#3741A6#3741A6

#3741A6 is a dark, vivid blue. Relative luminance 0.073; OKLCH L 43.0% C 0.161 H 273.3°. Best body text is #FFFFFF at 8.50:1 contrast (WCAG AA passes).

Color values

HEX	#3741A6
RGB	rgb(55, 65, 166)
HSL	hsl(235, 50%, 43%)
HSV	hsv(235, 67%, 65%)
CMYK	cmyk(66.9%, 60.8%, 0%, 34.9%)
CIE-LAB	lab(32.58, 29.34, -55.73)
CIE-LCH	lch(32.58, 62.98, 297.77°)
OKLab	oklab(43.05% 0.0091 -0.1606)
OKLCH	oklch(43.05% 0.161 273.3)
XYZ	xyz(10.3465, 7.3451, 36.9415)
Luminance	0.0735 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3741A6 #A69C37

analogous

#3778A6 #3741A6 #6537A6

triadic

#3741A6 #A63741 #41A637

tetradic

#3741A6 #A63778 #A69C37 #37A665

square

#3741A6 #A63778 #A69C37 #37A665

split-complementary

#3741A6 #A66537 #78A637

monochromatic

#191D4A #282F78 #3741A6 #545EC6 #8289D6

Accessibility & contrast

On white

8.50

#3741A6 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.47

#3741A6 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3741A6

8.50:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3741A6	#FFFFFF	#000000	##FFFFFF
##3741A6	1.00	8.50	2.47	8.50
#FFFFFF	8.50	1.00	21.00	1.00
#000000	2.47	21.00	1.00	21.00
##FFFFFF	8.50	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0052A9

Deuteranopia (green-blind)

#0048A4

Tritanopia (blue-blind)

#005A6D

Achromatopsia (no color)

#4D4D4D

Design tokens & code

CSS

--color: #3741a6;
/* rgb */ color: rgb(55, 65, 166);
/* oklch */ color: oklch(43.0% 0.161 273.3);

Tailwind

colors: {
  custom: {
    50: '#7b75c1',
    500: '#3741a6',
    950: '#000000',
  },
}

SCSS

$custom: #3741a6;
$custom-light: #7b75c1;
$custom-dark: #000000;

JSON

{
  "hex": "#3741a6",
  "rgb": {
    "r": 55,
    "g": 65,
    "b": 166
  },
  "hsl": {
    "h": 234.595,
    "s": 50.226,
    "l": 43.333
  },
  "oklch": {
    "l": 0.43045,
    "c": 0.16084,
    "h": 273.3
  },
  "luminance": 0.07346
}

Semantic roles & 50–950 ramp

primary

#3741A6

secondary

#BFB97A

accent

#CD4EDA

background

#F8F7FC

surface

#EFEDF8

border

#CAC8D1

text

#0B0812

muted

#7C7B81

Preview Lab

Preview with #3741A6

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

Preview Lab → · Contrast checker → · Palette generator →