#3773E0#3773E0

#3773E0 is a mid, vivid blue. Relative luminance 0.185; OKLCH L 57.5% C 0.178 H 261.2°. Best body text is #000000 at 4.69:1 contrast (WCAG AA passes).

Color values

HEX	#3773E0
RGB	rgb(55, 115, 224)
HSL	hsl(219, 73%, 55%)
HSV	hsv(219, 75%, 88%)
CMYK	cmyk(75.4%, 48.7%, 0%, 12.2%)
CIE-LAB	lab(50.04, 18.36, -61.14)
CIE-LCH	lch(50.04, 63.84, 286.71°)
OKLab	oklab(57.54% -0.0273 -0.1757)
OKLCH	oklch(57.54% 0.178 261.2)
XYZ	xyz(21.1560, 18.4531, 72.9534)
Luminance	0.1846 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3773E0 #E0A437

analogous

#37C8E0 #3773E0 #4F37E0

triadic

#3773E0 #E03773 #73E037

tetradic

#3773E0 #E037C8 #E0A437 #37E04F

square

#3773E0 #E037C8 #E0A437 #37E04F

split-complementary

#3773E0 #E04F37 #C8E037

monochromatic

#153E88 #1D56BD #3773E0 #6C98E8 #A1BDF0

Accessibility & contrast

On white

4.48

#3773E0 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

4.69

#3773E0 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #3773E0

4.69:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3773E0	#FFFFFF	#000000	##000000
##3773E0	1.00	4.48	4.69	4.69
#FFFFFF	4.48	1.00	21.00	21.00
#000000	4.69	21.00	1.00	1.00
##000000	4.69	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#337FE4

Deuteranopia (green-blind)

#0070DE

Tritanopia (blue-blind)

#008D9F

Achromatopsia (no color)

#777777

Design tokens & code

CSS

--color: #3773e0;
/* rgb */ color: rgb(55, 115, 224);
/* oklch */ color: oklch(57.5% 0.178 261.2);

Tailwind

colors: {
  custom: {
    50: '#859aea',
    500: '#3773e0',
    950: '#000000',
  },
}

SCSS

$custom: #3773e0;
$custom-light: #859aea;
$custom-dark: #000000;

JSON

{
  "hex": "#3773e0",
  "rgb": {
    "r": 55,
    "g": 115,
    "b": 224
  },
  "hsl": {
    "h": 218.698,
    "s": 73.16,
    "l": 54.706
  },
  "oklch": {
    "l": 0.57538,
    "c": 0.17786,
    "h": 261.2
  },
  "luminance": 0.18456
}

Semantic roles & 50–950 ramp

primary

#3773E0

secondary

#DDC496

accent

#AF38F0

background

#F8F9FE

surface

#F0F2FD

border

#CBCCD5

text

#0D0E16

muted

#7D7E84

Preview Lab

Preview with #3773E0

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

Preview Lab → · Contrast checker → · Palette generator →