#57AAF2
Closest named color: Cornflower Blue (#6495ED). oklch(71.7% 0.133 247.1), rgb(87, 170, 242).
Aa
Black text reads best on this color (8.43:1).
About this color
#57AAF2 is a medium-light, moderately saturated blue. In OKLCH its lightness is 72%, its chroma 0.133 and its hue 247°. Its hue sits on the cool side of the wheel. The nearest named color is Cornflower Blue (#6495ED), ΔE 0.055 away. Black text reads best on it, at 8.43:1.
| Hue family | Blues |
| Lightness | medium-light (72%) |
| Chroma | moderately saturated (0.133) |
| Temperature | cool |
| Nearest name | Cornflower Blue (#6495ED) |
| Black text | 8.43:1 |
| White text | 2.48:1 |
Values
| HEX | #57AAF2 |
| RGB | rgb(87, 170, 242) |
| HSL | hsl(208, 86%, 65%) |
| OKLCH | oklch(71.7% 0.133 247.1) |
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 #57AAF2 | 2.48:1 | Fails | Lc -53.7 | Large or bold text, headings |
| Black text on #57AAF2 | 8.43:1 | AAA | Lc 55.4 | Large or bold text, headings |
| #57AAF2 text on white | 2.48:1 | Fails | Lc 48.6 | Large or bold text, headings |
| #57AAF2 text on black | 8.43:1 | AAA | Lc -53.3 | 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
#C2DDF7
oklch(88.6% 0.046 247.3)
-
Step 300
300
#95C6F4
oklch(80.9% 0.083 247.3)
-
Step 400
400 (this color)
#57AAF2
oklch(71.7% 0.133 247.1)
-
Step 500
500
#008EE7
oklch(63% 0.167 247.2)
-
Step 600
600
#0078C3
oklch(55.7% 0.146 246.8)
-
Step 700
700
#0064A5
oklch(49% 0.13 247.2)
-
Step 800
800
#005289
oklch(42.7% 0.113 247.3)
-
Step 900
900
#004473
oklch(37.7% 0.1 247.4)
-
Step 950
950
#012846
oklch(26.9% 0.07 247.1)
#57AAF2 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) | #8AACF5 | 0.053 |
| Deuteranopia (no green cones) | #759DF1 | 0.041 |
| Tritanopia (no blue cones) | #00BBC3 | 0.102 |
| Achromatopsia (no color) | #A4A4A4 | 0.133 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #57AAF2
#57AAF2
oklch(71.7% 0.133 247.1)
- #DA923B
#DA923B
oklch(71.7% 0.133 67.5)
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 #57AAF2, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cornflower Blue #6495ED ΔE 0.055
- Deep Sky Blue #00BFFF ΔE 0.058
- Chefchaouen Blue #4895EF ΔE 0.060
- Carolina Blue #8AB8FE ΔE 0.068
- Periwinkle Blue #8F99FB ΔE 0.073
- Dark Sky Blue #448EE4 ΔE 0.080
- Vivid Sky Blue #4CC9F0 ΔE 0.086
- Turquoise Blue #06B1C4 ΔE 0.087
Use #57AAF2 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.