.024 248.1)
-
Step 200
200
#C3DCF7
oklch(88.5% 0.046 250.4)
-
Step 300
300
#98C5F4
oklch(80.8% 0.082 250)
-
Step 400
400 (this color)
#57A3EC
oklch(69.8% 0.132 249.4)
-
Step 500
500
#178DEA
oklch(63.1% 0.169 249.5)
-
Step 600
600
#0076C9
oklch(55.6% 0.155 249.4)
-
Step 700
700
#0063AA
oklch(49.1% 0.137 249.4)
-
Step 800
800
#00518D
oklch(42.7% 0.12 249.5)
-
Step 900
900
#004376
oklch(37.6% 0.105 249.5)
-
Step 950
950
#042847
oklch(27.1% 0.07 249.3)
#57A3EC 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) | #83A6EF | 0.047 |
| Deuteranopia (no green cones) | #6F98EB | 0.034 |
| Tritanopia (no blue cones) | #00B4BD | 0.103 |
| Achromatopsia (no color) | #9E9E9E | 0.132 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #57A3EC
#57A3EC
oklch(69.8% 0.132 249.4)
- #D28D33
#D28D33
oklch(69.8% 0.132 69.1)
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 #57A3EC, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cornflower Blue #6495ED ΔE 0.038
- Chefchaouen Blue #4895EF ΔE 0.043
- Dark Sky Blue #448EE4 ΔE 0.061
- Periwinkle Blue #8F99FB ΔE 0.070
- Soft Blue #6488EA ΔE 0.071
- Deep Sky Blue #00BFFF ΔE 0.075
- Dodger Blue #1E90FF ΔE 0.075
- Perrywinkle #8F8CE7 ΔE 0.080
Use #57A3EC 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.