#57ADD4
Closest named color: Turquoise Blue (#06B1C4). oklch(71% 0.1 230), rgb(87, 173, 212).
Aa
Black text reads best on this color (8.33:1).
About this color
#57ADD4 is a medium-light, moderately saturated teal or cyan. In OKLCH its lightness is 71%, its chroma 0.100 and its hue 230°. Its hue sits on the cool side of the wheel. The nearest named color is Turquoise Blue (#06B1C4), ΔE 0.047 away. Black text reads best on it, at 8.33:1.
| Hue family | Teals and cyans |
| Lightness | medium-light (71%) |
| Chroma | moderately saturated (0.100) |
| Temperature | cool |
| Nearest name | Turquoise Blue (#06B1C4) |
| Black text | 8.33:1 |
| White text | 2.51:1 |
Values
| HEX | #57ADD4 |
| RGB | rgb(87, 173, 212) |
| HSL | hsl(199, 59%, 59%) |
| OKLCH | oklch(71% 0.1 230) |
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 #57ADD4 | 2.51:1 | Fails | Lc -54.3 | Large or bold text, headings |
| Black text on #57ADD4 | 8.33:1 | AAA | Lc 54.8 | Large or bold text, headings |
| #57ADD4 text on white | 2.51:1 | Fails | Lc 49.2 | Large or bold text, headings |
| #57ADD4 text on black | 8.33:1 | AAA | Lc -52.7 | 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
#F0F7FA
oklch(97.2% 0.008 225.1)
-
Step 100
100
#DEECF4
oklch(93.5% 0.018 232.5)
-
Step 200
200
#C3DEEC
oklch(88.5% 0.035 230.3)
-
Step 300
300
#97C9E2
oklch(80.9% 0.063 230.1)
-
Step 400
400 (this color)
#57ADD4
oklch(71% 0.1 230)
-
Step 500
500
#0096C6
oklch(63% 0.126 229.9)
-
Step 600
600
#007EA7
oklch(55.5% 0.111 230)
-
Step 700
700
#006A8D
oklch(49.1% 0.098 229.8)
-
Step 800
800
#005774
oklch(42.7% 0.085 229.4)
-
Step 900
900
#004862
oklch(37.7% 0.076 230.8)
-
Step 950
950
#012B3B
oklch(27.1% 0.053 229.3)
#57ADD4 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) | #99ABD6 | 0.070 |
| Deuteranopia (no green cones) | #889DD3 | 0.062 |
| Tritanopia (no blue cones) | #00B8BA | 0.067 |
| Achromatopsia (no color) | #A3A3A3 | 0.101 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #57ADD4
#57ADD4
oklch(71% 0.1 230)
- #D48F67
#D48F67
oklch(71% 0.1 50.6)
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 #57ADD4, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Turquoise Blue #06B1C4 ΔE 0.047
- Greyblue #77A1B5 ΔE 0.052
- Bluegrey #85A3B2 ΔE 0.062
- Bluey Grey #89A0B0 ΔE 0.068
- Deep Sky Blue #00BFFF ΔE 0.070
- Cool Steel #97A7B3 ΔE 0.077
- Cadet Blue #5F9EA0 ΔE 0.077
- Vivid Sky Blue #4CC9F0 ΔE 0.077
Use #57ADD4 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.