#3741B8#3741B8

#3741B8 is a dark, vivid blue. Relative luminance 0.081; OKLCH L 44.6% C 0.185 H 272.6°. Best body text is #FFFFFF at 8.04:1 contrast (WCAG AA passes).

Color values

HEX	#3741B8
RGB	rgb(55, 65, 184)
HSL	hsl(235, 54%, 47%)
HSV	hsv(235, 70%, 72%)
CMYK	cmyk(70.1%, 64.7%, 0%, 27.8%)
CIE-LAB	lab(34.09, 35.72, -63.98)
CIE-LCH	lch(34.09, 73.28, 299.17°)
OKLab	oklab(44.63% 0.0083 -0.1848)
OKLCH	oklch(44.63% 0.185 272.6)
XYZ	xyz(12.1147, 8.0523, 46.2539)
Luminance	0.0805 (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

#3741B8 #B8AE37

analogous

#3782B8 #3741B8 #6E37B8

triadic

#3741B8 #B83741 #41B837

tetradic

#3741B8 #B83782 #B8AE37 #37B86E

square

#3741B8 #B83782 #B8AE37 #37B86E

split-complementary

#3741B8 #B86E37 #82B837

monochromatic

#1B205A #293089 #3741B8 #5D66CF #8D93DD

Accessibility & contrast

On white

8.04

#3741B8 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.61

#3741B8 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3741B8

8.04:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3741B8	#FFFFFF	#000000	##FFFFFF
##3741B8	1.00	8.04	2.61	8.04
#FFFFFF	8.04	1.00	21.00	1.00
#000000	2.61	21.00	1.00	21.00
##FFFFFF	8.04	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0056BC

Deuteranopia (green-blind)

#004AB6

Tritanopia (blue-blind)

#006076

Achromatopsia (no color)

#505050

Design tokens & code

CSS

--color: #3741b8;
/* rgb */ color: rgb(55, 65, 184);
/* oklch */ color: oklch(44.6% 0.185 272.6);

Tailwind

colors: {
  custom: {
    50: '#7f76ce',
    500: '#3741b8',
    950: '#000000',
  },
}

SCSS

$custom: #3741b8;
$custom-light: #7f76ce;
$custom-dark: #000000;

JSON

{
  "hex": "#3741b8",
  "rgb": {
    "r": 55,
    "g": 65,
    "b": 184
  },
  "hsl": {
    "h": 235.349,
    "s": 53.975,
    "l": 46.863
  },
  "oklch": {
    "l": 0.44626,
    "c": 0.18497,
    "h": 272.6
  },
  "luminance": 0.08054
}

Semantic roles & 50–950 ramp

primary

#3741B8

secondary

#C7C284

accent

#D24ADD

background

#F8F7FC

surface

#F0EDF9

border

#CBC8D2

text

#0B0814

muted

#7C7B82

Preview Lab

Preview with #3741B8

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

Preview Lab → · Contrast checker → · Palette generator →