#42D1CA
Closest named color: Medium Turquoise (#48D1CC). oklch(78.5% 0.119 190.2), rgb(66, 209, 202).
Aa
Black text reads best on this color (11.20:1).
About this color
#42D1CA is a light, moderately saturated teal or cyan. In OKLCH its lightness is 78%, its chroma 0.119 and its hue 190°. Its hue sits on the cool side of the wheel. The nearest named color is Medium Turquoise (#48D1CC), ΔE 0.005 away. Black text reads best on it, at 11.20:1.
| Hue family | Teals and cyans |
| Lightness | light (78%) |
| Chroma | moderately saturated (0.119) |
| Temperature | cool |
| Nearest name | Medium Turquoise (#48D1CC) |
| Black text | 11.20:1 |
| White text | 1.87:1 |
Values
| HEX | #42D1CA |
| RGB | rgb(66, 209, 202) |
| HSL | hsl(177, 61%, 54%) |
| OKLCH | oklch(78.5% 0.119 190.2) |
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 #42D1CA | 1.87:1 | Fails | Lc -39.3 | Non-text elements, placeholder text |
| Black text on #42D1CA | 11.20:1 | AAA | Lc 68.8 | Content text, not long reading |
| #42D1CA text on white | 1.87:1 | Fails | Lc 35.1 | Non-text elements, placeholder text |
| #42D1CA text on black | 11.20:1 | AAA | Lc -67.4 | 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
#A6E8E3
oklch(88.6% 0.067 190.1)
-
Step 300
300 (this color)
#42D1CA
oklch(78.5% 0.119 190.2)
-
Step 400
400
#00B8B2
oklch(70.6% 0.122 190.6)
-
Step 500
500
#009E98
oklch(63.1% 0.109 190)
-
Step 600
600
#008580
oklch(55.7% 0.096 190.1)
-
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
#002E2C
oklch(27.2% 0.047 190.2)
#42D1CA 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) | #C5C6CA | 0.126 |
| Deuteranopia (no green cones) | #B0B7CB | 0.118 |
| Tritanopia (no blue cones) | #00D7CE | 0.020 |
| Achromatopsia (no color) | #BDBDBD | 0.120 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #42D1CA
#42D1CA
oklch(78.5% 0.119 190.2)
- #FB98A7
#FB98A7
oklch(78.6% 0.12 10.4)
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 #42D1CA, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Medium Turquoise #48D1CC ΔE 0.005
- Dark Turquoise #00CED1 ΔE 0.023
- Turquoise #40E0D0 ΔE 0.041
- Aqua Blue #02D8E9 ΔE 0.042
- Seafoam Blue #78D1B6 ΔE 0.043
- Medium Aquamarine #66CDAA ΔE 0.044
- Pale Teal #82CBB2 ΔE 0.051
- Tiffany Blue #94D2BD ΔE 0.065
Use #42D1CA 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.