#42E6ED
Closest named color: Robin's Egg (#6DEDFD). oklch(84.7% 0.13 199.3), rgb(66, 230, 237).
Aa
Black text reads best on this color (13.77:1).
About this color
#42E6ED is a light, moderately saturated teal or cyan. In OKLCH its lightness is 85%, its chroma 0.130 and its hue 199°. Its hue sits on the cool side of the wheel. The nearest named color is Robin's Egg (#6DEDFD), ΔE 0.040 away. Black text reads best on it, at 13.77:1.
| Hue family | Teals and cyans |
| Lightness | light (85%) |
| Chroma | moderately saturated (0.130) |
| Temperature | cool |
| Nearest name | Robin's Egg (#6DEDFD) |
| Black text | 13.77:1 |
| White text | 1.52:1 |
Values
| HEX | #42E6ED |
| RGB | rgb(66, 230, 237) |
| HSL | hsl(182, 83%, 59%) |
| OKLCH | oklch(84.7% 0.13 199.3) |
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 #42E6ED | 1.52:1 | Fails | Lc -27.1 | Dividers and decoration only |
| Black text on #42E6ED | 13.77:1 | AAA | Lc 79.8 | Fine for body text |
| #42E6ED text on white | 1.52:1 | Fails | Lc 23.9 | Dividers and decoration only |
| #42E6ED text on black | 13.77:1 | AAA | Lc -79.2 | 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
#E9F9FA
oklch(97.1% 0.017 201.4)
-
Step 100
100
#CEF2F3
oklch(93.6% 0.037 198.6)
-
Step 200
200
#9FE8EB
oklch(88.4% 0.072 199.2)
-
Step 300
300 (this color)
#42E6ED
oklch(84.7% 0.13 199.3)
-
Step 400
400
#00B7BD
oklch(70.8% 0.12 199)
-
Step 500
500
#009DA2
oklch(63.2% 0.107 198.8)
-
Step 600
600
#008488
oklch(55.7% 0.095 198.5)
-
Step 700
700
#006F73
oklch(49.2% 0.084 199.2)
-
Step 800
800
#005B5E
oklch(42.8% 0.073 198.7)
-
Step 900
900
#004C4F
oklch(37.8% 0.064 199.4)
-
Step 950
950
#002D2F
oklch(27% 0.046 199.4)
#42E6ED 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) | #D5DCEE | 0.133 |
| Deuteranopia (no green cones) | #BDCAEE | 0.123 |
| Tritanopia (no blue cones) | #00EEE8 | 0.028 |
| Achromatopsia (no color) | #D1D1D1 | 0.131 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #42E6ED
#42E6ED
oklch(84.7% 0.13 199.3)
- #FFB7B7
#FFB7B7
oklch(84.7% 0.084 19)
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 #42E6ED, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Robin's Egg #6DEDFD ΔE 0.040
- Turquoise #40E0D0 ΔE 0.040
- Aqua Blue #02D8E9 ΔE 0.044
- Bright Light Blue #26F7FD ΔE 0.045
- Bright Aqua #0BF9EA ΔE 0.054
- Bright Cyan #41FDFE ΔE 0.061
- Bright Turquoise #0FFEF9 ΔE 0.062
- Medium Turquoise #48D1CC ΔE 0.064
Use #42E6ED 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.