#4278C4#4278C4

#4278C4 is a mid, vivid blue. Relative luminance 0.186; OKLCH L 57.2% C 0.131 H 257.3°. Best body text is #000000 at 4.72:1 contrast (WCAG AA passes).

Color values

HEX	#4278C4
RGB	rgb(66, 120, 196)
HSL	hsl(215, 52%, 51%)
HSV	hsv(215, 66%, 77%)
CMYK	cmyk(66.3%, 38.8%, 0%, 23.1%)
CIE-LAB	lab(50.19, 6.68, -44.98)
CIE-LCH	lch(50.19, 45.47, 278.44°)
OKLab	oklab(57.23% -0.0289 -0.128)
OKLCH	oklch(57.23% 0.131 257.3)
XYZ	xyz(18.9235, 18.5748, 54.8019)
Luminance	0.1858 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#4278C4 #C48E42

analogous

#42B9C4 #4278C4 #4D42C4

triadic

#4278C4 #C44278 #78C442

tetradic

#4278C4 #C442B9 #C48E42 #42C44D

square

#4278C4 #C442B9 #C48E42 #42C44D

split-complementary

#4278C4 #C44D42 #B9C442

monochromatic

#21406A #305B99 #4278C4 #7199D3 #9FBBE1

Accessibility & contrast

On white

4.45

#4278C4 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

4.72

#4278C4 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #4278C4

4.72:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##4278C4	#FFFFFF	#000000	##000000
##4278C4	1.00	4.45	4.72	4.72
#FFFFFF	4.45	1.00	21.00	21.00
#000000	4.72	21.00	1.00	1.00
##000000	4.72	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#567EC7

Deuteranopia (green-blind)

#4372C2

Tritanopia (blue-blind)

#008994

Achromatopsia (no color)

#777777

Design tokens & code

CSS

--color: #4278c4;
/* rgb */ color: rgb(66, 120, 196);
/* oklch */ color: oklch(57.2% 0.131 257.3);

Tailwind

colors: {
  custom: {
    50: '#849ed6',
    500: '#4278c4',
    950: '#000000',
  },
}

SCSS

$custom: #4278c4;
$custom-light: #849ed6;
$custom-dark: #000000;

JSON

{
  "hex": "#4278c4",
  "rgb": {
    "r": 66,
    "g": 120,
    "b": 196
  },
  "hsl": {
    "h": 215.077,
    "s": 52.419,
    "l": 51.373
  },
  "oklch": {
    "l": 0.57229,
    "c": 0.13121,
    "h": 257.3
  },
  "luminance": 0.18577
}

Semantic roles & 50–950 ramp

primary

#4278C4

secondary

#CEB694

accent

#A04CDC

background

#F8F9FD

surface

#F0F2FA

border

#CBCCD3

text

#0C0E14

muted

#7D7E83

Preview Lab

Preview with #4278C4

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

Preview Lab → · Contrast checker → · Palette generator →