#42D8BB
Closest named color: Turquoise (#40E0D0). oklch(79.7% 0.131 176.9), rgb(66, 216, 187).
Aa
Black text reads best on this color (11.77:1).
About this color
#42D8BB is a light, moderately saturated teal or cyan. In OKLCH its lightness is 80%, its chroma 0.131 and its hue 177°. Its hue sits on the cool side of the wheel. The nearest named color is Turquoise (#40E0D0), ΔE 0.031 away. Black text reads best on it, at 11.77:1.
| Hue family | Teals and cyans |
| Lightness | light (80%) |
| Chroma | moderately saturated (0.131) |
| Temperature | cool |
| Nearest name | Turquoise (#40E0D0) |
| Black text | 11.77:1 |
| White text | 1.78:1 |
Values
| HEX | #42D8BB |
| RGB | rgb(66, 216, 187) |
| HSL | hsl(168, 66%, 55%) |
| OKLCH | oklch(79.7% 0.131 176.9) |
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 #42D8BB | 1.78:1 | Fails | Lc -36.5 | Non-text elements, placeholder text |
| Black text on #42D8BB | 11.77:1 | AAA | Lc 71.3 | Content text, not long reading |
| #42D8BB text on white | 1.78:1 | Fails | Lc 32.5 | Non-text elements, placeholder text |
| #42D8BB text on black | 11.77:1 | AAA | Lc -70.1 | 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
#EAFAF5
oklch(97.2% 0.018 175.3)
-
Step 100
100
#D0F3E9
oklch(93.6% 0.039 176.3)
-
Step 200
200
#A5E9D8
oklch(88.4% 0.072 177.3)
-
Step 300
300 (this color)
#42D8BB
oklch(79.7% 0.131 176.9)
-
Step 400
400
#00BB9F
oklch(70.8% 0.132 176.8)
-
Step 500
500
#00A088
oklch(63.1% 0.117 177)
-
Step 600
600
#008772
oklch(55.7% 0.104 176.6)
-
Step 700
700
#007160
oklch(49.1% 0.091 177.4)
-
Step 800
800
#005D4E
oklch(42.8% 0.079 176.7)
-
Step 900
900
#004D41
oklch(37.6% 0.069 177.7)
-
Step 950
950
#002E26
oklch(26.9% 0.05 177.5)
#42D8BB 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) | #D0CBBA | 0.138 |
| Deuteranopia (no green cones) | #BBBCBD | 0.131 |
| Tritanopia (no blue cones) | #00DBCF | 0.028 |
| Achromatopsia (no color) | #C2C2C2 | 0.132 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #42D8BB
#42D8BB
oklch(79.7% 0.131 176.9)
- #FF98BE
#FF98BE
oklch(79.7% 0.13 356.9)
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 #42D8BB, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Turquoise #40E0D0 ΔE 0.031
- Medium Aquamarine #66CDAA ΔE 0.034
- Medium Turquoise #48D1CC ΔE 0.036
- Seafoam Blue #78D1B6 ΔE 0.037
- Emerald #06D6A0 ΔE 0.043
- Aqua Marine #2EE8BB ΔE 0.045
- Dark Turquoise #00CED1 ΔE 0.052
- Pale Teal #82CBB2 ΔE 0.052
Use #42D8BB 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.