#4278CE#4278CE

#4278CE is a mid, vivid blue. Relative luminance 0.190; OKLCH L 57.8% C 0.145 H 259.3°. Best body text is #000000 at 4.81:1 contrast (WCAG AA passes).

Color values

HEX	#4278CE
RGB	rgb(66, 120, 206)
HSL	hsl(217, 59%, 53%)
HSV	hsv(217, 68%, 81%)
CMYK	cmyk(68%, 41.7%, 0%, 19.2%)
CIE-LAB	lab(50.74, 10.22, -49.80)
CIE-LCH	lch(50.74, 50.84, 281.59°)
OKLab	oklab(57.84% -0.0268 -0.1421)
OKLCH	oklch(57.84% 0.145 259.3)
XYZ	xyz(20.0998, 19.0454, 60.9974)
Luminance	0.1905 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#4278CE #CE9842

analogous

#42BECE #4278CE #5242CE

triadic

#4278CE #CE4278 #78CE42

tetradic

#4278CE #CE42BE #CE9842 #42CE52

square

#4278CE #CE42BE #CE9842 #42CE52

split-complementary

#4278CE #CE5242 #BECE42

monochromatic

#1F4177 #2B5BA7 #4278CE #739BDB #A3BDE7

Accessibility & contrast

On white

4.37

#4278CE on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

4.81

#4278CE on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #4278CE

4.81:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##4278CE	#FFFFFF	#000000	##000000
##4278CE	1.00	4.37	4.81	4.81
#FFFFFF	4.37	1.00	21.00	21.00
#000000	4.81	21.00	1.00	1.00
##000000	4.81	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#5080D1

Deuteranopia (green-blind)

#3973CC

Tritanopia (blue-blind)

#008C99

Achromatopsia (no color)

#797979

Design tokens & code

CSS

--color: #4278ce;
/* rgb */ color: rgb(66, 120, 206);
/* oklch */ color: oklch(57.8% 0.145 259.3);

Tailwind

colors: {
  custom: {
    50: '#859edd',
    500: '#4278ce',
    950: '#000000',
  },
}

SCSS

$custom: #4278ce;
$custom-light: #859edd;
$custom-dark: #000000;

JSON

{
  "hex": "#4278ce",
  "rgb": {
    "r": 66,
    "g": 120,
    "b": 206
  },
  "hsl": {
    "h": 216.857,
    "s": 58.824,
    "l": 53.333
  },
  "oklch": {
    "l": 0.57839,
    "c": 0.14463,
    "h": 259.3
  },
  "luminance": 0.19047
}

Semantic roles & 50–950 ramp

primary

#4278CE

secondary

#D4BD98

accent

#A646E2

background

#F8F9FD

surface

#F0F2FB

border

#CBCCD4

text

#0C0E15

muted

#7D7E83

Preview Lab

Preview with #4278CE

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

Preview Lab → · Contrast checker → · Palette generator →