#3B73CB#3B73CB

#3B73CB is a mid, vivid blue. Relative luminance 0.175; OKLCH L 56.3% C 0.149 H 259.2°. Best body text is #FFFFFF at 4.67:1 contrast (WCAG AA passes).

Color values

HEX	#3B73CB
RGB	rgb(59, 115, 203)
HSL	hsl(217, 58%, 51%)
HSV	hsv(217, 71%, 80%)
CMYK	cmyk(70.9%, 43.3%, 0%, 20.4%)
CIE-LAB	lab(48.89, 11.18, -51.07)
CIE-LCH	lch(48.89, 52.28, 282.35°)
OKLab	oklab(56.27% -0.028 -0.1461)
OKLCH	oklch(56.27% 0.149 259.2)
XYZ	xyz(18.7100, 17.5011, 58.8803)
Luminance	0.1750 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3B73CB #CB933B

analogous

#3BBBCB #3B73CB #4B3BCB

triadic

#3B73CB #CB3B73 #73CB3B

tetradic

#3B73CB #CB3BBB #CB933B #3BCB4B

square

#3B73CB #CB3BBB #CB933B #3BCB4B

split-complementary

#3B73CB #CB4B3B #BBCB3B

monochromatic

#1D3D6E #2A579F #3B73CB #6B96D8 #9CB8E5

Accessibility & contrast

On white

4.67

#3B73CB on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.50

#3B73CB on #000000

AA ✓AA large ✓AAA ✗

Best text color

#FFFFFF on #3B73CB

4.67:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3B73CB	#FFFFFF	#000000	##FFFFFF
##3B73CB	1.00	4.67	4.50	4.67
#FFFFFF	4.67	1.00	21.00	1.00
#000000	4.50	21.00	1.00	21.00
##FFFFFF	4.67	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#487BCE

Deuteranopia (green-blind)

#2E6EC9

Tritanopia (blue-blind)

#008895

Achromatopsia (no color)

#747474

Design tokens & code

CSS

--color: #3b73cb;
/* rgb */ color: rgb(59, 115, 203);
/* oklch */ color: oklch(56.3% 0.149 259.2);

Tailwind

colors: {
  custom: {
    50: '#829adb',
    500: '#3b73cb',
    950: '#000000',
  },
}

SCSS

$custom: #3b73cb;
$custom-light: #829adb;
$custom-dark: #000000;

JSON

{
  "hex": "#3b73cb",
  "rgb": {
    "r": 59,
    "g": 115,
    "b": 203
  },
  "hsl": {
    "h": 216.667,
    "s": 58.065,
    "l": 51.373
  },
  "oklch": {
    "l": 0.56272,
    "c": 0.1487,
    "h": 259.2
  },
  "luminance": 0.17503
}

Semantic roles & 50–950 ramp

primary

#3B73CB

secondary

#D1B891

accent

#A547E1

background

#F8F9FD

surface

#F0F2FB

border

#CBCCD4

text

#0C0E15

muted

#7D7E83

Preview Lab

Preview with #3B73CB

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

Preview Lab → · Contrast checker → · Palette generator →