#4378CC#4378CC

#4378CC is a mid, vivid blue. Relative luminance 0.190; OKLCH L 57.8% C 0.142 H 259.3°. Best body text is #000000 at 4.80:1 contrast (WCAG AA passes).

Color values

HEX	#4378CC
RGB	rgb(67, 120, 204)
HSL	hsl(217, 57%, 53%)
HSV	hsv(217, 67%, 80%)
CMYK	cmyk(67.2%, 41.2%, 0%, 20%)
CIE-LAB	lab(50.67, 9.67, -48.78)
CIE-LCH	lch(50.67, 49.72, 281.21°)
OKLab	oklab(57.76% -0.0264 -0.1391)
OKLCH	oklch(57.76% 0.142 259.3)
XYZ	xyz(19.9264, 18.9839, 59.7292)
Luminance	0.1899 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#4378CC #CC9743

analogous

#43BDCC #4378CC #5243CC

triadic

#4378CC #CC4378 #78CC43

tetradic

#4378CC #CC43BD #CC9743 #43CC52

square

#4378CC #CC43BD #CC9743 #43CC52

split-complementary

#4378CC #CC5243 #BDCC43

monochromatic

#204175 #2D5BA5 #4378CC #739BD9 #A3BDE6

Accessibility & contrast

On white

4.38

#4378CC on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

4.80

#4378CC on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #4378CC

4.80:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##4378CC	#FFFFFF	#000000	##000000
##4378CC	1.00	4.38	4.80	4.80
#FFFFFF	4.38	1.00	21.00	21.00
#000000	4.80	21.00	1.00	1.00
##000000	4.80	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#517FCF

Deuteranopia (green-blind)

#3C73CA

Tritanopia (blue-blind)

#008B98

Achromatopsia (no color)

#797979

Design tokens & code

CSS

--color: #4378cc;
/* rgb */ color: rgb(67, 120, 204);
/* oklch */ color: oklch(57.8% 0.142 259.3);

Tailwind

colors: {
  custom: {
    50: '#859edc',
    500: '#4378cc',
    950: '#000000',
  },
}

SCSS

$custom: #4378cc;
$custom-light: #859edc;
$custom-dark: #000000;

JSON

{
  "hex": "#4378cc",
  "rgb": {
    "r": 67,
    "g": 120,
    "b": 204
  },
  "hsl": {
    "h": 216.788,
    "s": 57.322,
    "l": 53.137
  },
  "oklch": {
    "l": 0.57758,
    "c": 0.14158,
    "h": 259.3
  },
  "luminance": 0.18986
}

Semantic roles & 50–950 ramp

primary

#4378CC

secondary

#D3BC98

accent

#A547E1

background

#F8F9FD

surface

#F0F2FB

border

#CBCCD4

text

#0C0E15

muted

#7D7E83

Preview Lab

Preview with #4378CC

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

Preview Lab → · Contrast checker → · Palette generator →