#57A3DB
Closest named color: Cornflower Blue (#6495ED). oklch(69% 0.112 242.7), rgb(87, 163, 219).
Aa
Black text reads best on this color (7.66:1).
About this color
#57A3DB is a medium-light, moderately saturated blue. In OKLCH its lightness is 69%, its chroma 0.112 and its hue 243°. Its hue sits on the cool side of the wheel. The nearest named color is Cornflower Blue (#6495ED), ΔE 0.053 away. Black text reads best on it, at 7.66:1.
| Hue family | Blues |
| Lightness | medium-light (69%) |
| Chroma | moderately saturated (0.112) |
| Temperature | cool |
| Nearest name | Cornflower Blue (#6495ED) |
| Black text | 7.66:1 |
| White text | 2.73:1 |
Values
| HEX | #57A3DB |
| RGB | rgb(87, 163, 219) |
| HSL | hsl(205, 65%, 60%) |
| OKLCH | oklch(69% 0.112 242.7) |
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 #57A3DB | 2.73:1 | Fails | Lc -58.0 | Large or bold text, headings |
| Black text on #57A3DB | 7.66:1 | AAA | Lc 51.3 | Large or bold text, headings |
| #57A3DB text on white | 2.73:1 | Fails | Lc 52.8 | Large or bold text, headings |
| #57A3DB text on black | 7.66:1 | AAA | Lc -49.1 | 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
#F0F6FB
oklch(97% 0.009 242.8)
-
Step 100
100
#DFECF7
oklch(93.7% 0.02 243.4)
-
Step 200
200
#C4DDF1
oklch(88.5% 0.038 242.2)
-
Step 300
300
#99C7EB
oklch(81% 0.07 242.3)
-
Step 400
400 (this color)
#57A3DB
oklch(69% 0.112 242.7)
-
Step 500
500
#1C91D8
oklch(63% 0.143 242.7)
-
Step 600
600
#007ABA
oklch(55.6% 0.133 242.5)
-
Step 700
700
#00669D
oklch(49% 0.118 242.7)
-
Step 800
800
#005482
oklch(42.8% 0.102 242.4)
-
Step 900
900
#00466D
oklch(37.8% 0.09 242.2)
-
Step 950
950
#052941
oklch(27% 0.06 243.1)
#57A3DB 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) | #8AA4DE | 0.055 |
| Deuteranopia (no green cones) | #7896DA | 0.045 |
| Tritanopia (no blue cones) | #00B1B6 | 0.087 |
| Achromatopsia (no color) | #9C9C9C | 0.112 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #57A3DB
#57A3DB
oklch(69% 0.112 242.7)
- #CC8B4D
#CC8B4D
oklch(69% 0.112 62.8)
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 #57A3DB, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cornflower Blue #6495ED ΔE 0.053
- Chefchaouen Blue #4895EF ΔE 0.056
- Greyblue #77A1B5 ΔE 0.061
- Dark Sky Blue #448EE4 ΔE 0.067
- Turquoise Blue #06B1C4 ΔE 0.069
- Faded Blue #658CBB ΔE 0.069
- Bluegrey #85A3B2 ΔE 0.074
- Bluey Grey #89A0B0 ΔE 0.077
Use #57A3DB 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.