#42E7F7
Closest named color: Robin's Egg (#6DEDFD). oklch(85.2% 0.132 204.7), rgb(66, 231, 247).
Aa
Black text reads best on this color (14.00:1).
About this color
#42E7F7 is a light, moderately saturated teal or cyan. In OKLCH its lightness is 85%, its chroma 0.132 and its hue 205°. Its hue sits on the cool side of the wheel. The nearest named color is Robin's Egg (#6DEDFD), ΔE 0.032 away. Black text reads best on it, at 14.00:1.
| Hue family | Teals and cyans |
| Lightness | light (85%) |
| Chroma | moderately saturated (0.132) |
| Temperature | cool |
| Nearest name | Robin's Egg (#6DEDFD) |
| Black text | 14.00:1 |
| White text | 1.49:1 |
Values
| HEX | #42E7F7 |
| RGB | rgb(66, 231, 247) |
| HSL | hsl(185, 92%, 61%) |
| OKLCH | oklch(85.2% 0.132 204.7) |
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 #42E7F7 | 1.49:1 | Fails | Lc -26.1 | Dividers and decoration only |
| Black text on #42E7F7 | 14.00:1 | AAA | Lc 80.8 | Fine for body text |
| #42E7F7 text on white | 1.49:1 | Fails | Lc 23.0 | Dividers and decoration only |
| #42E7F7 text on black | 14.00:1 | AAA | Lc -80.3 | 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
#E5FAFD
oklch(97.1% 0.022 207.1)
-
Step 100
100
#C5F4F9
oklch(93.6% 0.048 204.4)
-
Step 200
200 (this color)
#42E7F7
oklch(85.2% 0.132 204.7)
-
Step 300
300
#00D9EA
oklch(80.8% 0.138 204.8)
-
Step 400
400
#00B6C4
oklch(70.8% 0.121 204.6)
-
Step 500
500
#009CA8
oklch(63.2% 0.108 204.4)
-
Step 600
600
#00838D
oklch(55.6% 0.095 204.2)
-
Step 700
700
#006E77
oklch(49.1% 0.084 204.7)
-
Step 800
800
#005A62
oklch(42.7% 0.073 205.3)
-
Step 900
900
#004B52
oklch(37.7% 0.064 205.5)
-
Step 950
950
#002D31
oklch(27.1% 0.046 204.1)
#42E7F7 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) | #D4DEF8 | 0.130 |
| Deuteranopia (no green cones) | #BBCBF8 | 0.120 |
| Tritanopia (no blue cones) | #00F1EC | 0.038 |
| Achromatopsia (no color) | #D3D3D3 | 0.133 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #42E7F7
#42E7F7
oklch(85.2% 0.132 204.7)
- #FFBBB5
#FFBBB5
oklch(85.3% 0.08 24.6)
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 #42E7F7, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Robin's Egg #6DEDFD ΔE 0.032
- Bright Light Blue #26F7FD ΔE 0.042
- Aqua Blue #02D8E9 ΔE 0.048
- Turquoise #40E0D0 ΔE 0.054
- Bright Aqua #0BF9EA ΔE 0.059
- Robin Egg Blue #8AF1FE ΔE 0.059
- Bright Cyan #41FDFE ΔE 0.059
- Bright Turquoise #0FFEF9 ΔE 0.062
Use #42E7F7 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.