#57AADD
Closest named color: Turquoise Blue (#06B1C4). oklch(70.7% 0.11 238), rgb(87, 170, 221).
Aa
Black text reads best on this color (8.19:1).
About this color
#57AADD is a medium-light, moderately saturated blue. In OKLCH its lightness is 71%, its chroma 0.110 and its hue 238°. Its hue sits on the cool side of the wheel. The nearest named color is Turquoise Blue (#06B1C4), ΔE 0.060 away. Black text reads best on it, at 8.19:1.
| Hue family | Blues |
| Lightness | medium-light (71%) |
| Chroma | moderately saturated (0.110) |
| Temperature | cool |
| Nearest name | Turquoise Blue (#06B1C4) |
| Black text | 8.19:1 |
| White text | 2.56:1 |
Values
| HEX | #57AADD |
| RGB | rgb(87, 170, 221) |
| HSL | hsl(203, 66%, 60%) |
| OKLCH | oklch(70.7% 0.11 238) |
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 #57AADD | 2.56:1 | Fails | Lc -55.0 | Large or bold text, headings |
| Black text on #57AADD | 8.19:1 | AAA | Lc 54.1 | Large or bold text, headings |
| #57AADD text on white | 2.56:1 | Fails | Lc 49.9 | Large or bold text, headings |
| #57AADD text on black | 8.19:1 | AAA | Lc -52.0 | 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
#DEECF6
oklch(93.6% 0.02 238.7)
-
Step 200
200
#C3DDF0
oklch(88.4% 0.038 239.6)
-
Step 300
300
#97C8E8
oklch(80.9% 0.068 237.3)
-
Step 400
400 (this color)
#57AADD
oklch(70.7% 0.11 238)
-
Step 500
500
#0093D3
oklch(63% 0.14 238.1)
-
Step 600
600
#007CB2
oklch(55.6% 0.123 237.7)
-
Step 700
700
#006897
oklch(49.1% 0.109 238.1)
-
Step 800
800
#00557C
oklch(42.7% 0.094 237.9)
-
Step 900
900
#004768
oklch(37.7% 0.083 237.5)
-
Step 950
950
#022A3F
oklch(27.1% 0.057 237.5)
#57AADD 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) | #92A9DF | 0.062 |
| Deuteranopia (no green cones) | #809CDC | 0.052 |
| Tritanopia (no blue cones) | #00B7BB | 0.080 |
| Achromatopsia (no color) | #A2A2A2 | 0.110 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #57AADD
#57AADD
oklch(70.7% 0.11 238)
- #D48F58
#D48F58
oklch(70.8% 0.11 58.3)
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 #57AADD, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Turquoise Blue #06B1C4 ΔE 0.060
- Greyblue #77A1B5 ΔE 0.061
- Deep Sky Blue #00BFFF ΔE 0.067
- Cornflower Blue #6495ED ΔE 0.067
- Bluegrey #85A3B2 ΔE 0.071
- Chefchaouen Blue #4895EF ΔE 0.072
- Bluey Grey #89A0B0 ΔE 0.076
- Carolina Blue #8AB8FE ΔE 0.081
Use #57AADD 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.