#3733B4#3733B4

#3733B4 is a dark, vivid blue. Relative luminance 0.065; OKLCH L 42.0% C 0.196 H 275.3°. Best body text is #FFFFFF at 9.15:1 contrast (WCAG AA passes).

Color values

HEX	#3733B4
RGB	rgb(55, 51, 180)
HSL	hsl(242, 56%, 45%)
HSV	hsv(242, 72%, 71%)
CMYK	cmyk(69.4%, 71.7%, 0%, 29.4%)
CIE-LAB	lab(30.58, 42.86, -67.38)
CIE-LCH	lch(30.58, 79.85, 302.46°)
OKLab	oklab(41.97% 0.018 -0.1947)
OKLCH	oklch(41.97% 0.196 275.3)
XYZ	xyz(10.9949, 6.4741, 43.8414)
Luminance	0.0648 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Blue With A Hint Of Purple

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3733B4 #B0B433

analogous

#3370B4 #3733B4 #7733B4

triadic

#3733B4 #B43733 #33B437

tetradic

#3733B4 #B43370 #B0B433 #33B477

square

#3733B4 #B43370 #B0B433 #33B477

split-complementary

#3733B4 #B47733 #70B433

monochromatic

#1A1855 #282584 #3733B4 #5955CF #8885DC

Accessibility & contrast

On white

9.15

#3733B4 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.30

#3733B4 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3733B4

9.15:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3733B4	#FFFFFF	#000000	##FFFFFF
##3733B4	1.00	9.15	2.30	9.15
#FFFFFF	9.15	1.00	21.00	1.00
#000000	2.30	21.00	1.00	21.00
##FFFFFF	9.15	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004EB8

Deuteranopia (green-blind)

#0042B2

Tritanopia (blue-blind)

#005770

Achromatopsia (no color)

#484848

Design tokens & code

CSS

--color: #3733b4;
/* rgb */ color: rgb(55, 51, 180);
/* oklch */ color: oklch(42.0% 0.196 275.3);

Tailwind

colors: {
  custom: {
    50: '#7f6ccc',
    500: '#3733b4',
    950: '#000000',
  },
}

SCSS

$custom: #3733b4;
$custom-light: #7f6ccc;
$custom-dark: #000000;

JSON

{
  "hex": "#3733b4",
  "rgb": {
    "r": 55,
    "g": 51,
    "b": 180
  },
  "hsl": {
    "h": 241.86,
    "s": 55.844,
    "l": 45.294
  },
  "oklch": {
    "l": 0.41972,
    "c": 0.19556,
    "h": 275.3
  },
  "luminance": 0.06475
}

Semantic roles & 50–950 ramp

primary

#3733B4

secondary

#C4C67D

accent

#DF49DA

background

#F8F6FC

surface

#F0EBF9

border

#CBC6D2

text

#0C0713

muted

#7D7A82

Preview Lab

Preview with #3733B4

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

Preview Lab → · Contrast checker → · Palette generator →