#42F9E2
Closest named color: Bright Aqua (#0BF9EA). oklch(88.8% 0.146 182.4), rgb(66, 249, 226).
Aa
Black text reads best on this color (15.88:1).
About this color
#42F9E2 is a light, vivid teal or cyan. In OKLCH its lightness is 89%, its chroma 0.146 and its hue 182°. Its hue sits on the cool side of the wheel. The nearest named color is Bright Aqua (#0BF9EA), ΔE 0.015 away. Black text reads best on it, at 15.88:1.
| Hue family | Teals and cyans |
| Lightness | light (89%) |
| Chroma | vivid (0.146) |
| Temperature | cool |
| Nearest name | Bright Aqua (#0BF9EA) |
| Black text | 15.88:1 |
| White text | 1.32:1 |
Values
| HEX | #42F9E2 |
| RGB | rgb(66, 249, 226) |
| HSL | hsl(172, 94%, 62%) |
| OKLCH | oklch(88.8% 0.146 182.4) |
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 #42F9E2 | 1.32:1 | Fails | Lc -17.7 | Dividers and decoration only |
| Black text on #42F9E2 | 15.88:1 | AAA | Lc 88.2 | Fine for body text |
| #42F9E2 text on white | 1.32:1 | Fails | Lc 15.4 | Dividers and decoration only |
| #42F9E2 text on black | 15.88:1 | AAA | Lc -88.3 | 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 200.
-
Step 50
50
#E4FBF7
oklch(97% 0.025 184.3)
-
Step 100
100
#C3F6ED
oklch(93.5% 0.053 183.2)
-
Step 200
200 (this color)
#42F9E2
oklch(88.8% 0.146 182.4)
-
Step 300
300
#00DEC8
oklch(80.8% 0.144 182.4)
-
Step 400
400
#00BAA7
oklch(70.8% 0.127 182.2)
-
Step 500
500
#009F8F
oklch(63.1% 0.113 182.5)
-
Step 600
600
#008678
oklch(55.6% 0.1 182.2)
-
Step 700
700
#007165
oklch(49.2% 0.088 182.2)
-
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)
#42F9E2 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) | #EDEAE1 | 0.154 |
| Deuteranopia (no green cones) | #D5D8E4 | 0.147 |
| Tritanopia (no blue cones) | #00FEF2 | 0.022 |
| Achromatopsia (no color) | #E0E0E0 | 0.147 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #42F9E2
#42F9E2
oklch(88.8% 0.146 182.4)
- #FFCAD6
#FFCAD6
oklch(88.9% 0.062 3.3)
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 #42F9E2, closest first.
No curated palette has a color within ΔE 0.04 of #42F9E2.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Bright Aqua #0BF9EA ΔE 0.015
- Bright Turquoise #0FFEF9 ΔE 0.030
- Bright Cyan #41FDFE ΔE 0.038
- Cyan #00FFFF ΔE 0.038
- Light Turquoise #7EF4CC ΔE 0.039
- Bright Light Blue #26F7FD ΔE 0.040
- Bright Teal #01F9C6 ΔE 0.043
- Aquamarine #7FFFD4 ΔE 0.045
Use #42F9E2 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.