#42E3D2
Closest named color: Turquoise (#40E0D0). oklch(83.1% 0.132 184.6), rgb(66, 227, 210).
Aa
Black text reads best on this color (13.14:1).
About this color
#42E3D2 is a light, moderately saturated teal or cyan. In OKLCH its lightness is 83%, its chroma 0.132 and its hue 185°. 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 13.14:1.
| Hue family | Teals and cyans |
| Lightness | light (83%) |
| Chroma | moderately saturated (0.132) |
| Temperature | cool |
| Nearest name | Turquoise (#40E0D0) |
| Black text | 13.14:1 |
| White text | 1.59:1 |
Values
| HEX | #42E3D2 |
| RGB | rgb(66, 227, 210) |
| HSL | hsl(174, 74%, 57%) |
| OKLCH | oklch(83.1% 0.132 184.6) |
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 #42E3D2 | 1.59:1 | Fails | Lc -30.0 | Dividers and decoration only |
| Black text on #42E3D2 | 13.14:1 | AAA | Lc 77.2 | Fine for body text |
| #42E3D2 text on white | 1.59:1 | Fails | Lc 26.5 | Dividers and decoration only |
| #42E3D2 text on black | 13.14:1 | AAA | Lc -76.5 | 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
#E9FAF7
oklch(97.2% 0.018 184.3)
-
Step 100
100
#CFF3ED
oklch(93.7% 0.038 184.4)
-
Step 200
200
#A1E9DF
oklch(88.4% 0.073 185.1)
-
Step 300
300 (this color)
#42E3D2
oklch(83.1% 0.132 184.6)
-
Step 400
400
#00B9AA
oklch(70.6% 0.125 184.7)
-
Step 500
500
#009F92
oklch(63.2% 0.111 184.7)
-
Step 600
600
#00867A
oklch(55.7% 0.099 183.9)
-
Step 700
700
#007067
oklch(49% 0.086 185.2)
-
Step 800
800
#005C54
oklch(42.7% 0.075 184.7)
-
Step 900
900
#004D46
oklch(37.8% 0.067 184.5)
-
Step 950
950
#002E29
oklch(27.1% 0.048 183.6)
#42E3D2 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) | #D8D6D1 | 0.141 |
| Deuteranopia (no green cones) | #C1C6D4 | 0.132 |
| Tritanopia (no blue cones) | #00E8DE | 0.020 |
| Achromatopsia (no color) | #CDCDCD | 0.133 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #42E3D2
#42E3D2
oklch(83.1% 0.132 184.6)
- #FFADBF
#FFADBF
oklch(83.1% 0.098 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 #42E3D2, closest first.
No curated palette has a color within ΔE 0.04 of #42E3D2.
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 0.041
- Medium Turquoise #48D1CC ΔE 0.049
- Aqua Blue #02D8E9 ΔE 0.054
- Seafoam Blue #78D1B6 ΔE 0.055
- Light Teal #90E4C1 ΔE 0.057
- Bright Aqua #0BF9EA ΔE 0.059
- Dark Turquoise #00CED1 ΔE 0.065
Use #42E3D2 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.