#42D3BF
Closest named color: Medium Turquoise (#48D1CC). oklch(78.6% 0.124 181.8), rgb(66, 211, 191).
Aa
Black text reads best on this color (11.30:1).
About this color
#42D3BF is a light, moderately saturated teal or cyan. In OKLCH its lightness is 79%, its chroma 0.124 and its hue 182°. Its hue sits on the cool side of the wheel. The nearest named color is Medium Turquoise (#48D1CC), ΔE 0.022 away. Black text reads best on it, at 11.30:1.
| Hue family | Teals and cyans |
| Lightness | light (79%) |
| Chroma | moderately saturated (0.124) |
| Temperature | cool |
| Nearest name | Medium Turquoise (#48D1CC) |
| Black text | 11.30:1 |
| White text | 1.85:1 |
Values
| HEX | #42D3BF |
| RGB | rgb(66, 211, 191) |
| HSL | hsl(172, 62%, 54%) |
| OKLCH | oklch(78.6% 0.124 181.8) |
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 #42D3BF | 1.85:1 | Fails | Lc -38.8 | Non-text elements, placeholder text |
| Black text on #42D3BF | 11.30:1 | AAA | Lc 69.2 | Content text, not long reading |
| #42D3BF text on white | 1.85:1 | Fails | Lc 34.7 | Non-text elements, placeholder text |
| #42D3BF 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
#EAF9F6
oklch(97% 0.016 182.7)
-
Step 100
100
#D1F2EB
oklch(93.5% 0.036 181.3)
-
Step 200
200
#A6E9DC
oklch(88.6% 0.07 181.2)
-
Step 300
300 (this color)
#42D3BF
oklch(78.6% 0.124 181.8)
-
Step 400
400
#00BAA6
oklch(70.8% 0.127 181.5)
-
Step 500
500
#009F8E
oklch(63% 0.113 181.8)
-
Step 600
600
#008677
oklch(55.6% 0.1 181.4)
-
Step 700
700
#007164
oklch(49.2% 0.089 181.2)
-
Step 800
800
#005C52
oklch(42.6% 0.076 182.2)
-
Step 900
900
#004D44
oklch(37.7% 0.068 181.7)
-
Step 950
950
#002E28
oklch(27% 0.049 181.5)
#42D3BF 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) | #C9C7BE | 0.131 |
| Deuteranopia (no green cones) | #B5B8C1 | 0.125 |
| Tritanopia (no blue cones) | #00D7CD | 0.022 |
| Achromatopsia (no color) | #BEBEBE | 0.125 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #42D3BF
#42D3BF
oklch(78.6% 0.124 181.8)
- #FB96B3
#FB96B3
oklch(78.6% 0.125 1.9)
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 #42D3BF, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Medium Turquoise #48D1CC ΔE 0.022
- Medium Aquamarine #66CDAA ΔE 0.032
- Seafoam Blue #78D1B6 ΔE 0.036
- Dark Turquoise #00CED1 ΔE 0.037
- Turquoise #40E0D0 ΔE 0.038
- Pale Teal #82CBB2 ΔE 0.047
- Emerald #06D6A0 ΔE 0.052
- Aqua Blue #02D8E9 ΔE 0.057
Use #42D3BF 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.