#42B7D5#42B7D5

#42B7D5 is a light, moderate cyan. Relative luminance 0.398; OKLCH L 72.7% C 0.111 H 218.3°. Best body text is #000000 at 8.97:1 contrast (WCAG AA passes).

Color values

HEX	#42B7D5
RGB	rgb(66, 183, 213)
HSL	hsl(192, 64%, 55%)
HSV	hsv(192, 69%, 84%)
CMYK	cmyk(69%, 14.1%, 0%, 16.5%)
CIE-LAB	lab(69.35, -23.01, -24.63)
CIE-LCH	lch(69.35, 33.70, 226.94°)
OKLab	oklab(72.65% -0.0869 -0.0687)
OKLCH	oklch(72.65% 0.111 218.3)
XYZ	xyz(31.1855, 39.8258, 68.9815)
Luminance	0.3983 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#42B7D5 #D56042

analogous

#42D5AA #42B7D5 #426ED5

triadic

#42B7D5 #D542B7 #B7D542

tetradic

#42B7D5 #AA42D5 #D56042 #6ED542

square

#42B7D5 #AA42D5 #D56042 #6ED542

split-complementary

#42B7D5 #D5426E #D5AA42

monochromatic

#1C6C80 #2896B2 #42B7D5 #74CAE0 #A6DDEB

Accessibility & contrast

On white

2.34

#42B7D5 on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

8.97

#42B7D5 on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #42B7D5

8.97:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##42B7D5	#FFFFFF	#000000	##000000
##42B7D5	1.00	2.34	8.97	8.97
#FFFFFF	2.34	1.00	21.00	21.00
#000000	8.97	21.00	1.00	1.00
##000000	8.97	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#A4B2D7

Deuteranopia (green-blind)

#8FA3D5

Tritanopia (blue-blind)

#00C1C0

Achromatopsia (no color)

#A9A9A9

Design tokens & code

CSS

--color: #42b7d5;
/* rgb */ color: rgb(66, 183, 213);
/* oklch */ color: oklch(72.7% 0.111 218.3);

Tailwind

colors: {
  custom: {
    50: '#88cce2',
    500: '#42b7d5',
    950: '#000000',
  },
}

SCSS

$custom: #42b7d5;
$custom-light: #88cce2;
$custom-dark: #000000;

JSON

{
  "hex": "#42b7d5",
  "rgb": {
    "r": 66,
    "g": 183,
    "b": 213
  },
  "hsl": {
    "h": 192.245,
    "s": 63.636,
    "l": 54.706
  },
  "oklch": {
    "l": 0.72652,
    "c": 0.11073,
    "h": 218.3
  },
  "luminance": 0.39829
}

Semantic roles & 50–950 ramp

primary

#42B7D5

secondary

#D8A79A

accent

#6341E7

background

#F9FCFD

surface

#F1F9FB

border

#CBD2D4

text

#0D1315

muted

#7E8283

Preview Lab

Preview with #42B7D5

Body copy rendered with the generated semantic roles for this colour.

Preview Lab → · Contrast checker → · Palette generator →