#42E1CB
Closest named color: Turquoise (#40E0D0). oklch(82.4% 0.133 181.6), rgb(66, 225, 203).
Aa
Black text reads best on this color (12.86:1).
About this color
#42E1CB is a light, moderately saturated teal or cyan. In OKLCH its lightness is 82%, its chroma 0.133 and its hue 182°. Its hue sits on the cool side of the wheel. The nearest named color is Turquoise (#40E0D0), ΔE 0.008 away. Black text reads best on it, at 12.86:1.
| Hue family | Teals and cyans |
| Lightness | light (82%) |
| Chroma | moderately saturated (0.133) |
| Temperature | cool |
| Nearest name | Turquoise (#40E0D0) |
| Black text | 12.86:1 |
| White text | 1.63:1 |
Values
| HEX | #42E1CB |
| RGB | rgb(66, 225, 203) |
| HSL | hsl(172, 73%, 57%) |
| OKLCH | oklch(82.4% 0.133 181.6) |
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 #42E1CB | 1.63:1 | Fails | Lc -31.3 | Non-text elements, placeholder text |
| Black text on #42E1CB | 12.86:1 | AAA | Lc 76.0 | Fine for body text |
| #42E1CB text on white | 1.63:1 | Fails | Lc 27.8 | Dividers and decoration only |
| #42E1CB text on black | 12.86:1 | AAA | Lc -75.2 | Fine for body text |
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 300.
-
Step 50
50
#E9FAF6
oklch(97.1% 0.019 180.3)
-
Step 100
100
#CFF3EB
oklch(93.6% 0.039 180.5)
-
Step 200
200
#A2EADC
oklch(88.6% 0.074 181)
-
Step 300
300 (this color)
#42E1CB
oklch(82.4% 0.133 181.6)
-
Step 400
400
#00BAA6
oklch(70.8% 0.127 181.5)
-
Step 500
500
#009F8E
oklch(63% 0.113 181.8)
-
Step 600
600
#008677
oklch(55.6% 0.1 181.4)
-
Step 700
700
#007164
oklch(49.2% 0.089 181.2)
-
Step 800
800
#005C52
oklch(42.6% 0.076 182.2)
-
Step 900
900
#004D44
oklch(37.7% 0.068 181.7)
-
Step 950
950
#002E28
oklch(27% 0.049 181.5)
#42E1CB 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) | #D7D4CA | 0.141 |
| Deuteranopia (no green cones) | #C1C4CD | 0.133 |
| Tritanopia (no blue cones) | #00E5DA | 0.022 |
| Achromatopsia (no color) | #CACACA | 0.134 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #42E1CB
#42E1CB
oklch(82.4% 0.133 181.6)
- #FFA8C0
#FFA8C0
oklch(82.3% 0.106 1.7)
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 #42E1CB, closest first.
No curated palette has a color within ΔE 0.04 of #42E1CB.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Turquoise #40E0D0 ΔE 0.008
- Aqua Marine #2EE8BB ΔE 0.035
- Medium Turquoise #48D1CC ΔE 0.046
- Seafoam Blue #78D1B6 ΔE 0.050
- Light Teal #90E4C1 ΔE 0.057
- Aqua Blue #02D8E9 ΔE 0.058
- Medium Aquamarine #66CDAA ΔE 0.059
- Dark Turquoise #00CED1 ΔE 0.062
Use #42E1CB 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.