#428FC3#428FC3

#428FC3 is a light, moderate cyan. Relative luminance 0.247; OKLCH L 62.4% C 0.109 H 241.1°. Best body text is #000000 at 5.95:1 contrast (WCAG AA passes).

Color values

HEX	#428FC3
RGB	rgb(66, 143, 195)
HSL	hsl(204, 52%, 51%)
HSV	hsv(204, 66%, 76%)
CMYK	cmyk(66.2%, 26.7%, 0%, 23.5%)
CIE-LAB	lab(56.82, -7.29, -33.96)
CIE-LCH	lch(56.82, 34.73, 257.89°)
OKLab	oklab(62.42% -0.0527 -0.0956)
OKLCH	oklch(62.42% 0.109 241.1)
XYZ	xyz(21.9158, 24.7410, 55.2397)
Luminance	0.2474 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#428FC3 #C37642

analogous

#42C3B6 #428FC3 #424EC3

triadic

#428FC3 #C3428F #8FC342

tetradic

#428FC3 #B642C3 #C37642 #4EC342

square

#428FC3 #B642C3 #C37642 #4EC342

split-complementary

#428FC3 #C3424E #C3B642

monochromatic

#214C69 #306E98 #428FC3 #70ABD2 #9FC6E0

Accessibility & contrast

On white

3.53

#428FC3 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.95

#428FC3 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #428FC3

5.95:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##428FC3	#FFFFFF	#000000	##000000
##428FC3	1.00	3.53	5.95	5.95
#FFFFFF	3.53	1.00	21.00	21.00
#000000	5.95	21.00	1.00	1.00
##000000	5.95	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#778FC5

Deuteranopia (green-blind)

#6683C2

Tritanopia (blue-blind)

#009CA1

Achromatopsia (no color)

#888888

Design tokens & code

CSS

--color: #428fc3;
/* rgb */ color: rgb(66, 143, 195);
/* oklch */ color: oklch(62.4% 0.109 241.1);

Tailwind

colors: {
  custom: {
    50: '#84afd5',
    500: '#428fc3',
    950: '#000000',
  },
}

SCSS

$custom: #428fc3;
$custom-light: #84afd5;
$custom-dark: #000000;

JSON

{
  "hex": "#428fc3",
  "rgb": {
    "r": 66,
    "g": 143,
    "b": 195
  },
  "hsl": {
    "h": 204.186,
    "s": 51.807,
    "l": 51.176
  },
  "oklch": {
    "l": 0.62422,
    "c": 0.10918,
    "h": 241.1
  },
  "luminance": 0.24743
}

Semantic roles & 50–950 ramp

primary

#428FC3

secondary

#CDAB94

accent

#864DDB

background

#F8FAFD

surface

#F0F4FA

border

#CBCED3

text

#0C1014

muted

#7D7F83

Preview Lab

Preview with #428FC3

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

Preview Lab → · Contrast checker → · Palette generator →