#42E2FA
Closest named color: Aqua Blue (#02D8E9). oklch(84.2% 0.131 209.8), rgb(66, 226, 250).
Aa
Black text reads best on this color (13.49:1).
About this color
#42E2FA is a light, moderately saturated teal or cyan. In OKLCH its lightness is 84%, its chroma 0.131 and its hue 210°. Its hue sits on the cool side of the wheel. The nearest named color is Aqua Blue (#02D8E9), ΔE 0.039 away. Black text reads best on it, at 13.49:1.
| Hue family | Teals and cyans |
| Lightness | light (84%) |
| Chroma | moderately saturated (0.131) |
| Temperature | cool |
| Nearest name | Aqua Blue (#02D8E9) |
| Black text | 13.49:1 |
| White text | 1.55:1 |
Values
| HEX | #42E2FA |
| RGB | rgb(66, 226, 250) |
| HSL | hsl(188, 95%, 62%) |
| OKLCH | oklch(84.2% 0.131 209.8) |
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 #42E2FA | 1.55:1 | Fails | Lc -28.4 | Dividers and decoration only |
| Black text on #42E2FA | 13.49:1 | AAA | Lc 78.7 | Fine for body text |
| #42E2FA text on white | 1.55:1 | Fails | Lc 25.1 | Dividers and decoration only |
| #42E2FA text on black | 13.49:1 | AAA | Lc -78.0 | 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
#E9F9FC
oklch(97.1% 0.017 210.2)
-
Step 100
100
#CEF1F8
oklch(93.5% 0.038 211.1)
-
Step 200
200
#A0E7F4
oklch(88.5% 0.073 210.2)
-
Step 300
300 (this color)
#42E2FA
oklch(84.2% 0.131 209.8)
-
Step 400
400
#00B5CA
oklch(70.8% 0.122 209.4)
-
Step 500
500
#009BAE
oklch(63.2% 0.109 210)
-
Step 600
600
#008292
oklch(55.6% 0.096 209.8)
-
Step 700
700
#006D7B
oklch(49% 0.085 210.2)
-
Step 800
800
#005A65
oklch(42.8% 0.074 209.1)
-
Step 900
900
#004B55
oklch(37.8% 0.065 210)
-
Step 950
950
#002C33
oklch(26.9% 0.047 211.1)
#42E2FA 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) | #CDDAFB | 0.123 |
| Deuteranopia (no green cones) | #B4C7FA | 0.113 |
| Tritanopia (no blue cones) | #00EDE9 | 0.046 |
| Achromatopsia (no color) | #CFCFCF | 0.132 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #42E2FA
#42E2FA
oklch(84.2% 0.131 209.8)
- #FFB6AA
#FFB6AA
oklch(84.2% 0.087 29.5)
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 #42E2FA, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Aqua Blue #02D8E9 ΔE 0.039
- Robin's Egg #6DEDFD ΔE 0.042
- Bright Light Blue #26F7FD ΔE 0.056
- Turquoise #40E0D0 ΔE 0.059
- Sky Blue #87CEEB ΔE 0.063
- Vivid Sky Blue #4CC9F0 ΔE 0.066
- Light Sky Blue #87CEFA ΔE 0.067
- Robin Egg Blue #8AF1FE ΔE 0.068
Use #42E2FA 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.