#428CA4#428CA4

#428CA4 is a mid, moderate cyan. Relative luminance 0.226; OKLCH L 60.3% C 0.082 H 222.0°. Best body text is #000000 at 5.52:1 contrast (WCAG AA passes).

Color values

HEX	#428CA4
RGB	rgb(66, 140, 164)
HSL	hsl(195, 43%, 45%)
HSV	hsv(195, 60%, 64%)
CMYK	cmyk(59.8%, 14.6%, 0%, 35.7%)
CIE-LAB	lab(54.65, -15.69, -19.63)
CIE-LCH	lch(54.65, 25.13, 231.36°)
OKLab	oklab(60.27% -0.0607 -0.0546)
OKLCH	oklch(60.27% 0.082 222)
XYZ	xyz(18.3231, 22.5930, 38.5100)
Luminance	0.2260 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#428CA4 #A45A42

analogous

#42A48B #428CA4 #425BA4

triadic

#428CA4 #A4428C #8CA442

tetradic

#428CA4 #8B42A4 #A45A42 #5BA442

square

#428CA4 #8B42A4 #A45A42 #5BA442

split-complementary

#428CA4 #A4425B #A48B42

monochromatic

#1F414D #306778 #428CA4 #63A9C0 #8FC1D2

Accessibility & contrast

On white

3.81

#428CA4 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.52

#428CA4 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #428CA4

5.52:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##428CA4	#FFFFFF	#000000	##000000
##428CA4	1.00	3.81	5.52	5.52
#FFFFFF	3.81	1.00	21.00	21.00
#000000	5.52	21.00	1.00	1.00
##000000	5.52	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#7E89A5

Deuteranopia (green-blind)

#707EA4

Tritanopia (blue-blind)

#009494

Achromatopsia (no color)

#838383

Design tokens & code

CSS

--color: #428ca4;
/* rgb */ color: rgb(66, 140, 164);
/* oklch */ color: oklch(60.3% 0.082 222.0);

Tailwind

colors: {
  custom: {
    50: '#80adbf',
    500: '#428ca4',
    950: '#000000',
  },
}

SCSS

$custom: #428ca4;
$custom-light: #80adbf;
$custom-dark: #000000;

JSON

{
  "hex": "#428ca4",
  "rgb": {
    "r": 66,
    "g": 140,
    "b": 164
  },
  "hsl": {
    "h": 194.694,
    "s": 42.609,
    "l": 45.098
  },
  "oklch": {
    "l": 0.60274,
    "c": 0.08159,
    "h": 222
  },
  "luminance": 0.22595
}

Semantic roles & 50–950 ramp

primary

#428CA4

secondary

#BD9385

accent

#7455D2

background

#F8FAFB

surface

#EFF4F7

border

#CACED0

text

#0B1012

muted

#7C7F81

Preview Lab

Preview with #428CA4

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

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