#42E8CB
Closest named color: Aqua Marine (#2EE8BB). oklch(84.1% 0.14 178.2), rgb(66, 232, 203).
Aa
Black text reads best on this color (13.63:1).
About this color
#42E8CB is a light, moderately saturated teal or cyan. In OKLCH its lightness is 84%, its chroma 0.140 and its hue 178°. Its hue sits on the cool side of the wheel. The nearest named color is Aqua Marine (#2EE8BB), ΔE 0.025 away. Black text reads best on it, at 13.63:1.
| Hue family | Teals and cyans |
| Lightness | light (84%) |
| Chroma | moderately saturated (0.140) |
| Temperature | cool |
| Nearest name | Aqua Marine (#2EE8BB) |
| Black text | 13.63:1 |
| White text | 1.53:1 |
Values
| HEX | #42E8CB |
| RGB | rgb(66, 232, 203) |
| HSL | hsl(170, 78%, 58%) |
| OKLCH | oklch(84.1% 0.14 178.2) |
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 #42E8CB | 1.53:1 | Fails | Lc -27.7 | Dividers and decoration only |
| Black text on #42E8CB | 13.63:1 | AAA | Lc 79.3 | Fine for body text |
| #42E8CB text on white | 1.53:1 | Fails | Lc 24.5 | Dividers and decoration only |
| #42E8CB text on black | 13.63:1 | AAA | Lc -78.6 | 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
#E9FAF5
oklch(97.1% 0.019 176.5)
-
Step 100
100
#CEF3EA
oklch(93.5% 0.04 179)
-
Step 200
200
#A0EAD9
oklch(88.4% 0.077 178.4)
-
Step 300
300 (this color)
#42E8CB
oklch(84.1% 0.14 178.2)
-
Step 400
400
#00BAA1
oklch(70.6% 0.129 178.5)
-
Step 500
500
#00A08A
oklch(63.2% 0.116 178.3)
-
Step 600
600
#008673
oklch(55.5% 0.102 178.1)
-
Step 700
700
#007161
oklch(49.1% 0.09 178.4)
-
Step 800
800
#005D4F
oklch(42.8% 0.079 177.8)
-
Step 900
900
#004D42
oklch(37.6% 0.069 179)
-
Step 950
950
#002E26
oklch(26.9% 0.05 177.5)
#42E8CB 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) | #DFDACA | 0.147 |
| Deuteranopia (no green cones) | #C8C9CD | 0.140 |
| Tritanopia (no blue cones) | #00ECDF | 0.027 |
| Achromatopsia (no color) | #D0D0D0 | 0.141 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #42E8CB
#42E8CB
oklch(84.1% 0.14 178.2)
- #FFB1CA
#FFB1CA
oklch(84.1% 0.096 358.5)
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 #42E8CB, closest first.
No curated palette has a color within ΔE 0.04 of #42E8CB.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Aqua Marine #2EE8BB ΔE 0.025
- Turquoise #40E0D0 ΔE 0.026
- Bright Teal #01F9C6 ΔE 0.050
- Bright Aqua #0BF9EA ΔE 0.052
- Light Teal #90E4C1 ΔE 0.052
- Light Turquoise #7EF4CC ΔE 0.054
- Seafoam Blue #78D1B6 ΔE 0.063
- Medium Turquoise #48D1CC ΔE 0.066
Use #42E8CB 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.