#42D2CA
Closest named color: Medium Turquoise (#48D1CC). oklch(78.7% 0.12 189.6), rgb(66, 210, 202).
Aa
Black text reads best on this color (11.30:1).
About this color
#42D2CA is a light, moderately saturated teal or cyan. In OKLCH its lightness is 79%, its chroma 0.120 and its hue 190°. Its hue sits on the cool side of the wheel. The nearest named color is Medium Turquoise (#48D1CC), ΔE 0.006 away. Black text reads best on it, at 11.30:1.
| Hue family | Teals and cyans |
| Lightness | light (79%) |
| Chroma | moderately saturated (0.120) |
| Temperature | cool |
| Nearest name | Medium Turquoise (#48D1CC) |
| Black text | 11.30:1 |
| White text | 1.85:1 |
Values
| HEX | #42D2CA |
| RGB | rgb(66, 210, 202) |
| HSL | hsl(177, 62%, 54%) |
| OKLCH | oklch(78.7% 0.12 189.6) |
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 #42D2CA | 1.85:1 | Fails | Lc -38.8 | Non-text elements, placeholder text |
| Black text on #42D2CA | 11.30:1 | AAA | Lc 69.2 | Content text, not long reading |
| #42D2CA text on white | 1.85:1 | Fails | Lc 34.7 | Non-text elements, placeholder text |
| #42D2CA text on black | 11.30:1 | AAA | Lc -67.9 | Content text, not long reading |
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
#EAF9F8
oklch(97.1% 0.016 192.1)
-
Step 100
100
#D1F2EF
oklch(93.7% 0.035 189.9)
-
Step 200
200
#A6E8E2
oklch(88.5% 0.067 189)
-
Step 300
300 (this color)
#42D2CA
oklch(78.7% 0.12 189.6)
-
Step 400
400
#00B8B1
oklch(70.6% 0.122 190)
-
Step 500
500
#009E98
oklch(63.1% 0.109 190)
-
Step 600
600
#00857F
oklch(55.6% 0.096 189.2)
-
Step 700
700
#00706B
oklch(49.2% 0.085 189.4)
-
Step 800
800
#005C58
oklch(42.8% 0.074 189.6)
-
Step 900
900
#004C49
oklch(37.6% 0.065 190.2)
-
Step 950
950
#002E2B
oklch(27.1% 0.047 188)
#42D2CA 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) | #C6C7CA | 0.127 |
| Deuteranopia (no green cones) | #B1B8CB | 0.118 |
| Tritanopia (no blue cones) | #00D7CF | 0.018 |
| Achromatopsia (no color) | #BEBEBE | 0.121 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #42D2CA
#42D2CA
oklch(78.7% 0.12 189.6)
- #FC98A9
#FC98A9
oklch(78.7% 0.121 9.2)
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 #42D2CA, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Medium Turquoise #48D1CC ΔE 0.006
- Dark Turquoise #00CED1 ΔE 0.024
- Turquoise #40E0D0 ΔE 0.038
- Seafoam Blue #78D1B6 ΔE 0.042
- Aqua Blue #02D8E9 ΔE 0.042
- Medium Aquamarine #66CDAA ΔE 0.044
- Pale Teal #82CBB2 ΔE 0.050
- Tiffany Blue #94D2BD ΔE 0.064
Use #42D2CA 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.