#3741A5#3741A5

#3741A5 is a dark, vivid blue. Relative luminance 0.073; OKLCH L 43.0% C 0.159 H 273.3°. Best body text is #FFFFFF at 8.53:1 contrast (WCAG AA passes).

Color values

HEX	#3741A5
RGB	rgb(55, 65, 165)
HSL	hsl(235, 50%, 43%)
HSV	hsv(235, 67%, 65%)
CMYK	cmyk(66.7%, 60.6%, 0%, 35.3%)
CIE-LAB	lab(32.50, 28.98, -55.26)
CIE-LCH	lch(32.50, 62.40, 297.68°)
OKLab	oklab(42.96% 0.0091 -0.1592)
OKLCH	oklch(42.96% 0.159 273.3)
XYZ	xyz(10.2551, 7.3085, 36.4603)
Luminance	0.0731 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3741A5 #A59B37

analogous

#3778A5 #3741A5 #6437A5

triadic

#3741A5 #A53741 #41A537

tetradic

#3741A5 #A53778 #A59B37 #37A564

square

#3741A5 #A53778 #A59B37 #37A564

split-complementary

#3741A5 #A56437 #78A537

monochromatic

#181D49 #282F77 #3741A5 #535EC6 #8189D5

Accessibility & contrast

On white

8.53

#3741A5 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.46

#3741A5 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3741A5

8.53:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3741A5	#FFFFFF	#000000	##FFFFFF
##3741A5	1.00	8.53	2.46	8.53
#FFFFFF	8.53	1.00	21.00	1.00
#000000	2.46	21.00	1.00	21.00
##FFFFFF	8.53	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0051A8

Deuteranopia (green-blind)

#0048A3

Tritanopia (blue-blind)

#005A6C

Achromatopsia (no color)

#4C4C4C

Design tokens & code

CSS

--color: #3741a5;
/* rgb */ color: rgb(55, 65, 165);
/* oklch */ color: oklch(43.0% 0.159 273.3);

Tailwind

colors: {
  custom: {
    50: '#7b75c0',
    500: '#3741a5',
    950: '#000000',
  },
}

SCSS

$custom: #3741a5;
$custom-light: #7b75c0;
$custom-dark: #000000;

JSON

{
  "hex": "#3741a5",
  "rgb": {
    "r": 55,
    "g": 65,
    "b": 165
  },
  "hsl": {
    "h": 234.545,
    "s": 50,
    "l": 43.137
  },
  "oklch": {
    "l": 0.4296,
    "c": 0.15946,
    "h": 273.3
  },
  "luminance": 0.07309
}

Semantic roles & 50–950 ramp

primary

#3741A5

secondary

#BFB879

accent

#CD4EDA

background

#F8F7FB

surface

#EFEDF7

border

#CAC8D0

text

#0A0812

muted

#7C7B81

Preview Lab

Preview with #3741A5

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

Preview Lab → · Contrast checker → · Palette generator →