#3742B7#3742B7

#3742B7 is a dark, vivid blue. Relative luminance 0.081; OKLCH L 44.7% C 0.182 H 272.4°. Best body text is #FFFFFF at 8.00:1 contrast (WCAG AA passes).

Color values

HEX	#3742B7
RGB	rgb(55, 66, 183)
HSL	hsl(235, 54%, 47%)
HSV	hsv(235, 70%, 72%)
CMYK	cmyk(69.9%, 63.9%, 0%, 28.2%)
CIE-LAB	lab(34.24, 34.73, -63.14)
CIE-LCH	lch(34.24, 72.06, 298.82°)
OKLab	oklab(44.71% 0.0077 -0.1823)
OKLCH	oklch(44.71% 0.182 272.4)
XYZ	xyz(12.0681, 8.1264, 45.7231)
Luminance	0.0813 (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

#3742B7 #B7AC37

analogous

#3782B7 #3742B7 #6C37B7

triadic

#3742B7 #B73742 #42B737

tetradic

#3742B7 #B73782 #B7AC37 #37B76C

square

#3742B7 #B73782 #B7AC37 #37B76C

split-complementary

#3742B7 #B76C37 #82B737

monochromatic

#1B2059 #293188 #3742B7 #5D67CE #8C93DC

Accessibility & contrast

On white

8.00

#3742B7 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.63

#3742B7 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3742B7

8.00:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3742B7	#FFFFFF	#000000	##FFFFFF
##3742B7	1.00	8.00	2.63	8.00
#FFFFFF	8.00	1.00	21.00	1.00
#000000	2.63	21.00	1.00	21.00
##FFFFFF	8.00	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0057BB

Deuteranopia (green-blind)

#004BB5

Tritanopia (blue-blind)

#006076

Achromatopsia (no color)

#515151

Design tokens & code

CSS

--color: #3742b7;
/* rgb */ color: rgb(55, 66, 183);
/* oklch */ color: oklch(44.7% 0.182 272.4);

Tailwind

colors: {
  custom: {
    50: '#7f76ce',
    500: '#3742b7',
    950: '#000000',
  },
}

SCSS

$custom: #3742b7;
$custom-light: #7f76ce;
$custom-dark: #000000;

JSON

{
  "hex": "#3742b7",
  "rgb": {
    "r": 55,
    "g": 66,
    "b": 183
  },
  "hsl": {
    "h": 234.844,
    "s": 53.782,
    "l": 46.667
  },
  "oklch": {
    "l": 0.44711,
    "c": 0.18247,
    "h": 272.4
  },
  "luminance": 0.08128
}

Semantic roles & 50–950 ramp

primary

#3742B7

secondary

#C7C183

accent

#D14BDD

background

#F8F7FC

surface

#F0EDF9

border

#CBC8D2

text

#0B0814

muted

#7C7B82

Preview Lab

Preview with #3742B7

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

Preview Lab → · Contrast checker → · Palette generator →