#57A3FF
Closest named color: Cornflower Blue (#6495ED). oklch(70.8% 0.155 254.5), rgb(87, 163, 255).
Aa
Black text reads best on this color (8.08:1).
About this color
#57A3FF is a medium-light, vivid blue. In OKLCH its lightness is 71%, its chroma 0.155 and its hue 255°. Its hue sits on the cool side of the wheel. The nearest named color is Cornflower Blue (#6495ED), ΔE 0.041 away. Black text reads best on it, at 8.08:1.
| Hue family | Blues |
| Lightness | medium-light (71%) |
| Chroma | vivid (0.155) |
| Temperature | cool |
| Nearest name | Cornflower Blue (#6495ED) |
| Black text | 8.08:1 |
| White text | 2.59:1 |
Values
| HEX | #57A3FF |
| RGB | rgb(87, 163, 255) |
| HSL | hsl(213, 100%, 67%) |
| OKLCH | oklch(70.8% 0.155 254.5) |
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 #57A3FF | 2.59:1 | Fails | Lc -55.6 | Large or bold text, headings |
| Black text on #57A3FF | 8.08:1 | AAA | Lc 53.6 | Large or bold text, headings |
| #57A3FF text on white | 2.59:1 | Fails | Lc 50.4 | Large or bold text, headings |
| #57A3FF text on black | 8.08:1 | AAA | Lc -51.5 | 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
#F0F6FE
oklch(97.1% 0.012 255.5)
-
Step 100
100
#DEEBFD
oklch(93.6% 0.028 256.5)
-
Step 200
200
#C2DCFD
oklch(88.6% 0.054 254.5)
-
Step 300
300
#95C4FF
oklch(80.9% 0.098 254.5)
-
Step 400
400 (this color)
#57A3FF
oklch(70.8% 0.155 254.5)
-
Step 500
500
#1188FD
oklch(63.2% 0.198 254.4)
-
Step 600
600
#0071D9
oklch(55.6% 0.181 254.6)
-
Step 700
700
#005FB7
oklch(49.1% 0.158 254.4)
-
Step 800
800
#004E98
oklch(42.8% 0.138 254.3)
-
Step 900
900
#004080
oklch(37.6% 0.123 254.7)
-
Step 950
950
#03264D
oklch(27% 0.082 254.4)
#57A3FF 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) | #7AA9FF | 0.040 |
| Deuteranopia (no green cones) | #6299FD | 0.026 |
| Tritanopia (no blue cones) | #00B8C5 | 0.122 |
| Achromatopsia (no color) | #A1A1A1 | 0.155 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #57A3FF
#57A3FF
oklch(70.8% 0.155 254.5)
- #D79100
#D79100
oklch(70.9% 0.15 74.7)
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 #57A3FF, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cornflower Blue #6495ED ΔE 0.041
- Chefchaouen Blue #4895EF ΔE 0.045
- Periwinkle Blue #8F99FB ΔE 0.062
- Dodger Blue #1E90FF ΔE 0.067
- Dark Sky Blue #448EE4 ΔE 0.068
- Soft Blue #6488EA ΔE 0.071
- Deep Sky Blue #00BFFF ΔE 0.077
- Perrywinkle #8F8CE7 ΔE 0.081
Use #57A3FF 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.