#428BC7#428BC7

#428BC7 is a mid, moderate cyan. Relative luminance 0.237; OKLCH L 61.7% C 0.117 H 246.1°. Best body text is #000000 at 5.75:1 contrast (WCAG AA passes).

Color values

HEX	#428BC7
RGB	rgb(66, 139, 199)
HSL	hsl(207, 54%, 52%)
HSV	hsv(207, 67%, 78%)
CMYK	cmyk(66.8%, 30.2%, 0%, 22%)
CIE-LAB	lab(55.83, -3.63, -37.77)
CIE-LCH	lch(55.83, 37.95, 264.51°)
OKLab	oklab(61.7% -0.0473 -0.1067)
OKLCH	oklch(61.7% 0.117 246.1)
XYZ	xyz(21.7843, 23.7447, 57.4569)
Luminance	0.2375 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#428BC7 #C77E42

analogous

#42C7C1 #428BC7 #4248C7

triadic

#428BC7 #C7428B #8BC742

tetradic

#428BC7 #C142C7 #C77E42 #48C742

square

#428BC7 #C142C7 #C77E42 #48C742

split-complementary

#428BC7 #C74248 #C7C142

monochromatic

#214B6E #2F6B9D #428BC7 #71A8D5 #A0C5E3

Accessibility & contrast

On white

3.65

#428BC7 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.75

#428BC7 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #428BC7

5.75:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##428BC7	#FFFFFF	#000000	##000000
##428BC7	1.00	3.65	5.75	5.75
#FFFFFF	3.65	1.00	21.00	21.00
#000000	5.75	21.00	1.00	1.00
##000000	5.75	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#708DCA

Deuteranopia (green-blind)

#5E80C6

Tritanopia (blue-blind)

#0099A0

Achromatopsia (no color)

#868686

Design tokens & code

CSS

--color: #428bc7;
/* rgb */ color: rgb(66, 139, 199);
/* oklch */ color: oklch(61.7% 0.117 246.1);

Tailwind

colors: {
  custom: {
    50: '#84acd8',
    500: '#428bc7',
    950: '#000000',
  },
}

SCSS

$custom: #428bc7;
$custom-light: #84acd8;
$custom-dark: #000000;

JSON

{
  "hex": "#428bc7",
  "rgb": {
    "r": 66,
    "g": 139,
    "b": 199
  },
  "hsl": {
    "h": 207.068,
    "s": 54.286,
    "l": 51.961
  },
  "oklch": {
    "l": 0.61699,
    "c": 0.11674,
    "h": 246.1
  },
  "luminance": 0.23747
}

Semantic roles & 50–950 ramp

primary

#428BC7

secondary

#D0B095

accent

#8D4ADE

background

#F8FAFD

surface

#F0F4FA

border

#CBCED3

text

#0C1014

muted

#7D7F83

Preview Lab

Preview with #428BC7

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

Preview Lab → · Contrast checker → · Palette generator →