#3741BC#3741BC

#3741BC is a dark, vivid blue. Relative luminance 0.082; OKLCH L 45.0% C 0.190 H 272.4°. Best body text is #FFFFFF at 7.94:1 contrast (WCAG AA passes).

Color values

HEX	#3741BC
RGB	rgb(55, 65, 188)
HSL	hsl(235, 55%, 48%)
HSV	hsv(235, 71%, 74%)
CMYK	cmyk(70.7%, 65.4%, 0%, 26.3%)
CIE-LAB	lab(34.44, 37.12, -65.77)
CIE-LCH	lch(34.44, 75.52, 299.44°)
OKLab	oklab(44.99% 0.008 -0.19)
OKLCH	oklch(44.99% 0.19 272.4)
XYZ	xyz(12.5399, 8.2224, 48.4934)
Luminance	0.0822 (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

#3741BC #BCB237

analogous

#3783BC #3741BC #7037BC

triadic

#3741BC #BC3741 #41BC37

tetradic

#3741BC #BC3783 #BCB237 #37BC70

square

#3741BC #BC3783 #BCB237 #37BC70

split-complementary

#3741BC #BC7037 #83BC37

monochromatic

#1B205D #29318D #3741BC #6068D0 #8F95DE

Accessibility & contrast

On white

7.94

#3741BC on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.64

#3741BC on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3741BC

7.94:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3741BC	#FFFFFF	#000000	##FFFFFF
##3741BC	1.00	7.94	2.64	7.94
#FFFFFF	7.94	1.00	21.00	1.00
#000000	2.64	21.00	1.00	21.00
##FFFFFF	7.94	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0057C0

Deuteranopia (green-blind)

#004BBA

Tritanopia (blue-blind)

#006179

Achromatopsia (no color)

#515151

Design tokens & code

CSS

--color: #3741bc;
/* rgb */ color: rgb(55, 65, 188);
/* oklch */ color: oklch(45.0% 0.190 272.4);

Tailwind

colors: {
  custom: {
    50: '#8076d1',
    500: '#3741bc',
    950: '#000000',
  },
}

SCSS

$custom: #3741bc;
$custom-light: #8076d1;
$custom-dark: #000000;

JSON

{
  "hex": "#3741bc",
  "rgb": {
    "r": 55,
    "g": 65,
    "b": 188
  },
  "hsl": {
    "h": 235.489,
    "s": 54.733,
    "l": 47.647
  },
  "oklch": {
    "l": 0.44989,
    "c": 0.19018,
    "h": 272.4
  },
  "luminance": 0.08224
}

Semantic roles & 50–950 ramp

primary

#3741BC

secondary

#C9C486

accent

#D34ADE

background

#F8F7FD

surface

#F0EDFA

border

#CBC8D3

text

#0C0814

muted

#7D7B83

Preview Lab

Preview with #3741BC

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

Preview Lab → · Contrast checker → · Palette generator →