#3733B3#3733B3

#3733B3 is a dark, vivid blue. Relative luminance 0.064; OKLCH L 41.9% C 0.194 H 275.4°. Best body text is #FFFFFF at 9.18:1 contrast (WCAG AA passes).

Color values

HEX	#3733B3
RGB	rgb(55, 51, 179)
HSL	hsl(242, 56%, 45%)
HSV	hsv(242, 72%, 70%)
CMYK	cmyk(69.3%, 71.5%, 0%, 29.8%)
CIE-LAB	lab(30.48, 42.52, -66.94)
CIE-LCH	lch(30.48, 79.31, 302.42°)
OKLab	oklab(41.87% 0.0181 -0.1935)
OKLCH	oklch(41.87% 0.194 275.4)
XYZ	xyz(10.8934, 6.4335, 43.3068)
Luminance	0.0644 (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

#3733B3 #AFB333

analogous

#336FB3 #3733B3 #7733B3

triadic

#3733B3 #B33733 #33B337

tetradic

#3733B3 #B3336F #AFB333 #33B377

square

#3733B3 #B3336F #AFB333 #33B377

split-complementary

#3733B3 #B37733 #6FB333

monochromatic

#1A1854 #282583 #3733B3 #5955CE #8784DC

Accessibility & contrast

On white

9.18

#3733B3 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.29

#3733B3 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3733B3

9.18:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3733B3	#FFFFFF	#000000	##FFFFFF
##3733B3	1.00	9.18	2.29	9.18
#FFFFFF	9.18	1.00	21.00	1.00
#000000	2.29	21.00	1.00	21.00
##FFFFFF	9.18	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004DB7

Deuteranopia (green-blind)

#0042B1

Tritanopia (blue-blind)

#00576F

Achromatopsia (no color)

#484848

Design tokens & code

CSS

--color: #3733b3;
/* rgb */ color: rgb(55, 51, 179);
/* oklch */ color: oklch(41.9% 0.194 275.4);

Tailwind

colors: {
  custom: {
    50: '#7f6ccb',
    500: '#3733b3',
    950: '#000000',
  },
}

SCSS

$custom: #3733b3;
$custom-light: #7f6ccb;
$custom-dark: #000000;

JSON

{
  "hex": "#3733b3",
  "rgb": {
    "r": 55,
    "g": 51,
    "b": 179
  },
  "hsl": {
    "h": 241.875,
    "s": 55.652,
    "l": 45.098
  },
  "oklch": {
    "l": 0.41872,
    "c": 0.19432,
    "h": 275.4
  },
  "luminance": 0.06435
}

Semantic roles & 50–950 ramp

primary

#3733B3

secondary

#C3C67C

accent

#DF49DA

background

#F8F6FC

surface

#F0EBF9

border

#CBC6D2

text

#0C0713

muted

#7D7A82

Preview Lab

Preview with #3733B3

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

Preview Lab → · Contrast checker → · Palette generator →