#42B4CC#42B4CC

#42B4CC is a light, moderate cyan. Relative luminance 0.382; OKLCH L 71.6% C 0.106 H 214.4°. Best body text is #000000 at 8.63:1 contrast (WCAG AA passes).

Color values

HEX	#42B4CC
RGB	rgb(66, 180, 204)
HSL	hsl(190, 58%, 53%)
HSV	hsv(190, 68%, 80%)
CMYK	cmyk(67.6%, 11.8%, 0%, 20%)
CIE-LAB	lab(68.14, -24.27, -21.53)
CIE-LCH	lch(68.14, 32.44, 221.58°)
OKLab	oklab(71.57% -0.0874 -0.0599)
OKLCH	oklch(71.57% 0.106 214.4)
XYZ	xyz(29.4626, 38.1571, 62.9273)
Luminance	0.3816 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#42B4CC #CC5A42

analogous

#42CC9F #42B4CC #426FCC

triadic

#42B4CC #CC42B4 #B4CC42

tetradic

#42B4CC #9F42CC #CC5A42 #6FCC42

square

#42B4CC #9F42CC #CC5A42 #6FCC42

split-complementary

#42B4CC #CC426F #CC9F42

monochromatic

#1F6574 #2C90A4 #42B4CC #72C7D9 #A2DAE6

Accessibility & contrast

On white

2.43

#42B4CC on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

8.63

#42B4CC on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #42B4CC

8.63:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##42B4CC	#FFFFFF	#000000	##000000
##42B4CC	1.00	2.43	8.63	8.63
#FFFFFF	2.43	1.00	21.00	21.00
#000000	8.63	21.00	1.00	1.00
##000000	8.63	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#A3AECD

Deuteranopia (green-blind)

#8FA0CC

Tritanopia (blue-blind)

#00BDBB

Achromatopsia (no color)

#A6A6A6

Design tokens & code

CSS

--color: #42b4cc;
/* rgb */ color: rgb(66, 180, 204);
/* oklch */ color: oklch(71.6% 0.106 214.4);

Tailwind

colors: {
  custom: {
    50: '#87cadb',
    500: '#42b4cc',
    950: '#000000',
  },
}

SCSS

$custom: #42b4cc;
$custom-light: #87cadb;
$custom-dark: #000000;

JSON

{
  "hex": "#42b4cc",
  "rgb": {
    "r": 66,
    "g": 180,
    "b": 204
  },
  "hsl": {
    "h": 190.435,
    "s": 57.5,
    "l": 52.941
  },
  "oklch": {
    "l": 0.71573,
    "c": 0.10594,
    "h": 214.4
  },
  "luminance": 0.3816
}

Semantic roles & 50–950 ramp

primary

#42B4CC

secondary

#D3A197

accent

#6247E1

background

#F9FCFD

surface

#F1F8FB

border

#CBD1D4

text

#0D1315

muted

#7E8283

Preview Lab

Preview with #42B4CC

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

Preview Lab → · Contrast checker → · Palette generator →