#428EB2#428EB2

#428EB2 is a mid, moderate cyan. Relative luminance 0.237; OKLCH L 61.4% C 0.092 H 231.5°. Best body text is #000000 at 5.74:1 contrast (WCAG AA passes).

Color values

HEX	#428EB2
RGB	rgb(66, 142, 178)
HSL	hsl(199, 46%, 48%)
HSV	hsv(199, 63%, 70%)
CMYK	cmyk(62.9%, 20.2%, 0%, 30.2%)
CIE-LAB	lab(55.80, -12.34, -25.88)
CIE-LCH	lch(55.80, 28.67, 244.51°)
OKLab	oklab(61.38% -0.0575 -0.0724)
OKLCH	oklch(61.38% 0.092 231.5)
XYZ	xyz(19.9525, 23.7166, 45.6371)
Luminance	0.2372 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#428EB2 #B26642

analogous

#42B29E #428EB2 #4256B2

triadic

#428EB2 #B2428E #8EB242

tetradic

#428EB2 #9E42B2 #B26642 #56B242

square

#428EB2 #9E42B2 #B26642 #56B242

split-complementary

#428EB2 #B24256 #B29E42

monochromatic

#214759 #316A85 #428EB2 #6AA9C8 #96C3D8

Accessibility & contrast

On white

3.66

#428EB2 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.74

#428EB2 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #428EB2

5.74:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##428EB2	#FFFFFF	#000000	##000000
##428EB2	1.00	3.66	5.74	5.74
#FFFFFF	3.66	1.00	21.00	21.00
#000000	5.74	21.00	1.00	1.00
##000000	5.74	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#7C8CB4

Deuteranopia (green-blind)

#6C81B1

Tritanopia (blue-blind)

#00989A

Achromatopsia (no color)

#868686

Design tokens & code

CSS

--color: #428eb2;
/* rgb */ color: rgb(66, 142, 178);
/* oklch */ color: oklch(61.4% 0.092 231.5);

Tailwind

colors: {
  custom: {
    50: '#81afc9',
    500: '#428eb2',
    950: '#000000',
  },
}

SCSS

$custom: #428eb2;
$custom-light: #81afc9;
$custom-dark: #000000;

JSON

{
  "hex": "#428eb2",
  "rgb": {
    "r": 66,
    "g": 142,
    "b": 178
  },
  "hsl": {
    "h": 199.286,
    "s": 45.902,
    "l": 47.843
  },
  "oklch": {
    "l": 0.61375,
    "c": 0.09244,
    "h": 231.5
  },
  "luminance": 0.23719
}

Semantic roles & 50–950 ramp

primary

#428EB2

secondary

#C49E8C

accent

#7C52D6

background

#F8FAFC

surface

#EFF4F8

border

#CACED1

text

#0B1013

muted

#7C7F82

Preview Lab

Preview with #428EB2

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

Preview Lab → · Contrast checker → · Palette generator →