#3743AF#3743AF

#3743AF is a dark, vivid blue. Relative luminance 0.079; OKLCH L 44.2% C 0.171 H 272.4°. Best body text is #FFFFFF at 8.13:1 contrast (WCAG AA passes).

Color values

HEX	#3743AF
RGB	rgb(55, 67, 175)
HSL	hsl(234, 52%, 45%)
HSV	hsv(234, 69%, 69%)
CMYK	cmyk(68.6%, 61.7%, 0%, 31.4%)
CIE-LAB	lab(33.82, 31.26, -59.10)
CIE-LCH	lch(33.82, 66.85, 297.88°)
OKLab	oklab(44.19% 0.0073 -0.1704)
OKLCH	oklch(44.19% 0.171 272.4)
XYZ	xyz(11.3180, 7.9206, 41.4815)
Luminance	0.0792 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Blue With A Hint Of Purple

#533CC6

ΔE00 5.94

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3743AF #AFA337

analogous

#377FAF #3743AF #6737AF

triadic

#3743AF #AF3743 #43AF37

tetradic

#3743AF #AF377F #AFA337 #37AF67

square

#3743AF #AF377F #AFA337 #37AF67

split-complementary

#3743AF #AF6737 #7FAF37

monochromatic

#1A1F52 #283180 #3743AF #5964CB #878FD9

Accessibility & contrast

On white

8.13

#3743AF on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.58

#3743AF on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3743AF

8.13:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3743AF	#FFFFFF	#000000	##FFFFFF
##3743AF	1.00	8.13	2.58	8.13
#FFFFFF	8.13	1.00	21.00	1.00
#000000	2.58	21.00	1.00	21.00
##FFFFFF	8.13	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0055B3

Deuteranopia (green-blind)

#004AAD

Tritanopia (blue-blind)

#005E72

Achromatopsia (no color)

#505050

Design tokens & code

CSS

--color: #3743af;
/* rgb */ color: rgb(55, 67, 175);
/* oklch */ color: oklch(44.2% 0.171 272.4);

Tailwind

colors: {
  custom: {
    50: '#7d77c8',
    500: '#3743af',
    950: '#000000',
  },
}

SCSS

$custom: #3743af;
$custom-light: #7d77c8;
$custom-dark: #000000;

JSON

{
  "hex": "#3743af",
  "rgb": {
    "r": 55,
    "g": 67,
    "b": 175
  },
  "hsl": {
    "h": 234,
    "s": 52.174,
    "l": 45.098
  },
  "oklch": {
    "l": 0.44188,
    "c": 0.17058,
    "h": 272.4
  },
  "luminance": 0.07922
}

Semantic roles & 50–950 ramp

primary

#3743AF

secondary

#C3BC7F

accent

#CD4CDC

background

#F8F7FC

surface

#EFEDF8

border

#CAC8D1

text

#0B0813

muted

#7C7B82

Preview Lab

Preview with #3743AF

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

Preview Lab → · Contrast checker → · Palette generator →