#4278D2#4278D2

#4278D2 is a mid, vivid blue. Relative luminance 0.192; OKLCH L 58.1% C 0.150 H 260.0°. Best body text is #000000 at 4.85:1 contrast (WCAG AA passes).

Color values

HEX	#4278D2
RGB	rgb(66, 120, 210)
HSL	hsl(218, 62%, 54%)
HSV	hsv(218, 69%, 82%)
CMYK	cmyk(68.6%, 42.9%, 0%, 17.6%)
CIE-LAB	lab(50.97, 11.64, -51.71)
CIE-LCH	lch(50.97, 53.00, 282.69°)
OKLab	oklab(58.09% -0.026 -0.1477)
OKLCH	oklch(58.09% 0.15 260)
XYZ	xyz(20.5919, 19.2422, 63.5892)
Luminance	0.1924 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#4278D2 #D29C42

analogous

#42C0D2 #4278D2 #5442D2

triadic

#4278D2 #D24278 #78D242

tetradic

#4278D2 #D242C0 #D29C42 #42D254

square

#4278D2 #D242C0 #D29C42 #42D254

split-complementary

#4278D2 #D25442 #C0D242

monochromatic

#1E417C #295BAD #4278D2 #739BDE #A5BFEA

Accessibility & contrast

On white

4.33

#4278D2 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

4.85

#4278D2 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #4278D2

4.85:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##4278D2	#FFFFFF	#000000	##000000
##4278D2	1.00	4.33	4.85	4.85
#FFFFFF	4.33	1.00	21.00	21.00
#000000	4.85	21.00	1.00	1.00
##000000	4.85	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#4D81D5

Deuteranopia (green-blind)

#3473D0

Tritanopia (blue-blind)

#008D9B

Achromatopsia (no color)

#797979

Design tokens & code

CSS

--color: #4278d2;
/* rgb */ color: rgb(66, 120, 210);
/* oklch */ color: oklch(58.1% 0.150 260.0);

Tailwind

colors: {
  custom: {
    50: '#869ee0',
    500: '#4278d2',
    950: '#000000',
  },
}

SCSS

$custom: #4278d2;
$custom-light: #869ee0;
$custom-dark: #000000;

JSON

{
  "hex": "#4278d2",
  "rgb": {
    "r": 66,
    "g": 120,
    "b": 210
  },
  "hsl": {
    "h": 217.5,
    "s": 61.538,
    "l": 54.118
  },
  "oklch": {
    "l": 0.5809,
    "c": 0.15001,
    "h": 260
  },
  "luminance": 0.19244
}

Semantic roles & 50–950 ramp

primary

#4278D2

secondary

#D7C099

accent

#A843E5

background

#F8F9FD

surface

#F0F2FB

border

#CBCCD4

text

#0C0E15

muted

#7D7E83

Preview Lab

Preview with #4278D2

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

Preview Lab → · Contrast checker → · Palette generator →