#4278D4#4278D4

#4278D4 is a mid, vivid blue. Relative luminance 0.193; OKLCH L 58.2% C 0.153 H 260.3°. Best body text is #000000 at 4.87:1 contrast (WCAG AA passes).

Color values

HEX	#4278D4
RGB	rgb(66, 120, 212)
HSL	hsl(218, 63%, 55%)
HSV	hsv(218, 69%, 83%)
CMYK	cmyk(68.9%, 43.4%, 0%, 16.9%)
CIE-LAB	lab(51.09, 12.35, -52.66)
CIE-LCH	lch(51.09, 54.09, 283.20°)
OKLab	oklab(58.22% -0.0256 -0.1505)
OKLCH	oklch(58.22% 0.153 260.3)
XYZ	xyz(20.8426, 19.3425, 64.9096)
Luminance	0.1935 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#4278D4 #D49E42

analogous

#42C1D4 #4278D4 #5542D4

triadic

#4278D4 #D44278 #78D442

tetradic

#4278D4 #D442C1 #D49E42 #42D455

square

#4278D4 #D442C1 #D49E42 #42D455

split-complementary

#4278D4 #D45542 #C1D442

monochromatic

#1D417F #285BB1 #4278D4 #749CDF #A6BFEB

Accessibility & contrast

On white

4.31

#4278D4 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

4.87

#4278D4 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #4278D4

4.87:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##4278D4	#FFFFFF	#000000	##000000
##4278D4	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)

#4B81D8

Deuteranopia (green-blind)

#3273D2

Tritanopia (blue-blind)

#008D9C

Achromatopsia (no color)

#7A7A7A

Design tokens & code

CSS

--color: #4278d4;
/* rgb */ color: rgb(66, 120, 212);
/* oklch */ color: oklch(58.2% 0.153 260.3);

Tailwind

colors: {
  custom: {
    50: '#869ee2',
    500: '#4278d4',
    950: '#000000',
  },
}

SCSS

$custom: #4278d4;
$custom-light: #869ee2;
$custom-dark: #000000;

JSON

{
  "hex": "#4278d4",
  "rgb": {
    "r": 66,
    "g": 120,
    "b": 212
  },
  "hsl": {
    "h": 217.808,
    "s": 62.931,
    "l": 54.51
  },
  "oklch": {
    "l": 0.58217,
    "c": 0.15269,
    "h": 260.3
  },
  "luminance": 0.19345
}

Semantic roles & 50–950 ramp

primary

#4278D4

secondary

#D8C19A

accent

#A942E6

background

#F8F9FD

surface

#F0F2FB

border

#CBCCD4

text

#0C0E15

muted

#7D7E83

Preview Lab

Preview with #4278D4

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

Preview Lab → · Contrast checker → · Palette generator →