#428EC0#428EC0

#428EC0 is a light, moderate cyan. Relative luminance 0.243; OKLCH L 62.0% C 0.107 H 240.4°. Best body text is #000000 at 5.86:1 contrast (WCAG AA passes).

Color values

HEX	#428EC0
RGB	rgb(66, 142, 192)
HSL	hsl(204, 50%, 51%)
HSV	hsv(204, 66%, 75%)
CMYK	cmyk(65.6%, 26%, 0%, 24.7%)
CIE-LAB	lab(56.39, -7.72, -32.92)
CIE-LCH	lch(56.39, 33.82, 256.80°)
OKLab	oklab(62.04% -0.0526 -0.0926)
OKLCH	oklch(62.04% 0.107 240.4)
XYZ	xyz(21.4306, 24.3078, 53.4214)
Luminance	0.2431 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#428EC0 #C07442

analogous

#42C0B3 #428EC0 #424FC0

triadic

#428EC0 #C0428E #8EC042

tetradic

#428EC0 #B342C0 #C07442 #4FC042

square

#428EC0 #B342C0 #C07442 #4FC042

split-complementary

#428EC0 #C0424F #C0B342

monochromatic

#224B66 #316D94 #428EC0 #70A9CF #9EC5DF

Accessibility & contrast

On white

3.58

#428EC0 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.86

#428EC0 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #428EC0

5.86:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##428EC0	#FFFFFF	#000000	##000000
##428EC0	1.00	3.58	5.86	5.86
#FFFFFF	3.58	1.00	21.00	21.00
#000000	5.86	21.00	1.00	1.00
##000000	5.86	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#778EC2

Deuteranopia (green-blind)

#6682BF

Tritanopia (blue-blind)

#009A9F

Achromatopsia (no color)

#878787

Design tokens & code

CSS

--color: #428ec0;
/* rgb */ color: rgb(66, 142, 192);
/* oklch */ color: oklch(62.0% 0.107 240.4);

Tailwind

colors: {
  custom: {
    50: '#83aed3',
    500: '#428ec0',
    950: '#000000',
  },
}

SCSS

$custom: #428ec0;
$custom-light: #83aed3;
$custom-dark: #000000;

JSON

{
  "hex": "#428ec0",
  "rgb": {
    "r": 66,
    "g": 142,
    "b": 192
  },
  "hsl": {
    "h": 203.81,
    "s": 50,
    "l": 50.588
  },
  "oklch": {
    "l": 0.6204,
    "c": 0.10655,
    "h": 240.4
  },
  "luminance": 0.2431
}

Semantic roles & 50–950 ramp

primary

#428EC0

secondary

#CBA993

accent

#864EDA

background

#F8FAFC

surface

#F0F4F9

border

#CBCED2

text

#0C1014

muted

#7D7F82

Preview Lab

Preview with #428EC0

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

Preview Lab → · Contrast checker → · Palette generator →