#3733AA#3733AA

#3733AA is a dark, vivid blue. Relative luminance 0.061; OKLCH L 41.0% C 0.183 H 276.1°. Best body text is #FFFFFF at 9.47:1 contrast (WCAG AA passes).

Color values

HEX	#3733AA
RGB	rgb(55, 51, 170)
HSL	hsl(242, 54%, 43%)
HSV	hsv(242, 70%, 67%)
CMYK	cmyk(67.6%, 70%, 0%, 33.3%)
CIE-LAB	lab(29.62, 39.52, -62.98)
CIE-LCH	lch(29.62, 74.35, 302.11°)
OKLab	oklab(40.99% 0.0196 -0.1819)
OKLCH	oklch(40.99% 0.183 276.1)
XYZ	xyz(10.0127, 6.0813, 38.6686)
Luminance	0.0608 (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

#3733AA #A6AA33

analogous

#336AAA #3733AA #7233AA

triadic

#3733AA #AA3733 #33AA37

tetradic

#3733AA #AA336A #A6AA33 #33AA72

square

#3733AA #AA336A #A6AA33 #33AA72

split-complementary

#3733AA #AA7233 #6AAA33

monochromatic

#19174C #28257B #3733AA #5450CA #827FD9

Accessibility & contrast

On white

9.47

#3733AA on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.22

#3733AA on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3733AA

9.47:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3733AA	#FFFFFF	#000000	##FFFFFF
##3733AA	1.00	9.47	2.22	9.47
#FFFFFF	9.47	1.00	21.00	1.00
#000000	2.22	21.00	1.00	21.00
##FFFFFF	9.47	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004BAE

Deuteranopia (green-blind)

#0040A8

Tritanopia (blue-blind)

#00536A

Achromatopsia (no color)

#464646

Design tokens & code

CSS

--color: #3733aa;
/* rgb */ color: rgb(55, 51, 170);
/* oklch */ color: oklch(41.0% 0.183 276.1);

Tailwind

colors: {
  custom: {
    50: '#7d6cc4',
    500: '#3733aa',
    950: '#000000',
  },
}

SCSS

$custom: #3733aa;
$custom-light: #7d6cc4;
$custom-dark: #000000;

JSON

{
  "hex": "#3733aa",
  "rgb": {
    "r": 55,
    "g": 51,
    "b": 170
  },
  "hsl": {
    "h": 242.017,
    "s": 53.846,
    "l": 43.333
  },
  "oklch": {
    "l": 0.40991,
    "c": 0.18295,
    "h": 276.1
  },
  "luminance": 0.06082
}

Semantic roles & 50–950 ramp

primary

#3733AA

secondary

#BFC277

accent

#DD4BD8

background

#F8F6FC

surface

#EFEBF8

border

#CAC6D1

text

#0B0713

muted

#7C7A82

Preview Lab

Preview with #3733AA

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

Preview Lab → · Contrast checker → · Palette generator →