#4378CB#4378CB

#4378CB is a mid, vivid blue. Relative luminance 0.189; OKLCH L 57.7% C 0.140 H 259.1°. Best body text is #000000 at 4.79:1 contrast (WCAG AA passes).

Color values

HEX	#4378CB
RGB	rgb(67, 120, 203)
HSL	hsl(217, 57%, 53%)
HSV	hsv(217, 67%, 80%)
CMYK	cmyk(67%, 40.9%, 0%, 20.4%)
CIE-LAB	lab(50.61, 9.31, -48.30)
CIE-LCH	lch(50.61, 49.19, 280.91°)
OKLab	oklab(57.7% -0.0266 -0.1377)
OKLCH	oklch(57.7% 0.14 259.1)
XYZ	xyz(19.8068, 18.9360, 59.0995)
Luminance	0.1894 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#4378CB #CB9643

analogous

#43BCCB #4378CB #5243CB

triadic

#4378CB #CB4378 #78CB43

tetradic

#4378CB #CB43BC #CB9643 #43CB52

square

#4378CB #CB43BC #CB9643 #43CB52

split-complementary

#4378CB #CB5243 #BCCB43

monochromatic

#204174 #2D5BA4 #4378CB #739AD8 #A3BDE6

Accessibility & contrast

On white

4.39

#4378CB on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

4.79

#4378CB on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #4378CB

4.79:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##4378CB	#FFFFFF	#000000	##000000
##4378CB	1.00	4.39	4.79	4.79
#FFFFFF	4.39	1.00	21.00	21.00
#000000	4.79	21.00	1.00	1.00
##000000	4.79	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#527FCE

Deuteranopia (green-blind)

#3D73C9

Tritanopia (blue-blind)

#008B97

Achromatopsia (no color)

#787878

Design tokens & code

CSS

--color: #4378cb;
/* rgb */ color: rgb(67, 120, 203);
/* oklch */ color: oklch(57.7% 0.140 259.1);

Tailwind

colors: {
  custom: {
    50: '#859edb',
    500: '#4378cb',
    950: '#000000',
  },
}

SCSS

$custom: #4378cb;
$custom-light: #859edb;
$custom-dark: #000000;

JSON

{
  "hex": "#4378cb",
  "rgb": {
    "r": 67,
    "g": 120,
    "b": 203
  },
  "hsl": {
    "h": 216.618,
    "s": 56.667,
    "l": 52.941
  },
  "oklch": {
    "l": 0.57696,
    "c": 0.14024,
    "h": 259.1
  },
  "luminance": 0.18938
}

Semantic roles & 50–950 ramp

primary

#4378CB

secondary

#D2BB98

accent

#A548E0

background

#F8F9FD

surface

#F0F2FB

border

#CBCCD4

text

#0C0E15

muted

#7D7E83

Preview Lab

Preview with #4378CB

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

Preview Lab → · Contrast checker → · Palette generator →