#4B73CB#4B73CB

#4B73CB is a mid, vivid blue. Relative luminance 0.181; OKLCH L 57.0% C 0.143 H 264.0°. Best body text is #000000 at 4.61:1 contrast (WCAG AA passes).

Color values

HEX	#4B73CB
RGB	rgb(75, 115, 203)
HSL	hsl(221, 55%, 55%)
HSV	hsv(221, 63%, 80%)
CMYK	cmyk(63.1%, 43.3%, 0%, 20.4%)
CIE-LAB	lab(49.58, 13.78, -49.92)
CIE-LCH	lch(49.58, 51.79, 285.43°)
OKLab	oklab(57% -0.0149 -0.1424)
OKLCH	oklch(57% 0.143 264)
XYZ	xyz(19.8081, 18.0673, 58.9318)
Luminance	0.1807 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#4B73CB #CBA34B

analogous

#4BB3CB #4B73CB #634BCB

triadic

#4B73CB #CB4B73 #73CB4B

tetradic

#4B73CB #CB4BB3 #CBA34B #4BCB63

square

#4B73CB #CB4BB3 #CBA34B #4BCB63

split-complementary

#4B73CB #CB634B #B3CB4B

monochromatic

#233E79 #3156A8 #4B73CB #7A98D9 #AABDE6

Accessibility & contrast

On white

4.55

#4B73CB on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.61

#4B73CB on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #4B73CB

4.61:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##4B73CB	#FFFFFF	#000000	##000000
##4B73CB	1.00	4.55	4.61	4.61
#FFFFFF	4.55	1.00	21.00	21.00
#000000	4.61	21.00	1.00	1.00
##000000	4.61	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#4A7CCE

Deuteranopia (green-blind)

#3670C9

Tritanopia (blue-blind)

#008795

Achromatopsia (no color)

#767676

Design tokens & code

CSS

--color: #4b73cb;
/* rgb */ color: rgb(75, 115, 203);
/* oklch */ color: oklch(57.0% 0.143 264.0);

Tailwind

colors: {
  custom: {
    50: '#899adb',
    500: '#4b73cb',
    950: '#000000',
  },
}

SCSS

$custom: #4b73cb;
$custom-light: #899adb;
$custom-dark: #000000;

JSON

{
  "hex": "#4b73cb",
  "rgb": {
    "r": 75,
    "g": 115,
    "b": 203
  },
  "hsl": {
    "h": 221.25,
    "s": 55.172,
    "l": 54.51
  },
  "oklch": {
    "l": 0.56996,
    "c": 0.14319,
    "h": 264
  },
  "luminance": 0.18069
}

Semantic roles & 50–950 ramp

primary

#4B73CB

secondary

#D4C39E

accent

#B049DF

background

#F8F9FD

surface

#F0F2FB

border

#CBCCD4

text

#0D0E15

muted

#7D7E83

Preview Lab

Preview with #4B73CB

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

Preview Lab → · Contrast checker → · Palette generator →