#3733A8#3733A8

#3733A8 is a dark, vivid blue. Relative luminance 0.060; OKLCH L 40.8% C 0.180 H 276.3°. Best body text is #FFFFFF at 9.54:1 contrast (WCAG AA passes).

Color values

HEX	#3733A8
RGB	rgb(55, 51, 168)
HSL	hsl(242, 53%, 43%)
HSV	hsv(242, 70%, 66%)
CMYK	cmyk(67.3%, 69.6%, 0%, 34.1%)
CIE-LAB	lab(29.43, 38.85, -62.09)
CIE-LCH	lch(29.43, 73.24, 302.03°)
OKLab	oklab(40.8% 0.0199 -0.1793)
OKLCH	oklch(40.8% 0.18 276.3)
XYZ	xyz(9.8249, 6.0062, 37.6797)
Luminance	0.0601 (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

#3733A8 #A4A833

analogous

#336AA8 #3733A8 #7133A8

triadic

#3733A8 #A83733 #33A837

tetradic

#3733A8 #A8336A #A4A833 #33A871

square

#3733A8 #A8336A #A4A833 #33A871

split-complementary

#3733A8 #A87133 #6AA833

monochromatic

#18164A #282579 #3733A8 #534FC9 #817ED8

Accessibility & contrast

On white

9.54

#3733A8 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.20

#3733A8 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3733A8

9.54:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3733A8	#FFFFFF	#000000	##FFFFFF
##3733A8	1.00	9.54	2.20	9.54
#FFFFFF	9.54	1.00	21.00	1.00
#000000	2.20	21.00	1.00	21.00
##FFFFFF	9.54	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004AAC

Deuteranopia (green-blind)

#0040A6

Tritanopia (blue-blind)

#005369

Achromatopsia (no color)

#454545

Design tokens & code

CSS

--color: #3733a8;
/* rgb */ color: rgb(55, 51, 168);
/* oklch */ color: oklch(40.8% 0.180 276.3);

Tailwind

colors: {
  custom: {
    50: '#7d6cc3',
    500: '#3733a8',
    950: '#000000',
  },
}

SCSS

$custom: #3733a8;
$custom-light: #7d6cc3;
$custom-dark: #000000;

JSON

{
  "hex": "#3733a8",
  "rgb": {
    "r": 55,
    "g": 51,
    "b": 168
  },
  "hsl": {
    "h": 242.051,
    "s": 53.425,
    "l": 42.941
  },
  "oklch": {
    "l": 0.40798,
    "c": 0.18038,
    "h": 276.3
  },
  "luminance": 0.06007
}

Semantic roles & 50–950 ramp

primary

#3733A8

secondary

#BEC176

accent

#DD4BD8

background

#F8F6FC

surface

#EFEBF8

border

#CAC6D1

text

#0B0713

muted

#7C7A82

Preview Lab

Preview with #3733A8

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

Preview Lab → · Contrast checker → · Palette generator →