#3733A9#3733A9

#3733A9 is a dark, vivid blue. Relative luminance 0.060; OKLCH L 40.9% C 0.182 H 276.2°. Best body text is #FFFFFF at 9.51:1 contrast (WCAG AA passes).

Color values

HEX	#3733A9
RGB	rgb(55, 51, 169)
HSL	hsl(242, 54%, 43%)
HSV	hsv(242, 70%, 66%)
CMYK	cmyk(67.5%, 69.8%, 0%, 33.7%)
CIE-LAB	lab(29.52, 39.18, -62.54)
CIE-LCH	lch(29.52, 73.80, 302.07°)
OKLab	oklab(40.89% 0.0197 -0.1806)
OKLCH	oklch(40.89% 0.182 276.2)
XYZ	xyz(9.9185, 6.0436, 38.1723)
Luminance	0.0604 (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

#3733A9 #A5A933

analogous

#336AA9 #3733A9 #7233A9

triadic

#3733A9 #A93733 #33A937

tetradic

#3733A9 #A9336A #A5A933 #33A972

square

#3733A9 #A9336A #A5A933 #33A972

split-complementary

#3733A9 #A97233 #6AA933

monochromatic

#18174B #28257A #3733A9 #534FCA #817ED8

Accessibility & contrast

On white

9.51

#3733A9 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.21

#3733A9 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3733A9

9.51:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3733A9	#FFFFFF	#000000	##FFFFFF
##3733A9	1.00	9.51	2.21	9.51
#FFFFFF	9.51	1.00	21.00	1.00
#000000	2.21	21.00	1.00	21.00
##FFFFFF	9.51	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004BAD

Deuteranopia (green-blind)

#0040A7

Tritanopia (blue-blind)

#00536A

Achromatopsia (no color)

#464646

Design tokens & code

CSS

--color: #3733a9;
/* rgb */ color: rgb(55, 51, 169);
/* oklch */ color: oklch(40.9% 0.182 276.2);

Tailwind

colors: {
  custom: {
    50: '#7d6cc4',
    500: '#3733a9',
    950: '#000000',
  },
}

SCSS

$custom: #3733a9;
$custom-light: #7d6cc4;
$custom-dark: #000000;

JSON

{
  "hex": "#3733a9",
  "rgb": {
    "r": 55,
    "g": 51,
    "b": 169
  },
  "hsl": {
    "h": 242.034,
    "s": 53.636,
    "l": 43.137
  },
  "oklch": {
    "l": 0.40894,
    "c": 0.18166,
    "h": 276.2
  },
  "luminance": 0.06044
}

Semantic roles & 50–950 ramp

primary

#3733A9

secondary

#BFC177

accent

#DD4BD8

background

#F8F6FC

surface

#EFEBF8

border

#CAC6D1

text

#0B0713

muted

#7C7A82

Preview Lab

Preview with #3733A9

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

Preview Lab → · Contrast checker → · Palette generator →