#428ABC#428ABC

#428ABC is a mid, moderate cyan. Relative luminance 0.230; OKLCH L 60.9% C 0.105 H 241.7°. Best body text is #000000 at 5.59:1 contrast (WCAG AA passes).

Color values

HEX	#428ABC
RGB	rgb(66, 138, 188)
HSL	hsl(205, 48%, 50%)
HSV	hsv(205, 65%, 74%)
CMYK	cmyk(64.9%, 26.6%, 0%, 26.3%)
CIE-LAB	lab(55.04, -6.78, -32.77)
CIE-LCH	lch(55.04, 33.46, 258.31°)
OKLab	oklab(60.91% -0.0498 -0.0922)
OKLCH	oklch(60.91% 0.105 241.7)
XYZ	xyz(20.4089, 22.9640, 50.9241)
Luminance	0.2297 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#428ABC #BC7442

analogous

#42BCB1 #428ABC #424DBC

triadic

#428ABC #BC428A #8ABC42

tetradic

#428ABC #B142BC #BC7442 #4DBC42

square

#428ABC #B142BC #BC7442 #4DBC42

split-complementary

#428ABC #BC424D #BCB142

monochromatic

#224761 #32698F #428ABC #6FA6CC #9CC2DC

Accessibility & contrast

On white

3.75

#428ABC on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.59

#428ABC on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #428ABC

5.59:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##428ABC	#FFFFFF	#000000	##000000
##428ABC	1.00	3.75	5.59	5.59
#FFFFFF	3.75	1.00	21.00	21.00
#000000	5.59	21.00	1.00	1.00
##000000	5.59	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#738ABE

Deuteranopia (green-blind)

#637EBB

Tritanopia (blue-blind)

#00969B

Achromatopsia (no color)

#848484

Design tokens & code

CSS

--color: #428abc;
/* rgb */ color: rgb(66, 138, 188);
/* oklch */ color: oklch(60.9% 0.105 241.7);

Tailwind

colors: {
  custom: {
    50: '#83acd0',
    500: '#428abc',
    950: '#000000',
  },
}

SCSS

$custom: #428abc;
$custom-light: #83acd0;
$custom-dark: #000000;

JSON

{
  "hex": "#428abc",
  "rgb": {
    "r": 66,
    "g": 138,
    "b": 188
  },
  "hsl": {
    "h": 204.59,
    "s": 48.031,
    "l": 49.804
  },
  "oklch": {
    "l": 0.60905,
    "c": 0.1048,
    "h": 241.7
  },
  "luminance": 0.22966
}

Semantic roles & 50–950 ramp

primary

#428ABC

secondary

#C9A891

accent

#8850D8

background

#F8FAFC

surface

#F0F4F9

border

#CBCED2

text

#0C1014

muted

#7D7F82

Preview Lab

Preview with #428ABC

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

Preview Lab → · Contrast checker → · Palette generator →