#57AAE5
Closest named color: Cornflower Blue (#6495ED). oklch(71% 0.118 242), rgb(87, 170, 229).
Aa
Black text reads best on this color (8.28:1).
About this color
#57AAE5 is a medium-light, moderately saturated blue. In OKLCH its lightness is 71%, its chroma 0.118 and its hue 242°. Its hue sits on the cool side of the wheel. The nearest named color is Cornflower Blue (#6495ED), ΔE 0.061 away. Black text reads best on it, at 8.28:1.
| Hue family | Blues |
| Lightness | medium-light (71%) |
| Chroma | moderately saturated (0.118) |
| Temperature | cool |
| Nearest name | Cornflower Blue (#6495ED) |
| Black text | 8.28:1 |
| White text | 2.53:1 |
Values
| HEX | #57AAE5 |
| RGB | rgb(87, 170, 229) |
| HSL | hsl(205, 73%, 62%) |
| OKLCH | oklch(71% 0.118 242) |
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 #57AAE5 | 2.53:1 | Fails | Lc -54.5 | Large or bold text, headings |
| Black text on #57AAE5 | 8.28:1 | AAA | Lc 54.6 | Large or bold text, headings |
| #57AAE5 text on white | 2.53:1 | Fails | Lc 49.4 | Large or bold text, headings |
| #57AAE5 text on black | 8.28:1 | AAA | Lc -52.5 | 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
#F0F6FC
oklch(97% 0.01 247.9)
-
Step 100
100
#DEECF7
oklch(93.6% 0.021 241.4)
-
Step 200
200
#C2DDF3
oklch(88.5% 0.042 242.7)
-
Step 300
300
#96C7ED
oklch(80.9% 0.075 242.1)
-
Step 400
400 (this color)
#57AAE5
oklch(71% 0.118 242)
-
Step 500
500
#0092DB
oklch(63.2% 0.149 241.7)
-
Step 600
600
#007AB9
oklch(55.5% 0.132 242.1)
-
Step 700
700
#00679C
oklch(49.2% 0.116 241.5)
-
Step 800
800
#005481
oklch(42.7% 0.101 241.9)
-
Step 900
900
#00466C
oklch(37.7% 0.089 241.5)
-
Step 950
950
#012942
oklch(26.9% 0.063 242.1)
#57AAE5 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) | #90ABE8 | 0.060 |
| Deuteranopia (no green cones) | #7C9CE4 | 0.049 |
| Tritanopia (no blue cones) | #00B9BE | 0.089 |
| Achromatopsia (no color) | #A3A3A3 | 0.119 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #57AAE5
#57AAE5
oklch(71% 0.118 242)
- #D6904E
#D6904E
oklch(71.1% 0.118 62.2)
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 #57AAE5, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cornflower Blue #6495ED ΔE 0.061
- Deep Sky Blue #00BFFF ΔE 0.062
- Chefchaouen Blue #4895EF ΔE 0.066
- Turquoise Blue #06B1C4 ΔE 0.070
- Greyblue #77A1B5 ΔE 0.071
- Carolina Blue #8AB8FE ΔE 0.075
- Bluegrey #85A3B2 ΔE 0.081
- Dark Sky Blue #448EE4 ΔE 0.081
Use #57AAE5 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.