#428BC8#428BC8

#428BC8 is a mid, moderate cyan. Relative luminance 0.238; OKLCH L 61.8% C 0.118 H 246.5°. Best body text is #000000 at 5.76:1 contrast (WCAG AA passes).

Color values

HEX	#428BC8
RGB	rgb(66, 139, 200)
HSL	hsl(207, 55%, 52%)
HSV	hsv(207, 67%, 78%)
CMYK	cmyk(67%, 30.5%, 0%, 21.6%)
CIE-LAB	lab(55.88, -3.29, -38.26)
CIE-LCH	lch(55.88, 38.40, 265.09°)
OKLab	oklab(61.75% -0.047 -0.1081)
OKLCH	oklch(61.75% 0.118 246.5)
XYZ	xyz(21.9008, 23.7913, 58.0704)
Luminance	0.2379 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#428BC8 #C87F42

analogous

#42C8C2 #428BC8 #4248C8

triadic

#428BC8 #C8428B #8BC842

tetradic

#428BC8 #C242C8 #C87F42 #48C842

square

#428BC8 #C242C8 #C87F42 #48C842

split-complementary

#428BC8 #C84248 #C8C242

monochromatic

#204B6F #2E6B9F #428BC8 #71A8D6 #A1C5E4

Accessibility & contrast

On white

3.65

#428BC8 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.76

#428BC8 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #428BC8

5.76:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##428BC8	#FFFFFF	#000000	##000000
##428BC8	1.00	3.65	5.76	5.76
#FFFFFF	3.65	1.00	21.00	21.00
#000000	5.76	21.00	1.00	1.00
##000000	5.76	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#708DCB

Deuteranopia (green-blind)

#5D80C7

Tritanopia (blue-blind)

#009AA1

Achromatopsia (no color)

#868686

Design tokens & code

CSS

--color: #428bc8;
/* rgb */ color: rgb(66, 139, 200);
/* oklch */ color: oklch(61.8% 0.118 246.5);

Tailwind

colors: {
  custom: {
    50: '#84acd9',
    500: '#428bc8',
    950: '#000000',
  },
}

SCSS

$custom: #428bc8;
$custom-light: #84acd9;
$custom-dark: #000000;

JSON

{
  "hex": "#428bc8",
  "rgb": {
    "r": 66,
    "g": 139,
    "b": 200
  },
  "hsl": {
    "h": 207.313,
    "s": 54.918,
    "l": 52.157
  },
  "oklch": {
    "l": 0.61752,
    "c": 0.11793,
    "h": 246.5
  },
  "luminance": 0.23794
}

Semantic roles & 50–950 ramp

primary

#428BC8

secondary

#D0B096

accent

#8D4ADE

background

#F8FAFD

surface

#F0F4FA

border

#CBCED3

text

#0C1014

muted

#7D7F83

Preview Lab

Preview with #428BC8

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

Preview Lab → · Contrast checker → · Palette generator →