#4279CC#4279CC

#4279CC is a mid, vivid blue. Relative luminance 0.192; OKLCH L 57.9% C 0.141 H 258.5°. Best body text is #000000 at 4.84:1 contrast (WCAG AA passes).

Color values

HEX	#4279CC
RGB	rgb(66, 121, 204)
HSL	hsl(216, 58%, 53%)
HSV	hsv(216, 68%, 80%)
CMYK	cmyk(67.6%, 40.7%, 0%, 20%)
CIE-LAB	lab(50.91, 8.89, -48.39)
CIE-LCH	lch(50.91, 49.20, 280.41°)
OKLab	oklab(57.93% -0.0281 -0.138)
OKLCH	oklch(57.93% 0.141 258.5)
XYZ	xyz(19.9793, 19.1906, 59.7663)
Luminance	0.1919 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#4279CC #CC9542

analogous

#42BECC #4279CC #5042CC

triadic

#4279CC #CC4279 #79CC42

tetradic

#4279CC #CC42BE #CC9542 #42CC50

square

#4279CC #CC42BE #CC9542 #42CC50

split-complementary

#4279CC #CC5042 #BECC42

monochromatic

#1F4174 #2C5CA4 #4279CC #729BD9 #A2BDE6

Accessibility & contrast

On white

4.34

#4279CC on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

4.84

#4279CC on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #4279CC

4.84:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##4279CC	#FFFFFF	#000000	##000000
##4279CC	1.00	4.34	4.84	4.84
#FFFFFF	4.34	1.00	21.00	21.00
#000000	4.84	21.00	1.00	1.00
##000000	4.84	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#5380CF

Deuteranopia (green-blind)

#3D73CA

Tritanopia (blue-blind)

#008C98

Achromatopsia (no color)

#797979

Design tokens & code

CSS

--color: #4279cc;
/* rgb */ color: rgb(66, 121, 204);
/* oklch */ color: oklch(57.9% 0.141 258.5);

Tailwind

colors: {
  custom: {
    50: '#859fdc',
    500: '#4279cc',
    950: '#000000',
  },
}

SCSS

$custom: #4279cc;
$custom-light: #859fdc;
$custom-dark: #000000;

JSON

{
  "hex": "#4279cc",
  "rgb": {
    "r": 66,
    "g": 121,
    "b": 204
  },
  "hsl": {
    "h": 216.087,
    "s": 57.5,
    "l": 52.941
  },
  "oklch": {
    "l": 0.57933,
    "c": 0.14083,
    "h": 258.5
  },
  "luminance": 0.19193
}

Semantic roles & 50–950 ramp

primary

#4279CC

secondary

#D3BB97

accent

#A347E1

background

#F8F9FD

surface

#F0F2FB

border

#CBCCD4

text

#0C0E15

muted

#7D7E83

Preview Lab

Preview with #4279CC

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

Preview Lab → · Contrast checker → · Palette generator →