#42A1CC#42A1CC

#42A1CC is a light, moderate cyan. Relative luminance 0.310; OKLCH L 67.1% C 0.109 H 231.2°. Best body text is #000000 at 7.20:1 contrast (WCAG AA passes).

Color values

HEX	#42A1CC
RGB	rgb(66, 161, 204)
HSL	hsl(199, 58%, 53%)
HSV	hsv(199, 68%, 80%)
CMYK	cmyk(67.6%, 21.1%, 0%, 20%)
CIE-LAB	lab(62.51, -14.31, -30.17)
CIE-LCH	lch(62.51, 33.39, 244.62°)
OKLab	oklab(67.07% -0.0681 -0.0846)
OKLCH	oklch(67.07% 0.109 231.2)
XYZ	xyz(25.8864, 31.0048, 61.7353)
Luminance	0.3101 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#42A1CC #CC6D42

analogous

#42CCB2 #42A1CC #425CCC

triadic

#42A1CC #CC42A1 #A1CC42

tetradic

#42A1CC #B242CC #CC6D42 #5CCC42

square

#42A1CC #B242CC #CC6D42 #5CCC42

split-complementary

#42A1CC #CC425C #CCB242

monochromatic

#1F5A74 #2C7FA4 #42A1CC #72B9D9 #A2D1E6

Accessibility & contrast

On white

2.92

#42A1CC on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

7.20

#42A1CC on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #42A1CC

7.20:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##42A1CC	#FFFFFF	#000000	##000000
##42A1CC	1.00	2.92	7.20	7.20
#FFFFFF	2.92	1.00	21.00	21.00
#000000	7.20	21.00	1.00	1.00
##000000	7.20	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#8B9FCE

Deuteranopia (green-blind)

#7891CB

Tritanopia (blue-blind)

#00ADAF

Achromatopsia (no color)

#979797

Design tokens & code

CSS

--color: #42a1cc;
/* rgb */ color: rgb(66, 161, 204);
/* oklch */ color: oklch(67.1% 0.109 231.2);

Tailwind

colors: {
  custom: {
    50: '#86bcdb',
    500: '#42a1cc',
    950: '#000000',
  },
}

SCSS

$custom: #42a1cc;
$custom-light: #86bcdb;
$custom-dark: #000000;

JSON

{
  "hex": "#42a1cc",
  "rgb": {
    "r": 66,
    "g": 161,
    "b": 204
  },
  "hsl": {
    "h": 198.696,
    "s": 57.5,
    "l": 52.941
  },
  "oklch": {
    "l": 0.67069,
    "c": 0.10858,
    "h": 231.2
  },
  "luminance": 0.31008
}

Semantic roles & 50–950 ramp

primary

#42A1CC

secondary

#D3AA97

accent

#7747E1

background

#F8FBFD

surface

#F0F6FB

border

#CBD0D4

text

#0C1215

muted

#7D8183

Preview Lab

Preview with #42A1CC

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

Preview Lab → · Contrast checker → · Palette generator →