#42A4CC#42A4CC

#42A4CC is a light, moderate cyan. Relative luminance 0.321; OKLCH L 67.8% C 0.108 H 228.6°. Best body text is #000000 at 7.41:1 contrast (WCAG AA passes).

Color values

HEX	#42A4CC
RGB	rgb(66, 164, 204)
HSL	hsl(197, 58%, 53%)
HSV	hsv(197, 68%, 80%)
CMYK	cmyk(67.6%, 19.6%, 0%, 20%)
CIE-LAB	lab(63.40, -15.93, -28.80)
CIE-LCH	lch(63.40, 32.91, 241.05°)
OKLab	oklab(67.77% -0.0711 -0.0806)
OKLCH	oklch(67.77% 0.108 228.6)
XYZ	xyz(26.4170, 32.0659, 61.9121)
Luminance	0.3207 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#42A4CC #CC6A42

analogous

#42CCAF #42A4CC #425FCC

triadic

#42A4CC #CC42A4 #A4CC42

tetradic

#42A4CC #AF42CC #CC6A42 #5FCC42

square

#42A4CC #AF42CC #CC6A42 #5FCC42

split-complementary

#42A4CC #CC425F #CCAF42

monochromatic

#1F5C74 #2C82A4 #42A4CC #72BBD9 #A2D2E6

Accessibility & contrast

On white

2.83

#42A4CC on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

7.41

#42A4CC on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #42A4CC

7.41:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##42A4CC	#FFFFFF	#000000	##000000
##42A4CC	1.00	2.83	7.41	7.41
#FFFFFF	2.83	1.00	21.00	21.00
#000000	7.41	21.00	1.00	1.00
##000000	7.41	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#8FA1CE

Deuteranopia (green-blind)

#7C93CB

Tritanopia (blue-blind)

#00AFB1

Achromatopsia (no color)

#999999

Design tokens & code

CSS

--color: #42a4cc;
/* rgb */ color: rgb(66, 164, 204);
/* oklch */ color: oklch(67.8% 0.108 228.6);

Tailwind

colors: {
  custom: {
    50: '#86bfdb',
    500: '#42a4cc',
    950: '#000000',
  },
}

SCSS

$custom: #42a4cc;
$custom-light: #86bfdb;
$custom-dark: #000000;

JSON

{
  "hex": "#42a4cc",
  "rgb": {
    "r": 66,
    "g": 164,
    "b": 204
  },
  "hsl": {
    "h": 197.391,
    "s": 57.5,
    "l": 52.941
  },
  "oklch": {
    "l": 0.67775,
    "c": 0.10752,
    "h": 228.6
  },
  "luminance": 0.32069
}

Semantic roles & 50–950 ramp

primary

#42A4CC

secondary

#D3A897

accent

#7447E1

background

#F8FBFD

surface

#F0F7FB

border

#CBD0D4

text

#0C1215

muted

#7D8183

Preview Lab

Preview with #42A4CC

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

Preview Lab → · Contrast checker → · Palette generator →