#3773D3#3773D3

#3773D3 is a mid, vivid blue. Relative luminance 0.178; OKLCH L 56.6% C 0.161 H 259.5°. Best body text is #FFFFFF at 4.61:1 contrast (WCAG AA passes).

Color values

HEX	#3773D3
RGB	rgb(55, 115, 211)
HSL	hsl(217, 64%, 52%)
HSV	hsv(217, 74%, 83%)
CMYK	cmyk(73.9%, 45.5%, 0%, 17.3%)
CIE-LAB	lab(49.22, 13.57, -55.10)
CIE-LCH	lch(49.22, 56.75, 283.83°)
OKLab	oklab(56.65% -0.0293 -0.158)
OKLCH	oklch(56.65% 0.161 259.5)
XYZ	xyz(19.4599, 17.7747, 64.0206)
Luminance	0.1778 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3773D3 #D39737

analogous

#37C1D3 #3773D3 #4937D3

triadic

#3773D3 #D33773 #73D337

tetradic

#3773D3 #D337C1 #D39737 #37D349

square

#3773D3 #D337C1 #D39737 #37D349

split-complementary

#3773D3 #D34937 #C1D337

monochromatic

#1A3D76 #2557A8 #3773D3 #6996DE #9BB9E9

Accessibility & contrast

On white

4.61

#3773D3 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.56

#3773D3 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#FFFFFF on #3773D3

4.61:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3773D3	#FFFFFF	#000000	##FFFFFF
##3773D3	1.00	4.61	4.56	4.61
#FFFFFF	4.61	1.00	21.00	1.00
#000000	4.56	21.00	1.00	21.00
##FFFFFF	4.61	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#417DD7

Deuteranopia (green-blind)

#1E6ED1

Tritanopia (blue-blind)

#008A99

Achromatopsia (no color)

#757575

Design tokens & code

CSS

--color: #3773d3;
/* rgb */ color: rgb(55, 115, 211);
/* oklch */ color: oklch(56.6% 0.161 259.5);

Tailwind

colors: {
  custom: {
    50: '#829ae1',
    500: '#3773d3',
    950: '#000000',
  },
}

SCSS

$custom: #3773d3;
$custom-light: #829ae1;
$custom-dark: #000000;

JSON

{
  "hex": "#3773d3",
  "rgb": {
    "r": 55,
    "g": 115,
    "b": 211
  },
  "hsl": {
    "h": 216.923,
    "s": 63.934,
    "l": 52.157
  },
  "oklch": {
    "l": 0.56646,
    "c": 0.16066,
    "h": 259.5
  },
  "luminance": 0.17777
}

Semantic roles & 50–950 ramp

primary

#3773D3

secondary

#D5BB91

accent

#A741E7

background

#F8F9FD

surface

#F0F2FB

border

#CBCCD4

text

#0C0E15

muted

#7D7E83

Preview Lab

Preview with #3773D3

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

Preview Lab → · Contrast checker → · Palette generator →