#3733AB#3733AB

#3733AB is a dark, vivid blue. Relative luminance 0.061; OKLCH L 41.1% C 0.184 H 276.0°. Best body text is #FFFFFF at 9.44:1 contrast (WCAG AA passes).

Color values

HEX	#3733AB
RGB	rgb(55, 51, 171)
HSL	hsl(242, 54%, 44%)
HSV	hsv(242, 70%, 67%)
CMYK	cmyk(67.8%, 70.2%, 0%, 32.9%)
CIE-LAB	lab(29.71, 39.85, -63.43)
CIE-LCH	lch(29.71, 74.91, 302.14°)
OKLab	oklab(41.09% 0.0194 -0.1832)
OKLCH	oklch(41.09% 0.184 276)
XYZ	xyz(10.1077, 6.1193, 39.1687)
Luminance	0.0612 (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

#3733AB #A7AB33

analogous

#336BAB #3733AB #7333AB

triadic

#3733AB #AB3733 #33AB37

tetradic

#3733AB #AB336B #A7AB33 #33AB73

square

#3733AB #AB336B #A7AB33 #33AB73

split-complementary

#3733AB #AB7333 #6BAB33

monochromatic

#19174D #28257C #3733AB #5450CB #827FD9

Accessibility & contrast

On white

9.44

#3733AB on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.22

#3733AB on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3733AB

9.44:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3733AB	#FFFFFF	#000000	##FFFFFF
##3733AB	1.00	9.44	2.22	9.44
#FFFFFF	9.44	1.00	21.00	1.00
#000000	2.22	21.00	1.00	21.00
##FFFFFF	9.44	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004BAF

Deuteranopia (green-blind)

#0041A9

Tritanopia (blue-blind)

#00546B

Achromatopsia (no color)

#464646

Design tokens & code

CSS

--color: #3733ab;
/* rgb */ color: rgb(55, 51, 171);
/* oklch */ color: oklch(41.1% 0.184 276.0);

Tailwind

colors: {
  custom: {
    50: '#7e6cc5',
    500: '#3733ab',
    950: '#000000',
  },
}

SCSS

$custom: #3733ab;
$custom-light: #7e6cc5;
$custom-dark: #000000;

JSON

{
  "hex": "#3733ab",
  "rgb": {
    "r": 55,
    "g": 51,
    "b": 171
  },
  "hsl": {
    "h": 242,
    "s": 54.054,
    "l": 43.529
  },
  "oklch": {
    "l": 0.41088,
    "c": 0.18422,
    "h": 276
  },
  "luminance": 0.0612
}

Semantic roles & 50–950 ramp

primary

#3733AB

secondary

#C0C278

accent

#DD4AD9

background

#F8F6FC

surface

#EFEBF8

border

#CAC6D1

text

#0B0713

muted

#7C7A82

Preview Lab

Preview with #3733AB

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

Preview Lab → · Contrast checker → · Palette generator →