#428EB0#428EB0

#428EB0 is a mid, moderate cyan. Relative luminance 0.236; OKLCH L 61.3% C 0.091 H 230.0°. Best body text is #000000 at 5.73:1 contrast (WCAG AA passes).

Color values

HEX	#428EB0
RGB	rgb(66, 142, 176)
HSL	hsl(199, 45%, 47%)
HSV	hsv(199, 63%, 69%)
CMYK	cmyk(62.5%, 19.3%, 0%, 31%)
CIE-LAB	lab(55.72, -12.98, -24.86)
CIE-LCH	lch(55.72, 28.04, 242.43°)
OKLab	oklab(61.28% -0.0583 -0.0694)
OKLCH	oklch(61.28% 0.091 230)
XYZ	xyz(19.7532, 23.6369, 44.5872)
Luminance	0.2364 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#428EB0 #B06442

analogous

#42B09B #428EB0 #4257B0

triadic

#428EB0 #B0428E #8EB042

tetradic

#428EB0 #9B42B0 #B06442 #57B042

square

#428EB0 #9B42B0 #B06442 #57B042

split-complementary

#428EB0 #B04257 #B09B42

monochromatic

#214657 #316A83 #428EB0 #69AAC7 #95C3D7

Accessibility & contrast

On white

3.67

#428EB0 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.73

#428EB0 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #428EB0

5.73:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##428EB0	#FFFFFF	#000000	##000000
##428EB0	1.00	3.67	5.73	5.73
#FFFFFF	3.67	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)

#7D8CB2

Deuteranopia (green-blind)

#6D81B0

Tritanopia (blue-blind)

#009799

Achromatopsia (no color)

#858585

Design tokens & code

CSS

--color: #428eb0;
/* rgb */ color: rgb(66, 142, 176);
/* oklch */ color: oklch(61.3% 0.091 230.0);

Tailwind

colors: {
  custom: {
    50: '#81afc7',
    500: '#428eb0',
    950: '#000000',
  },
}

SCSS

$custom: #428eb0;
$custom-light: #81afc7;
$custom-dark: #000000;

JSON

{
  "hex": "#428eb0",
  "rgb": {
    "r": 66,
    "g": 142,
    "b": 176
  },
  "hsl": {
    "h": 198.545,
    "s": 45.455,
    "l": 47.451
  },
  "oklch": {
    "l": 0.61284,
    "c": 0.09065,
    "h": 230
  },
  "luminance": 0.23639
}

Semantic roles & 50–950 ramp

primary

#428EB0

secondary

#C39C8B

accent

#7B53D5

background

#F8FAFC

surface

#EFF4F8

border

#CACED1

text

#0B1013

muted

#7C7F82

Preview Lab

Preview with #428EB0

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

Preview Lab → · Contrast checker → · Palette generator →