#3741B7#3741B7

#3741B7 is a dark, vivid blue. Relative luminance 0.080; OKLCH L 44.5% C 0.184 H 272.6°. Best body text is #FFFFFF at 8.07:1 contrast (WCAG AA passes).

Color values

HEX	#3741B7
RGB	rgb(55, 65, 183)
HSL	hsl(235, 54%, 47%)
HSV	hsv(235, 70%, 72%)
CMYK	cmyk(69.9%, 64.5%, 0%, 28.2%)
CIE-LAB	lab(34.01, 35.37, -63.53)
CIE-LCH	lch(34.01, 72.71, 299.10°)
OKLab	oklab(44.54% 0.0084 -0.1835)
OKLCH	oklch(44.54% 0.184 272.6)
XYZ	xyz(12.0102, 8.0106, 45.7038)
Luminance	0.0801 (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

#3741B7 #B7AD37

analogous

#3781B7 #3741B7 #6D37B7

triadic

#3741B7 #B73741 #41B737

tetradic

#3741B7 #B73781 #B7AD37 #37B76D

square

#3741B7 #B73781 #B7AD37 #37B76D

split-complementary

#3741B7 #B76D37 #81B737

monochromatic

#1B2059 #293088 #3741B7 #5D66CE #8C92DC

Accessibility & contrast

On white

8.07

#3741B7 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.60

#3741B7 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3741B7

8.07:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3741B7	#FFFFFF	#000000	##FFFFFF
##3741B7	1.00	8.07	2.60	8.07
#FFFFFF	8.07	1.00	21.00	1.00
#000000	2.60	21.00	1.00	21.00
##FFFFFF	8.07	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0056BB

Deuteranopia (green-blind)

#004AB5

Tritanopia (blue-blind)

#006076

Achromatopsia (no color)

#505050

Design tokens & code

CSS

--color: #3741b7;
/* rgb */ color: rgb(55, 65, 183);
/* oklch */ color: oklch(44.5% 0.184 272.6);

Tailwind

colors: {
  custom: {
    50: '#7f76ce',
    500: '#3741b7',
    950: '#000000',
  },
}

SCSS

$custom: #3741b7;
$custom-light: #7f76ce;
$custom-dark: #000000;

JSON

{
  "hex": "#3741b7",
  "rgb": {
    "r": 55,
    "g": 65,
    "b": 183
  },
  "hsl": {
    "h": 235.313,
    "s": 53.782,
    "l": 46.667
  },
  "oklch": {
    "l": 0.44535,
    "c": 0.18365,
    "h": 272.6
  },
  "luminance": 0.08012
}

Semantic roles & 50–950 ramp

primary

#3741B7

secondary

#C7C283

accent

#D24BDD

background

#F8F7FC

surface

#F0EDF9

border

#CBC8D2

text

#0B0814

muted

#7C7B82

Preview Lab

Preview with #3741B7

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

Preview Lab → · Contrast checker → · Palette generator →