#428DB8#428DB8

#428DB8 is a mid, moderate cyan. Relative luminance 0.237; OKLCH L 61.4% C 0.099 H 236.6°. Best body text is #000000 at 5.73:1 contrast (WCAG AA passes).

Color values

HEX	#428DB8
RGB	rgb(66, 141, 184)
HSL	hsl(202, 47%, 49%)
HSV	hsv(202, 64%, 72%)
CMYK	cmyk(64.1%, 23.4%, 0%, 27.8%)
CIE-LAB	lab(55.75, -9.82, -29.38)
CIE-LCH	lch(55.75, 30.97, 251.52°)
OKLab	oklab(61.42% -0.0543 -0.0824)
OKLCH	oklch(61.42% 0.099 236.6)
XYZ	xyz(20.4200, 23.6666, 48.8301)
Luminance	0.2367 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#428DB8 #B86D42

analogous

#42B8A8 #428DB8 #4252B8

triadic

#428DB8 #B8428D #8DB842

tetradic

#428DB8 #A842B8 #B86D42 #52B842

square

#428DB8 #A842B8 #B86D42 #52B842

split-complementary

#428DB8 #B84252 #B8A842

monochromatic

#22485E #326A8B #428DB8 #6DA8CB #9AC3DB

Accessibility & contrast

On white

3.66

#428DB8 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.73

#428DB8 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #428DB8

5.73:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##428DB8	#FFFFFF	#000000	##000000
##428DB8	1.00	3.66	5.73	5.73
#FFFFFF	3.66	1.00	21.00	21.00
#000000	5.73	21.00	1.00	1.00
##000000	5.73	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#798CBA

Deuteranopia (green-blind)

#6980B7

Tritanopia (blue-blind)

#00989B

Achromatopsia (no color)

#868686

Design tokens & code

CSS

--color: #428db8;
/* rgb */ color: rgb(66, 141, 184);
/* oklch */ color: oklch(61.4% 0.099 236.6);

Tailwind

colors: {
  custom: {
    50: '#82aecd',
    500: '#428db8',
    950: '#000000',
  },
}

SCSS

$custom: #428db8;
$custom-light: #82aecd;
$custom-dark: #000000;

JSON

{
  "hex": "#428db8",
  "rgb": {
    "r": 66,
    "g": 141,
    "b": 184
  },
  "hsl": {
    "h": 201.864,
    "s": 47.2,
    "l": 49.02
  },
  "oklch": {
    "l": 0.61417,
    "c": 0.09869,
    "h": 236.6
  },
  "luminance": 0.23669
}

Semantic roles & 50–950 ramp

primary

#428DB8

secondary

#C7A38F

accent

#8251D7

background

#F8FAFC

surface

#F0F4F9

border

#CBCED2

text

#0B1013

muted

#7C7F82

Preview Lab

Preview with #428DB8

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

Preview Lab → · Contrast checker → · Palette generator →