#57A3AA
Closest named color: Cadet Blue (#5F9EA0). oklch(66.9% 0.076 203.3), rgb(87, 163, 170).
Aa
Black text reads best on this color (7.22:1).
About this color
#57A3AA is a medium-light, moderately saturated teal or cyan. In OKLCH its lightness is 67%, its chroma 0.076 and its hue 203°. Its hue sits on the cool side of the wheel. The nearest named color is Cadet Blue (#5F9EA0), ΔE 0.017 away. Black text reads best on it, at 7.22:1.
| Hue family | Teals and cyans |
| Lightness | medium-light (67%) |
| Chroma | moderately saturated (0.076) |
| Temperature | cool |
| Nearest name | Cadet Blue (#5F9EA0) |
| Black text | 7.22:1 |
| White text | 2.90:1 |
Values
| HEX | #57A3AA |
| RGB | rgb(87, 163, 170) |
| HSL | hsl(185, 33%, 50%) |
| OKLCH | oklch(66.9% 0.076 203.3) |
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 #57A3AA | 2.90:1 | Fails | Lc -60.6 | Content text, not long reading |
| Black text on #57A3AA | 7.22:1 | AAA | Lc 48.8 | Large or bold text, headings |
| #57A3AA text on white | 2.90:1 | Fails | Lc 55.3 | Large or bold text, headings |
| #57A3AA text on black | 7.22:1 | AAA | Lc -46.5 | 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
#F1F7F7
oklch(97.2% 0.006 197.1)
-
Step 100
100
#E0EDEE
oklch(93.7% 0.014 202.5)
-
Step 200
200
#C6DFE1
oklch(88.6% 0.027 202.5)
-
Step 300
300
#9DCACE
oklch(80.8% 0.048 203)
-
Step 400
400 (this color)
#57A3AA
oklch(66.9% 0.076 203.3)
-
Step 500
500
#2A9AA4
oklch(63% 0.097 203.9)
-
Step 600
600
#00838C
oklch(55.6% 0.095 203.3)
-
Step 700
700
#006E76
oklch(49.1% 0.084 203.6)
-
Step 800
800
#005A61
oklch(42.6% 0.073 204)
-
Step 900
900
#024B51
oklch(37.7% 0.063 204.1)
-
Step 950
950
#082C2F
oklch(27% 0.04 203.1)
#57A3AA 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) | #999DAB | 0.077 |
| Deuteranopia (no green cones) | #8B93AA | 0.070 |
| Tritanopia (no blue cones) | #26A8A5 | 0.035 |
| Achromatopsia (no color) | #979797 | 0.076 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #57A3AA
#57A3AA
oklch(66.9% 0.076 203.3)
- #C0837F
#C0837F
oklch(67% 0.076 23.5)
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 #57A3AA, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cadet Blue #5F9EA0 ΔE 0.017
- Dull Teal #5F9E8F ΔE 0.038
- Greyblue #77A1B5 ΔE 0.039
- Grey Teal #5E9B8A ΔE 0.046
- Sea #3C9992 ΔE 0.050
- Light Sea Green #20B2AA ΔE 0.050
- Turquoise Blue #06B1C4 ΔE 0.051
- Bluegrey #85A3B2 ΔE 0.052
Use #57A3AA 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.