#4278DC#4278DC

#4278DC is a mid, vivid blue. Relative luminance 0.198; OKLCH L 58.7% C 0.163 H 261.5°. Best body text is #000000 at 4.95:1 contrast (WCAG AA passes).

Color values

HEX	#4278DC
RGB	rgb(66, 120, 220)
HSL	hsl(219, 69%, 56%)
HSV	hsv(219, 70%, 86%)
CMYK	cmyk(70%, 45.5%, 0%, 13.7%)
CIE-LAB	lab(51.56, 15.21, -56.42)
CIE-LCH	lch(51.56, 58.44, 285.09°)
OKLab	oklab(58.74% -0.0242 -0.1616)
OKLCH	oklch(58.74% 0.163 261.5)
XYZ	xyz(21.8769, 19.7562, 70.3567)
Luminance	0.1976 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#4278DC #DCA642

analogous

#42C5DC #4278DC #5942DC

triadic

#4278DC #DC4278 #78DC42

tetradic

#4278DC #DC42C5 #DCA642 #42DC59

square

#4278DC #DC42C5 #DCA642 #42DC59

split-complementary

#4278DC #DC5942 #C5DC42

monochromatic

#1A418A #2359BE #4278DC #769DE6 #A9C2EF

Accessibility & contrast

On white

4.24

#4278DC on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

4.95

#4278DC on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #4278DC

4.95:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##4278DC	#FFFFFF	#000000	##000000
##4278DC	1.00	4.24	4.95	4.95
#FFFFFF	4.24	1.00	21.00	21.00
#000000	4.95	21.00	1.00	1.00
##000000	4.95	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#4582E0

Deuteranopia (green-blind)

#2574DA

Tritanopia (blue-blind)

#008F9F

Achromatopsia (no color)

#7B7B7B

Design tokens & code

CSS

--color: #4278dc;
/* rgb */ color: rgb(66, 120, 220);
/* oklch */ color: oklch(58.7% 0.163 261.5);

Tailwind

colors: {
  custom: {
    50: '#889ee7',
    500: '#4278dc',
    950: '#000000',
  },
}

SCSS

$custom: #4278dc;
$custom-light: #889ee7;
$custom-dark: #000000;

JSON

{
  "hex": "#4278dc",
  "rgb": {
    "r": 66,
    "g": 120,
    "b": 220
  },
  "hsl": {
    "h": 218.961,
    "s": 68.75,
    "l": 56.078
  },
  "oklch": {
    "l": 0.58736,
    "c": 0.16339,
    "h": 261.5
  },
  "luminance": 0.19758
}

Semantic roles & 50–950 ramp

primary

#4278DC

secondary

#DDC69D

accent

#AE3CEC

background

#F9F9FE

surface

#F1F2FC

border

#CBCCD5

text

#0D0E16

muted

#7E7E84

Preview Lab

Preview with #4278DC

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

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