#428CBE#428CBE

#428CBE is a mid, moderate cyan. Relative luminance 0.236; OKLCH L 61.5% C 0.106 H 241.0°. Best body text is #000000 at 5.73:1 contrast (WCAG AA passes).

Color values

HEX	#428CBE
RGB	rgb(66, 140, 190)
HSL	hsl(204, 49%, 50%)
HSV	hsv(204, 65%, 75%)
CMYK	cmyk(65.3%, 26.3%, 0%, 25.5%)
CIE-LAB	lab(55.72, -7.25, -32.85)
CIE-LCH	lch(55.72, 33.64, 257.55°)
OKLab	oklab(61.47% -0.0512 -0.0924)
OKLCH	oklch(61.47% 0.106 241)
XYZ	xyz(20.9156, 23.6300, 52.1640)
Luminance	0.2363 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#428CBE #BE7442

analogous

#42BEB2 #428CBE #424EBE

triadic

#428CBE #BE428C #8CBE42

tetradic

#428CBE #B242BE #BE7442 #4EBE42

square

#428CBE #B242BE #BE7442 #4EBE42

split-complementary

#428CBE #BE424E #BEB242

monochromatic

#224963 #326B91 #428CBE #70A8CE #9DC3DD

Accessibility & contrast

On white

3.67

#428CBE on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.73

#428CBE on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #428CBE

5.73:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##428CBE	#FFFFFF	#000000	##000000
##428CBE	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)

#758CC0

Deuteranopia (green-blind)

#6480BD

Tritanopia (blue-blind)

#00989D

Achromatopsia (no color)

#858585

Design tokens & code

CSS

--color: #428cbe;
/* rgb */ color: rgb(66, 140, 190);
/* oklch */ color: oklch(61.5% 0.106 241.0);

Tailwind

colors: {
  custom: {
    50: '#83add1',
    500: '#428cbe',
    950: '#000000',
  },
}

SCSS

$custom: #428cbe;
$custom-light: #83add1;
$custom-dark: #000000;

JSON

{
  "hex": "#428cbe",
  "rgb": {
    "r": 66,
    "g": 140,
    "b": 190
  },
  "hsl": {
    "h": 204.194,
    "s": 48.819,
    "l": 50.196
  },
  "oklch": {
    "l": 0.61473,
    "c": 0.10567,
    "h": 241
  },
  "luminance": 0.23632
}

Semantic roles & 50–950 ramp

primary

#428CBE

secondary

#CAA992

accent

#874FD8

background

#F8FAFC

surface

#F0F4F9

border

#CBCED2

text

#0C1014

muted

#7D7F82

Preview Lab

Preview with #428CBE

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

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