#42DEBA
Closest named color: Aqua Marine (#2EE8BB). oklch(81.1% 0.138 173.7), rgb(66, 222, 186).
Aa
Black text reads best on this color (12.38:1).
About this color
#42DEBA is a light, moderately saturated teal or cyan. In OKLCH its lightness is 81%, its chroma 0.138 and its hue 174°. Its hue sits on the cool side of the wheel. The nearest named color is Aqua Marine (#2EE8BB), ΔE 0.028 away. Black text reads best on it, at 12.38:1.
| Hue family | Teals and cyans |
| Lightness | light (81%) |
| Chroma | moderately saturated (0.138) |
| Temperature | cool |
| Nearest name | Aqua Marine (#2EE8BB) |
| Black text | 12.38:1 |
| White text | 1.69:1 |
Values
| HEX | #42DEBA |
| RGB | rgb(66, 222, 186) |
| HSL | hsl(166, 70%, 56%) |
| OKLCH | oklch(81.1% 0.138 173.7) |
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 #42DEBA | 1.69:1 | Fails | Lc -33.6 | Non-text elements, placeholder text |
| Black text on #42DEBA | 12.38:1 | AAA | Lc 74.0 | Content text, not long reading |
| #42DEBA text on white | 1.69:1 | Fails | Lc 29.8 | Dividers and decoration only |
| #42DEBA text on black | 12.38:1 | AAA | Lc -73.0 | 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
#EAFAF4
oklch(97.2% 0.019 171.5)
-
Step 100
100
#D0F3E8
oklch(93.6% 0.039 174.5)
-
Step 200
200
#A3EAD5
oklch(88.4% 0.077 174.1)
-
Step 300
300 (this color)
#42DEBA
oklch(81.1% 0.138 173.7)
-
Step 400
400
#00BB9A
oklch(70.7% 0.134 174)
-
Step 500
500
#00A183
oklch(63.2% 0.121 173.2)
-
Step 600
600
#00876E
oklch(55.6% 0.106 173.6)
-
Step 700
700
#00725C
oklch(49.2% 0.094 173.1)
-
Step 800
800
#005D4B
oklch(42.7% 0.081 173.5)
-
Step 900
900
#004E3E
oklch(37.8% 0.073 172.9)
-
Step 950
950
#002E24
oklch(26.9% 0.051 173.7)
#42DEBA 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) | #D7D0B8 | 0.144 |
| Deuteranopia (no green cones) | #C2C0BD | 0.139 |
| Tritanopia (no blue cones) | #00E0D3 | 0.034 |
| Achromatopsia (no color) | #C7C7C7 | 0.139 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #42DEBA
#42DEBA
oklch(81.1% 0.138 173.7)
- #FF9FC7
#FF9FC7
oklch(81.1% 0.123 353.7)
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 #42DEBA, closest first.
No curated palette has a color within ΔE 0.04 of #42DEBA.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Aqua Marine #2EE8BB ΔE 0.028
- Turquoise #40E0D0 ΔE 0.030
- Emerald #06D6A0 ΔE 0.044
- Seafoam Blue #78D1B6 ΔE 0.046
- Medium Aquamarine #66CDAA ΔE 0.046
- Medium Turquoise #48D1CC ΔE 0.051
- Aqua Green #12E193 ΔE 0.060
- Pale Teal #82CBB2 ΔE 0.062
Use #42DEBA 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.