#42EAF6
Closest named color: Robin's Egg (#6DEDFD). oklch(85.9% 0.133 202.2), rgb(66, 234, 246).
Aa
Black text reads best on this color (14.33:1).
About this color
#42EAF6 is a light, moderately saturated teal or cyan. In OKLCH its lightness is 86%, its chroma 0.133 and its hue 202°. Its hue sits on the cool side of the wheel. The nearest named color is Robin's Egg (#6DEDFD), ΔE 0.029 away. Black text reads best on it, at 14.33:1.
| Hue family | Teals and cyans |
| Lightness | light (86%) |
| Chroma | moderately saturated (0.133) |
| Temperature | cool |
| Nearest name | Robin's Egg (#6DEDFD) |
| Black text | 14.33:1 |
| White text | 1.46:1 |
Values
| HEX | #42EAF6 |
| RGB | rgb(66, 234, 246) |
| HSL | hsl(184, 91%, 61%) |
| OKLCH | oklch(85.9% 0.133 202.2) |
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 #42EAF6 | 1.46:1 | Fails | Lc -24.6 | Dividers and decoration only |
| Black text on #42EAF6 | 14.33:1 | AAA | Lc 82.1 | Fine for body text |
| #42EAF6 text on white | 1.46:1 | Fails | Lc 21.6 | Dividers and decoration only |
| #42EAF6 text on black | 14.33:1 | AAA | Lc -81.7 | 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
#E5FAFC
oklch(97% 0.022 203.7)
-
Step 100
100
#C4F4F8
oklch(93.5% 0.049 202.6)
-
Step 200
200 (this color)
#42EAF6
oklch(85.9% 0.133 202.2)
-
Step 300
300
#00DAE7
oklch(80.9% 0.138 202.5)
-
Step 400
400
#00B6C1
oklch(70.7% 0.12 202.5)
-
Step 500
500
#009CA5
oklch(63.1% 0.107 202)
-
Step 600
600
#00838B
oklch(55.5% 0.095 202.3)
-
Step 700
700
#006E75
oklch(49% 0.083 202.5)
-
Step 800
800
#005A60
oklch(42.6% 0.073 202.7)
-
Step 900
900
#004B50
oklch(37.6% 0.064 202.5)
-
Step 950
950
#002D30
oklch(27% 0.046 201.8)
#42EAF6 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) | #D8E0F7 | 0.134 |
| Deuteranopia (no green cones) | #BFCDF7 | 0.124 |
| Tritanopia (no blue cones) | #00F3ED | 0.033 |
| Achromatopsia (no color) | #D5D5D5 | 0.134 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #42EAF6
#42EAF6
oklch(85.9% 0.133 202.2)
- #FFBEBA
#FFBEBA
oklch(86% 0.076 22.8)
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 #42EAF6, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Robin's Egg #6DEDFD ΔE 0.029
- Bright Light Blue #26F7FD ΔE 0.034
- Bright Aqua #0BF9EA ΔE 0.050
- Bright Cyan #41FDFE ΔE 0.051
- Bright Turquoise #0FFEF9 ΔE 0.053
- Turquoise #40E0D0 ΔE 0.054
- Cyan #00FFFF ΔE 0.054
- Robin Egg Blue #8AF1FE ΔE 0.055
Use #42EAF6 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.