#42DFD1
Closest named color: Turquoise (#40E0D0). oklch(82.1% 0.129 186.2), rgb(66, 223, 209).
Aa
Black text reads best on this color (12.70:1).
About this color
#42DFD1 is a light, moderately saturated teal or cyan. In OKLCH its lightness is 82%, its chroma 0.129 and its hue 186°. Its hue sits on the cool side of the wheel. The nearest named color is Turquoise (#40E0D0), ΔE 0.004 away. Black text reads best on it, at 12.70:1.
| Hue family | Teals and cyans |
| Lightness | light (82%) |
| Chroma | moderately saturated (0.129) |
| Temperature | cool |
| Nearest name | Turquoise (#40E0D0) |
| Black text | 12.70:1 |
| White text | 1.65:1 |
Values
| HEX | #42DFD1 |
| RGB | rgb(66, 223, 209) |
| HSL | hsl(175, 71%, 57%) |
| OKLCH | oklch(82.1% 0.129 186.2) |
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 #42DFD1 | 1.65:1 | Fails | Lc -32.1 | Non-text elements, placeholder text |
| Black text on #42DFD1 | 12.70:1 | AAA | Lc 75.4 | Fine for body text |
| #42DFD1 text on white | 1.65:1 | Fails | Lc 28.4 | Dividers and decoration only |
| #42DFD1 text on black | 12.70:1 | AAA | Lc -74.5 | 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
#E9F9F7
oklch(97% 0.017 187.9)
-
Step 100
100
#CFF2EE
oklch(93.5% 0.037 188.1)
-
Step 200
200
#A2E9E0
oklch(88.5% 0.072 186.1)
-
Step 300
300 (this color)
#42DFD1
oklch(82.1% 0.129 186.2)
-
Step 400
400
#00B9AC
oklch(70.7% 0.124 186)
-
Step 500
500
#009F94
oklch(63.2% 0.111 186.2)
-
Step 600
600
#00857C
oklch(55.5% 0.097 186.5)
-
Step 700
700
#007068
oklch(49.1% 0.086 186.2)
-
Step 800
800
#005C55
oklch(42.7% 0.075 185.9)
-
Step 900
900
#004D47
oklch(37.8% 0.066 185.9)
-
Step 950
950
#002E2A
oklch(27.1% 0.048 185.8)
#42DFD1 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) | #D3D3D1 | 0.136 |
| Deuteranopia (no green cones) | #BDC2D3 | 0.130 |
| Tritanopia (no blue cones) | #00E4DA | 0.018 |
| Achromatopsia (no color) | #C9C9C9 | 0.130 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #42DFD1
#42DFD1
oklch(82.1% 0.129 186.2)
- #FFA8BA
#FFA8BA
oklch(82.2% 0.104 6.1)
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 #42DFD1, closest first.
No curated palette has a color within ΔE 0.04 of #42DFD1.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Turquoise #40E0D0 ΔE 0.004
- Medium Turquoise #48D1CC ΔE 0.038
- Aqua Blue #02D8E9 ΔE 0.047
- Aqua Marine #2EE8BB ΔE 0.047
- Seafoam Blue #78D1B6 ΔE 0.049
- Dark Turquoise #00CED1 ΔE 0.054
- Medium Aquamarine #66CDAA ΔE 0.060
- Light Teal #90E4C1 ΔE 0.062
Use #42DFD1 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.