#428EB7#428EB7

#428EB7 is a mid, moderate cyan. Relative luminance 0.239; OKLCH L 61.6% C 0.097 H 235.0°. Best body text is #000000 at 5.78:1 contrast (WCAG AA passes).

Color values

HEX	#428EB7
RGB	rgb(66, 142, 183)
HSL	hsl(201, 47%, 49%)
HSV	hsv(201, 64%, 72%)
CMYK	cmyk(63.9%, 22.4%, 0%, 28.2%)
CIE-LAB	lab(56.01, -10.71, -28.41)
CIE-LCH	lch(56.01, 30.36, 249.35°)
OKLab	oklab(61.61% -0.0557 -0.0796)
OKLCH	oklch(61.61% 0.097 235)
XYZ	xyz(20.4637, 23.9211, 48.3293)
Luminance	0.2392 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#428EB7 #B76B42

analogous

#42B7A6 #428EB7 #4254B7

triadic

#428EB7 #B7428E #8EB742

tetradic

#428EB7 #A642B7 #B76B42 #54B742

square

#428EB7 #A642B7 #B76B42 #54B742

split-complementary

#428EB7 #B74254 #B7A642

monochromatic

#22485D #326B8A #428EB7 #6CA9CA #99C3DA

Accessibility & contrast

On white

3.63

#428EB7 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.78

#428EB7 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #428EB7

5.78:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##428EB7	#FFFFFF	#000000	##000000
##428EB7	1.00	3.63	5.78	5.78
#FFFFFF	3.63	1.00	21.00	21.00
#000000	5.78	21.00	1.00	1.00
##000000	5.78	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#7A8DB9

Deuteranopia (green-blind)

#6A81B6

Tritanopia (blue-blind)

#00999C

Achromatopsia (no color)

#868686

Design tokens & code

CSS

--color: #428eb7;
/* rgb */ color: rgb(66, 142, 183);
/* oklch */ color: oklch(61.6% 0.097 235.0);

Tailwind

colors: {
  custom: {
    50: '#82afcc',
    500: '#428eb7',
    950: '#000000',
  },
}

SCSS

$custom: #428eb7;
$custom-light: #82afcc;
$custom-dark: #000000;

JSON

{
  "hex": "#428eb7",
  "rgb": {
    "r": 66,
    "g": 142,
    "b": 183
  },
  "hsl": {
    "h": 201.026,
    "s": 46.988,
    "l": 48.824
  },
  "oklch": {
    "l": 0.61606,
    "c": 0.09719,
    "h": 235
  },
  "luminance": 0.23923
}

Semantic roles & 50–950 ramp

primary

#428EB7

secondary

#C6A28F

accent

#8051D7

background

#F8FAFC

surface

#F0F4F9

border

#CBCED2

text

#0B1013

muted

#7C7F82

Preview Lab

Preview with #428EB7

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

Preview Lab → · Contrast checker → · Palette generator →