#3743B7#3743B7

#3743B7 is a dark, vivid blue. Relative luminance 0.082; OKLCH L 44.9% C 0.181 H 272.2°. Best body text is #FFFFFF at 7.93:1 contrast (WCAG AA passes).

Color values

HEX	#3743B7
RGB	rgb(55, 67, 183)
HSL	hsl(234, 54%, 47%)
HSV	hsv(234, 70%, 72%)
CMYK	cmyk(69.9%, 63.4%, 0%, 28.2%)
CIE-LAB	lab(34.49, 34.10, -62.74)
CIE-LCH	lch(34.49, 71.41, 298.52°)
OKLab	oklab(44.89% 0.0069 -0.1811)
OKLCH	oklch(44.89% 0.181 272.2)
XYZ	xyz(12.1271, 8.2443, 45.7428)
Luminance	0.0824 (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

#3743B7 #B7AB37

analogous

#3783B7 #3743B7 #6B37B7

triadic

#3743B7 #B73743 #43B737

tetradic

#3743B7 #B73783 #B7AB37 #37B76B

square

#3743B7 #B73783 #B7AB37 #37B76B

split-complementary

#3743B7 #B76B37 #83B737

monochromatic

#1B2159 #293288 #3743B7 #5D68CE #8C94DC

Accessibility & contrast

On white

7.93

#3743B7 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.65

#3743B7 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3743B7

7.93:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3743B7	#FFFFFF	#000000	##FFFFFF
##3743B7	1.00	7.93	2.65	7.93
#FFFFFF	7.93	1.00	21.00	1.00
#000000	2.65	21.00	1.00	21.00
##FFFFFF	7.93	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0057BB

Deuteranopia (green-blind)

#004BB5

Tritanopia (blue-blind)

#006177

Achromatopsia (no color)

#515151

Design tokens & code

CSS

--color: #3743b7;
/* rgb */ color: rgb(55, 67, 183);
/* oklch */ color: oklch(44.9% 0.181 272.2);

Tailwind

colors: {
  custom: {
    50: '#7f77ce',
    500: '#3743b7',
    950: '#000000',
  },
}

SCSS

$custom: #3743b7;
$custom-light: #7f77ce;
$custom-dark: #000000;

JSON

{
  "hex": "#3743b7",
  "rgb": {
    "r": 55,
    "g": 67,
    "b": 183
  },
  "hsl": {
    "h": 234.375,
    "s": 53.782,
    "l": 46.667
  },
  "oklch": {
    "l": 0.44889,
    "c": 0.18127,
    "h": 272.2
  },
  "luminance": 0.08245
}

Semantic roles & 50–950 ramp

primary

#3743B7

secondary

#C7C083

accent

#CF4BDD

background

#F8F7FC

surface

#F0EDF9

border

#CBC8D2

text

#0B0814

muted

#7C7B82

Preview Lab

Preview with #3743B7

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

Preview Lab → · Contrast checker → · Palette generator →