#428EBC#428EBC

#428EBC is a mid, moderate cyan. Relative luminance 0.241; OKLCH L 61.8% C 0.102 H 238.1°. Best body text is #000000 at 5.83:1 contrast (WCAG AA passes).

Color values

HEX	#428EBC
RGB	rgb(66, 142, 188)
HSL	hsl(203, 48%, 50%)
HSV	hsv(203, 65%, 74%)
CMYK	cmyk(64.9%, 24.5%, 0%, 26.3%)
CIE-LAB	lab(56.22, -9.06, -30.92)
CIE-LCH	lch(56.22, 32.22, 253.68°)
OKLab	oklab(61.85% -0.054 -0.0869)
OKLCH	oklch(61.85% 0.102 238.1)
XYZ	xyz(20.9934, 24.1329, 51.1190)
Luminance	0.2414 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#428EBC #BC7042

analogous

#42BCAD #428EBC #4251BC

triadic

#428EBC #BC428E #8EBC42

tetradic

#428EBC #AD42BC #BC7042 #51BC42

square

#428EBC #AD42BC #BC7042 #51BC42

split-complementary

#428EBC #BC4251 #BCAD42

monochromatic

#224A61 #326C8F #428EBC #6FA9CC #9CC4DC

Accessibility & contrast

On white

3.60

#428EBC on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.83

#428EBC on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #428EBC

5.83:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##428EBC	#FFFFFF	#000000	##000000
##428EBC	1.00	3.60	5.83	5.83
#FFFFFF	3.60	1.00	21.00	21.00
#000000	5.83	21.00	1.00	1.00
##000000	5.83	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#798EBE

Deuteranopia (green-blind)

#6881BB

Tritanopia (blue-blind)

#009A9E

Achromatopsia (no color)

#878787

Design tokens & code

CSS

--color: #428ebc;
/* rgb */ color: rgb(66, 142, 188);
/* oklch */ color: oklch(61.8% 0.102 238.1);

Tailwind

colors: {
  custom: {
    50: '#83afd0',
    500: '#428ebc',
    950: '#000000',
  },
}

SCSS

$custom: #428ebc;
$custom-light: #83afd0;
$custom-dark: #000000;

JSON

{
  "hex": "#428ebc",
  "rgb": {
    "r": 66,
    "g": 142,
    "b": 188
  },
  "hsl": {
    "h": 202.623,
    "s": 48.031,
    "l": 49.804
  },
  "oklch": {
    "l": 0.61845,
    "c": 0.10228,
    "h": 238.1
  },
  "luminance": 0.24135
}

Semantic roles & 50–950 ramp

primary

#428EBC

secondary

#C9A691

accent

#8350D8

background

#F8FAFC

surface

#F0F4F9

border

#CBCED2

text

#0C1014

muted

#7D7F82

Preview Lab

Preview with #428EBC

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

Preview Lab → · Contrast checker → · Palette generator →