#57AAE2
Closest named color: Cornflower Blue (#6495ED). oklch(70.9% 0.115 240.6), rgb(87, 170, 226).
Aa
Black text reads best on this color (8.25:1).
About this color
#57AAE2 is a medium-light, moderately saturated blue. In OKLCH its lightness is 71%, its chroma 0.115 and its hue 241°. Its hue sits on the cool side of the wheel. The nearest named color is Cornflower Blue (#6495ED), ΔE 0.063 away. Black text reads best on it, at 8.25:1.
| Hue family | Blues |
| Lightness | medium-light (71%) |
| Chroma | moderately saturated (0.115) |
| Temperature | cool |
| Nearest name | Cornflower Blue (#6495ED) |
| Black text | 8.25:1 |
| White text | 2.54:1 |
Values
| HEX | #57AAE2 |
| RGB | rgb(87, 170, 226) |
| HSL | hsl(204, 71%, 61%) |
| OKLCH | oklch(70.9% 0.115 240.6) |
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 #57AAE2 | 2.54:1 | Fails | Lc -54.7 | Large or bold text, headings |
| Black text on #57AAE2 | 8.25:1 | AAA | Lc 54.4 | Large or bold text, headings |
| #57AAE2 text on white | 2.54:1 | Fails | Lc 49.6 | Large or bold text, headings |
| #57AAE2 text on black | 8.25:1 | AAA | Lc -52.3 | 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
#F0F6FB
oklch(97% 0.009 242.8)
-
Step 100
100
#DEECF7
oklch(93.6% 0.021 241.4)
-
Step 200
200
#C2DDF2
oklch(88.4% 0.041 241.4)
-
Step 300
300
#97C7EB
oklch(80.8% 0.072 241.2)
-
Step 400
400 (this color)
#57AAE2
oklch(70.9% 0.115 240.6)
-
Step 500
500
#0092D8
oklch(63% 0.146 240.6)
-
Step 600
600
#007BB7
oklch(55.7% 0.129 240.7)
-
Step 700
700
#00679A
oklch(49.1% 0.113 240.5)
-
Step 800
800
#00547F
oklch(42.6% 0.099 240.7)
-
Step 900
900
#00466B
oklch(37.7% 0.087 240.8)
-
Step 950
950
#012941
oklch(26.9% 0.062 241.1)
#57AAE2 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) | #91AAE5 | 0.061 |
| Deuteranopia (no green cones) | #7E9CE1 | 0.050 |
| Tritanopia (no blue cones) | #00B8BD | 0.085 |
| Achromatopsia (no color) | #A2A2A2 | 0.115 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #57AAE2
#57AAE2
oklch(70.9% 0.115 240.6)
- #D58F52
#D58F52
oklch(70.8% 0.115 60.3)
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 #57AAE2, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cornflower Blue #6495ED ΔE 0.063
- Deep Sky Blue #00BFFF ΔE 0.063
- Turquoise Blue #06B1C4 ΔE 0.066
- Greyblue #77A1B5 ΔE 0.067
- Chefchaouen Blue #4895EF ΔE 0.068
- Carolina Blue #8AB8FE ΔE 0.077
- Bluegrey #85A3B2 ΔE 0.077
- Bluey Grey #89A0B0 ΔE 0.082
Use #57AAE2 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.