#4279CF#4279CF

#4279CF is a mid, vivid blue. Relative luminance 0.193; OKLCH L 58.1% C 0.145 H 259.0°. Best body text is #000000 at 4.87:1 contrast (WCAG AA passes).

Color values

HEX	#4279CF
RGB	rgb(66, 121, 207)
HSL	hsl(217, 59%, 54%)
HSV	hsv(217, 68%, 81%)
CMYK	cmyk(68.1%, 41.5%, 0%, 18.8%)
CIE-LAB	lab(51.08, 9.95, -49.83)
CIE-LCH	lch(51.08, 50.82, 281.30°)
OKLab	oklab(58.12% -0.0275 -0.1422)
OKLCH	oklch(58.12% 0.145 259)
XYZ	xyz(20.3426, 19.3359, 61.6795)
Luminance	0.1934 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#4279CF #CF9842

analogous

#42BFCF #4279CF #5142CF

triadic

#4279CF #CF4279 #79CF42

tetradic

#4279CF #CF42BF #CF9842 #42CF51

square

#4279CF #CF42BF #CF9842 #42CF51

split-complementary

#4279CF #CF5142 #BFCF42

monochromatic

#1F4178 #2B5CA9 #4279CF #739CDB #A4BEE8

Accessibility & contrast

On white

4.31

#4279CF on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

4.87

#4279CF on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #4279CF

4.87:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##4279CF	#FFFFFF	#000000	##000000
##4279CF	1.00	4.31	4.87	4.87
#FFFFFF	4.31	1.00	21.00	21.00
#000000	4.87	21.00	1.00	1.00
##000000	4.87	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#5181D2

Deuteranopia (green-blind)

#3A74CD

Tritanopia (blue-blind)

#008D9A

Achromatopsia (no color)

#7A7A7A

Design tokens & code

CSS

--color: #4279cf;
/* rgb */ color: rgb(66, 121, 207);
/* oklch */ color: oklch(58.1% 0.145 259.0);

Tailwind

colors: {
  custom: {
    50: '#859fde',
    500: '#4279cf',
    950: '#000000',
  },
}

SCSS

$custom: #4279cf;
$custom-light: #859fde;
$custom-dark: #000000;

JSON

{
  "hex": "#4279cf",
  "rgb": {
    "r": 66,
    "g": 121,
    "b": 207
  },
  "hsl": {
    "h": 216.596,
    "s": 59.494,
    "l": 53.529
  },
  "oklch": {
    "l": 0.58118,
    "c": 0.14485,
    "h": 259
  },
  "luminance": 0.19338
}

Semantic roles & 50–950 ramp

primary

#4279CF

secondary

#D5BD98

accent

#A545E3

background

#F8F9FD

surface

#F0F2FB

border

#CBCCD4

text

#0C0E15

muted

#7D7E83

Preview Lab

Preview with #4279CF

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

Preview Lab → · Contrast checker → · Palette generator →