#3742BA#3742BA

#3742BA is a dark, vivid blue. Relative luminance 0.083; OKLCH L 45.0% C 0.186 H 272.3°. Best body text is #FFFFFF at 7.92:1 contrast (WCAG AA passes).

Color values

HEX	#3742BA
RGB	rgb(55, 66, 186)
HSL	hsl(235, 54%, 47%)
HSV	hsv(235, 70%, 73%)
CMYK	cmyk(70.4%, 64.5%, 0%, 27.1%)
CIE-LAB	lab(34.50, 35.79, -64.49)
CIE-LCH	lch(34.50, 73.75, 299.03°)
OKLab	oklab(44.98% 0.0075 -0.1862)
OKLCH	oklch(44.98% 0.186 272.3)
XYZ	xyz(12.3837, 8.2526, 47.3851)
Luminance	0.0825 (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

#3742BA #BAAF37

analogous

#3783BA #3742BA #6E37BA

triadic

#3742BA #BA3742 #42BA37

tetradic

#3742BA #BA3783 #BAAF37 #37BA6E

square

#3742BA #BA3783 #BAAF37 #37BA6E

split-complementary

#3742BA #BA6E37 #83BA37

monochromatic

#1B205C #29318B #3742BA #5F68D0 #8E95DE

Accessibility & contrast

On white

7.92

#3742BA on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.65

#3742BA on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3742BA

7.92:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3742BA	#FFFFFF	#000000	##FFFFFF
##3742BA	1.00	7.92	2.65	7.92
#FFFFFF	7.92	1.00	21.00	1.00
#000000	2.65	21.00	1.00	21.00
##FFFFFF	7.92	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0057BE

Deuteranopia (green-blind)

#004BB8

Tritanopia (blue-blind)

#006178

Achromatopsia (no color)

#515151

Design tokens & code

CSS

--color: #3742ba;
/* rgb */ color: rgb(55, 66, 186);
/* oklch */ color: oklch(45.0% 0.186 272.3);

Tailwind

colors: {
  custom: {
    50: '#8076d0',
    500: '#3742ba',
    950: '#000000',
  },
}

SCSS

$custom: #3742ba;
$custom-light: #8076d0;
$custom-dark: #000000;

JSON

{
  "hex": "#3742ba",
  "rgb": {
    "r": 55,
    "g": 66,
    "b": 186
  },
  "hsl": {
    "h": 234.962,
    "s": 54.357,
    "l": 47.255
  },
  "oklch": {
    "l": 0.44981,
    "c": 0.1864,
    "h": 272.3
  },
  "luminance": 0.08254
}

Semantic roles & 50–950 ramp

primary

#3742BA

secondary

#C8C285

accent

#D14ADE

background

#F8F7FC

surface

#F0EDF9

border

#CBC8D2

text

#0C0814

muted

#7D7B82

Preview Lab

Preview with #3742BA

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

Preview Lab → · Contrast checker → · Palette generator →