#57B99E
Closest named color: Greeny Blue (#42B395). oklch(71.9% 0.101 172.8), rgb(87, 185, 158).
Aa
Black text reads best on this color (8.83:1).
About this color
#57B99E is a medium-light, moderately saturated teal or cyan. In OKLCH its lightness is 72%, its chroma 0.101 and its hue 173°. Its hue sits on the cool side of the wheel. The nearest named color is Greeny Blue (#42B395), ΔE 0.027 away. Black text reads best on it, at 8.83:1.
| Hue family | Teals and cyans |
| Lightness | medium-light (72%) |
| Chroma | moderately saturated (0.101) |
| Temperature | cool |
| Nearest name | Greeny Blue (#42B395) |
| Black text | 8.83:1 |
| White text | 2.37:1 |
Values
| HEX | #57B99E |
| RGB | rgb(87, 185, 158) |
| HSL | hsl(163, 41%, 53%) |
| OKLCH | oklch(71.9% 0.101 172.8) |
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 #57B99E | 2.37:1 | Fails | Lc -51.6 | Large or bold text, headings |
| Black text on #57B99E | 8.83:1 | AAA | Lc 57.4 | Large or bold text, headings |
| #57B99E text on white | 2.37:1 | Fails | Lc 46.6 | Large or bold text, headings |
| #57B99E text on black | 8.83:1 | AAA | Lc -55.4 | 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
#F0F7F5
oklch(97% 0.008 177.3)
-
Step 100
100
#DEEEE8
oklch(93.6% 0.019 171.5)
-
Step 200
200
#C3E1D7
oklch(88.5% 0.034 173.4)
-
Step 300
300
#96CEBC
oklch(80.8% 0.063 172.8)
-
Step 400
400 (this color)
#57B99E
oklch(71.9% 0.101 172.8)
-
Step 500
500
#00A182
oklch(63.2% 0.122 172.6)
-
Step 600
600
#00876D
oklch(55.6% 0.107 172.9)
-
Step 700
700
#00725B
oklch(49.2% 0.095 172.3)
-
Step 800
800
#005D4A
oklch(42.6% 0.082 172.5)
-
Step 900
900
#004E3E
oklch(37.8% 0.073 172.9)
-
Step 950
950
#002E24
oklch(26.9% 0.051 173.7)
#57B99E 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) | #B4AF9D | 0.105 |
| Deuteranopia (no green cones) | #A5A4A0 | 0.100 |
| Tritanopia (no blue cones) | #28BBB1 | 0.033 |
| Achromatopsia (no color) | #A8A8A8 | 0.102 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #57B99E
#57B99E
oklch(71.9% 0.101 172.8)
- #D689AA
#D689AA
oklch(71.9% 0.102 352.7)
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 #57B99E, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Greeny Blue #42B395 ΔE 0.027
- Topaz #13BBAF ΔE 0.034
- Light Sea Green #20B2AA ΔE 0.043
- Tea #65AB7C ΔE 0.050
- Green Blue #01C08D ΔE 0.050
- Greenblue #23C48B ΔE 0.055
- Muted Teal #90B494 ΔE 0.055
- Faded Green #7BB274 ΔE 0.056
Use #57B99E 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.