#42DFDF
Closest named color: Turquoise (#40E0D0). oklch(82.5% 0.126 195), rgb(66, 223, 223).
Aa
Black text reads best on this color (12.85:1).
About this color
#42DFDF is a light, moderately saturated teal or cyan. In OKLCH its lightness is 83%, its chroma 0.126 and its hue 195°. Its hue sits on the cool side of the wheel. The nearest named color is Turquoise (#40E0D0), ΔE 0.023 away. Black text reads best on it, at 12.85:1.
| Hue family | Teals and cyans |
| Lightness | light (83%) |
| Chroma | moderately saturated (0.126) |
| Temperature | cool |
| Nearest name | Turquoise (#40E0D0) |
| Black text | 12.85:1 |
| White text | 1.63:1 |
Values
| HEX | #42DFDF |
| RGB | rgb(66, 223, 223) |
| HSL | hsl(180, 71%, 57%) |
| OKLCH | oklch(82.5% 0.126 195) |
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 #42DFDF | 1.63:1 | Fails | Lc -31.4 | Non-text elements, placeholder text |
| Black text on #42DFDF | 12.85:1 | AAA | Lc 76.0 | Fine for body text |
| #42DFDF text on white | 1.63:1 | Fails | Lc 27.8 | Dividers and decoration only |
| #42DFDF text on black | 12.85:1 | AAA | Lc -75.1 | Fine for body text |
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
#E9F9F9
oklch(97% 0.017 196.9)
-
Step 100
100
#CFF2F1
oklch(93.6% 0.036 194.4)
-
Step 200
200
#A2E8E7
oklch(88.5% 0.07 194.8)
-
Step 300
300 (this color)
#42DFDF
oklch(82.5% 0.126 195)
-
Step 400
400
#00B7B8
oklch(70.6% 0.12 195.5)
-
Step 500
500
#009D9E
oklch(63.1% 0.108 195.6)
-
Step 600
600
#008484
oklch(55.5% 0.095 194.8)
-
Step 700
700
#006F6F
oklch(49% 0.084 194.8)
-
Step 800
800
#005B5B
oklch(42.7% 0.073 194.8)
-
Step 900
900
#004C4C
oklch(37.7% 0.064 194.8)
-
Step 950
950
#002D2D
oklch(26.9% 0.046 194.8)
#42DFDF 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) | #D0D4DF | 0.131 |
| Deuteranopia (no green cones) | #B9C3E0 | 0.123 |
| Tritanopia (no blue cones) | #00E6DF | 0.022 |
| Achromatopsia (no color) | #CACACA | 0.127 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #42DFDF
#42DFDF
oklch(82.5% 0.126 195)
- #FFACB1
#FFACB1
oklch(82.6% 0.098 15.5)
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 #42DFDF, closest first.
No curated palette has a color within ΔE 0.04 of #42DFDF.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Turquoise #40E0D0 ΔE 0.023
- Aqua Blue #02D8E9 ΔE 0.032
- Medium Turquoise #48D1CC ΔE 0.040
- Dark Turquoise #00CED1 ΔE 0.054
- Seafoam Blue #78D1B6 ΔE 0.060
- Robin's Egg #6DEDFD ΔE 0.061
- Aqua Marine #2EE8BB ΔE 0.065
- Bright Light Blue #26F7FD ΔE 0.066
Use #42DFDF 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.