#3773CB#3773CB

#3773CB is a mid, vivid blue. Relative luminance 0.174; OKLCH L 56.1% C 0.150 H 258.1°. Best body text is #FFFFFF at 4.69:1 contrast (WCAG AA passes).

Color values

HEX	#3773CB
RGB	rgb(55, 115, 203)
HSL	hsl(216, 59%, 51%)
HSV	hsv(216, 73%, 80%)
CMYK	cmyk(72.9%, 43.3%, 0%, 20.4%)
CIE-LAB	lab(48.74, 10.62, -51.31)
CIE-LCH	lch(48.74, 52.40, 281.69°)
OKLab	oklab(56.12% -0.0308 -0.1468)
OKLCH	oklch(56.12% 0.15 258.1)
XYZ	xyz(18.4818, 17.3835, 58.8696)
Luminance	0.1739 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3773CB #CB8F37

analogous

#37BDCB #3773CB #4537CB

triadic

#3773CB #CB3773 #73CB37

tetradic

#3773CB #CB37BD #CB8F37 #37CB45

square

#3773CB #CB37BD #CB8F37 #37CB45

split-complementary

#3773CB #CB4537 #BDCB37

monochromatic

#1C3C6C #29579C #3773CB #6895D8 #98B7E4

Accessibility & contrast

On white

4.69

#3773CB on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.48

#3773CB on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3773CB

4.69:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3773CB	#FFFFFF	#000000	##FFFFFF
##3773CB	1.00	4.69	4.48	4.69
#FFFFFF	4.69	1.00	21.00	1.00
#000000	4.48	21.00	1.00	21.00
##FFFFFF	4.69	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#487BCE

Deuteranopia (green-blind)

#2C6DC9

Tritanopia (blue-blind)

#008895

Achromatopsia (no color)

#747474

Design tokens & code

CSS

--color: #3773cb;
/* rgb */ color: rgb(55, 115, 203);
/* oklch */ color: oklch(56.1% 0.150 258.1);

Tailwind

colors: {
  custom: {
    50: '#809adb',
    500: '#3773cb',
    950: '#000000',
  },
}

SCSS

$custom: #3773cb;
$custom-light: #809adb;
$custom-dark: #000000;

JSON

{
  "hex": "#3773cb",
  "rgb": {
    "r": 55,
    "g": 115,
    "b": 203
  },
  "hsl": {
    "h": 215.676,
    "s": 58.73,
    "l": 50.588
  },
  "oklch": {
    "l": 0.56118,
    "c": 0.15002,
    "h": 258.1
  },
  "luminance": 0.17385
}

Semantic roles & 50–950 ramp

primary

#3773CB

secondary

#D0B58E

accent

#A346E2

background

#F8F9FD

surface

#F0F2FB

border

#CBCCD4

text

#0C0E15

muted

#7D7E83

Preview Lab

Preview with #3773CB

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

Preview Lab → · Contrast checker → · Palette generator →