#428CC8#428CC8

#428CC8 is a mid, moderate cyan. Relative luminance 0.241; OKLCH L 62.0% C 0.117 H 245.8°. Best body text is #000000 at 5.82:1 contrast (WCAG AA passes).

Color values

HEX	#428CC8
RGB	rgb(66, 140, 200)
HSL	hsl(207, 55%, 52%)
HSV	hsv(207, 67%, 78%)
CMYK	cmyk(67%, 30%, 0%, 21.6%)
CIE-LAB	lab(56.17, -3.87, -37.81)
CIE-LCH	lch(56.17, 38.00, 264.16°)
OKLab	oklab(61.98% -0.048 -0.1068)
OKLCH	oklch(61.98% 0.117 245.8)
XYZ	xyz(22.0462, 24.0822, 58.1189)
Luminance	0.2409 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#428CC8 #C87E42

analogous

#42C8C1 #428CC8 #4249C8

triadic

#428CC8 #C8428C #8CC842

tetradic

#428CC8 #C142C8 #C87E42 #49C842

square

#428CC8 #C142C8 #C87E42 #49C842

split-complementary

#428CC8 #C84249 #C8C142

monochromatic

#204C6F #2E6C9F #428CC8 #71A9D6 #A1C6E4

Accessibility & contrast

On white

3.61

#428CC8 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.82

#428CC8 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #428CC8

5.82:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##428CC8	#FFFFFF	#000000	##000000
##428CC8	1.00	3.61	5.82	5.82
#FFFFFF	3.61	1.00	21.00	21.00
#000000	5.82	21.00	1.00	1.00
##000000	5.82	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#718ECB

Deuteranopia (green-blind)

#5F81C7

Tritanopia (blue-blind)

#009AA1

Achromatopsia (no color)

#878787

Design tokens & code

CSS

--color: #428cc8;
/* rgb */ color: rgb(66, 140, 200);
/* oklch */ color: oklch(62.0% 0.117 245.8);

Tailwind

colors: {
  custom: {
    50: '#84add9',
    500: '#428cc8',
    950: '#000000',
  },
}

SCSS

$custom: #428cc8;
$custom-light: #84add9;
$custom-dark: #000000;

JSON

{
  "hex": "#428cc8",
  "rgb": {
    "r": 66,
    "g": 140,
    "b": 200
  },
  "hsl": {
    "h": 206.866,
    "s": 54.918,
    "l": 52.157
  },
  "oklch": {
    "l": 0.61982,
    "c": 0.11712,
    "h": 245.8
  },
  "luminance": 0.24085
}

Semantic roles & 50–950 ramp

primary

#428CC8

secondary

#D0B096

accent

#8C4ADE

background

#F8FAFD

surface

#F0F4FA

border

#CBCED3

text

#0C1014

muted

#7D7F83

Preview Lab

Preview with #428CC8

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

Preview Lab → · Contrast checker → · Palette generator →