#4573BB#4573BB

#4573BB is a mid, vivid blue. Relative luminance 0.171; OKLCH L 55.7% C 0.123 H 259.0°. Best body text is #FFFFFF at 4.75:1 contrast (WCAG AA passes).

Color values

HEX	#4573BB
RGB	rgb(69, 115, 187)
HSL	hsl(217, 46%, 50%)
HSV	hsv(217, 63%, 73%)
CMYK	cmyk(63.1%, 38.5%, 0%, 26.7%)
CIE-LAB	lab(48.40, 7.13, -42.62)
CIE-LCH	lch(48.40, 43.22, 279.50°)
OKLab	oklab(55.72% -0.0235 -0.1211)
OKLCH	oklch(55.72% 0.123 259)
XYZ	xyz(17.5514, 17.1129, 49.3822)
Luminance	0.1711 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#4573BB #BB8D45

analogous

#45AEBB #4573BB #5245BB

triadic

#4573BB #BB4573 #73BB45

tetradic

#4573BB #BB45AE #BB8D45 #45BB52

square

#4573BB #BB45AE #BB8D45 #45BB52

split-complementary

#4573BB #BB5245 #AEBB45

monochromatic

#243C62 #34578F #4573BB #7295CB #9FB6DC

Accessibility & contrast

On white

4.75

#4573BB on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.42

#4573BB on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #4573BB

4.75:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##4573BB	#FFFFFF	#000000	##FFFFFF
##4573BB	1.00	4.75	4.42	4.75
#FFFFFF	4.75	1.00	21.00	1.00
#000000	4.42	21.00	1.00	21.00
##FFFFFF	4.75	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#5479BE

Deuteranopia (green-blind)

#436EBA

Tritanopia (blue-blind)

#00838E

Achromatopsia (no color)

#737373

Design tokens & code

CSS

--color: #4573bb;
/* rgb */ color: rgb(69, 115, 187);
/* oklch */ color: oklch(55.7% 0.123 259.0);

Tailwind

colors: {
  custom: {
    50: '#849ad0',
    500: '#4573bb',
    950: '#000000',
  },
}

SCSS

$custom: #4573bb;
$custom-light: #849ad0;
$custom-dark: #000000;

JSON

{
  "hex": "#4573bb",
  "rgb": {
    "r": 69,
    "g": 115,
    "b": 187
  },
  "hsl": {
    "h": 216.61,
    "s": 46.457,
    "l": 50.196
  },
  "oklch": {
    "l": 0.5572,
    "c": 0.12336,
    "h": 259
  },
  "luminance": 0.17115
}

Semantic roles & 50–950 ramp

primary

#4573BB

secondary

#C8B494

accent

#A252D6

background

#F8F9FC

surface

#F0F2F9

border

#CBCCD2

text

#0C0E14

muted

#7D7E82

Preview Lab

Preview with #4573BB

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

Preview Lab → · Contrast checker → · Palette generator →