#3733B1#3733B1

#3733B1 is a dark, vivid blue. Relative luminance 0.064; OKLCH L 41.7% C 0.192 H 275.5°. Best body text is #FFFFFF at 9.25:1 contrast (WCAG AA passes).

Color values

HEX	#3733B1
RGB	rgb(55, 51, 177)
HSL	hsl(242, 55%, 45%)
HSV	hsv(242, 71%, 69%)
CMYK	cmyk(68.9%, 71.2%, 0%, 30.6%)
CIE-LAB	lab(30.29, 41.86, -66.07)
CIE-LCH	lch(30.29, 78.22, 302.36°)
OKLab	oklab(41.68% 0.0185 -0.1909)
OKLCH	oklch(41.68% 0.192 275.5)
XYZ	xyz(10.6926, 6.3532, 42.2492)
Luminance	0.0635 (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

#3733B1 #ADB133

analogous

#336EB1 #3733B1 #7633B1

triadic

#3733B1 #B13733 #33B137

tetradic

#3733B1 #B1336E #ADB133 #33B176

square

#3733B1 #B1336E #ADB133 #33B176

split-complementary

#3733B1 #B17633 #6EB133

monochromatic

#191852 #282581 #3733B1 #5754CE #8683DB

Accessibility & contrast

On white

9.25

#3733B1 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.27

#3733B1 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3733B1

9.25:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3733B1	#FFFFFF	#000000	##FFFFFF
##3733B1	1.00	9.25	2.27	9.25
#FFFFFF	9.25	1.00	21.00	1.00
#000000	2.27	21.00	1.00	21.00
##FFFFFF	9.25	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004DB5

Deuteranopia (green-blind)

#0042AF

Tritanopia (blue-blind)

#00566E

Achromatopsia (no color)

#474747

Design tokens & code

CSS

--color: #3733b1;
/* rgb */ color: rgb(55, 51, 177);
/* oklch */ color: oklch(41.7% 0.192 275.5);

Tailwind

colors: {
  custom: {
    50: '#7f6cc9',
    500: '#3733b1',
    950: '#000000',
  },
}

SCSS

$custom: #3733b1;
$custom-light: #7f6cc9;
$custom-dark: #000000;

JSON

{
  "hex": "#3733b1",
  "rgb": {
    "r": 55,
    "g": 51,
    "b": 177
  },
  "hsl": {
    "h": 241.905,
    "s": 55.263,
    "l": 44.706
  },
  "oklch": {
    "l": 0.41675,
    "c": 0.19181,
    "h": 275.5
  },
  "luminance": 0.06354
}

Semantic roles & 50–950 ramp

primary

#3733B1

secondary

#C2C57B

accent

#DF49DA

background

#F8F6FC

surface

#F0EBF8

border

#CBC6D1

text

#0B0713

muted

#7C7A82

Preview Lab

Preview with #3733B1

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

Preview Lab → · Contrast checker → · Palette generator →