#3773D0#3773D0

#3773D0 is a mid, vivid blue. Relative luminance 0.176; OKLCH L 56.4% C 0.157 H 259.0°. Best body text is #FFFFFF at 4.64:1 contrast (WCAG AA passes).

Color values

HEX	#3773D0
RGB	rgb(55, 115, 208)
HSL	hsl(216, 62%, 52%)
HSV	hsv(216, 74%, 82%)
CMYK	cmyk(73.6%, 44.7%, 0%, 18.4%)
CIE-LAB	lab(49.04, 12.46, -53.69)
CIE-LCH	lch(49.04, 55.11, 283.07°)
OKLab	oklab(56.45% -0.0299 -0.1538)
OKLCH	oklch(56.45% 0.157 259)
XYZ	xyz(19.0873, 17.6256, 62.0584)
Luminance	0.1763 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3773D0 #D09437

analogous

#37BFD0 #3773D0 #4837D0

triadic

#3773D0 #D03773 #73D037

tetradic

#3773D0 #D037BF #D09437 #37D048

square

#3773D0 #D037BF #D09437 #37D048

split-complementary

#3773D0 #D04837 #BFD037

monochromatic

#1B3D72 #2657A3 #3773D0 #6996DC #9AB8E7

Accessibility & contrast

On white

4.64

#3773D0 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.53

#3773D0 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#FFFFFF on #3773D0

4.64:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3773D0	#FFFFFF	#000000	##FFFFFF
##3773D0	1.00	4.64	4.53	4.64
#FFFFFF	4.64	1.00	21.00	1.00
#000000	4.53	21.00	1.00	21.00
##FFFFFF	4.64	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#447CD4

Deuteranopia (green-blind)

#246ECE

Tritanopia (blue-blind)

#008997

Achromatopsia (no color)

#757575

Design tokens & code

CSS

--color: #3773d0;
/* rgb */ color: rgb(55, 115, 208);
/* oklch */ color: oklch(56.4% 0.157 259.0);

Tailwind

colors: {
  custom: {
    50: '#819adf',
    500: '#3773d0',
    950: '#000000',
  },
}

SCSS

$custom: #3773d0;
$custom-light: #819adf;
$custom-dark: #000000;

JSON

{
  "hex": "#3773d0",
  "rgb": {
    "r": 55,
    "g": 115,
    "b": 208
  },
  "hsl": {
    "h": 216.471,
    "s": 61.943,
    "l": 51.569
  },
  "oklch": {
    "l": 0.56446,
    "c": 0.15668,
    "h": 259
  },
  "luminance": 0.17628
}

Semantic roles & 50–950 ramp

primary

#3773D0

secondary

#D3B990

accent

#A543E5

background

#F8F9FD

surface

#F0F2FB

border

#CBCCD4

text

#0C0E15

muted

#7D7E83

Preview Lab

Preview with #3773D0

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

Preview Lab → · Contrast checker → · Palette generator →