#3741BD#3741BD

#3741BD is a mid, vivid blue. Relative luminance 0.083; OKLCH L 45.1% C 0.191 H 272.4°. Best body text is #FFFFFF at 7.91:1 contrast (WCAG AA passes).

Color values

HEX	#3741BD
RGB	rgb(55, 65, 189)
HSL	hsl(236, 55%, 48%)
HSV	hsv(236, 71%, 74%)
CMYK	cmyk(70.9%, 65.6%, 0%, 25.9%)
CIE-LAB	lab(34.53, 37.47, -66.21)
CIE-LCH	lch(34.53, 76.08, 299.50°)
OKLab	oklab(45.08% 0.008 -0.1913)
OKLCH	oklch(45.08% 0.191 272.4)
XYZ	xyz(12.6481, 8.2657, 49.0631)
Luminance	0.0827 (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

#3741BD #BDB337

analogous

#3784BD #3741BD #7037BD

triadic

#3741BD #BD3741 #41BD37

tetradic

#3741BD #BD3784 #BDB337 #37BD70

square

#3741BD #BD3784 #BDB337 #37BD70

split-complementary

#3741BD #BD7037 #84BD37

monochromatic

#1B205E #29318E #3741BD #6069D1 #9096DF

Accessibility & contrast

On white

7.91

#3741BD on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.65

#3741BD on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3741BD

7.91:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3741BD	#FFFFFF	#000000	##FFFFFF
##3741BD	1.00	7.91	2.65	7.91
#FFFFFF	7.91	1.00	21.00	1.00
#000000	2.65	21.00	1.00	21.00
##FFFFFF	7.91	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0057C1

Deuteranopia (green-blind)

#004BBB

Tritanopia (blue-blind)

#006279

Achromatopsia (no color)

#515151

Design tokens & code

CSS

--color: #3741bd;
/* rgb */ color: rgb(55, 65, 189);
/* oklch */ color: oklch(45.1% 0.191 272.4);

Tailwind

colors: {
  custom: {
    50: '#8076d2',
    500: '#3741bd',
    950: '#000000',
  },
}

SCSS

$custom: #3741bd;
$custom-light: #8076d2;
$custom-dark: #000000;

JSON

{
  "hex": "#3741bd",
  "rgb": {
    "r": 55,
    "g": 65,
    "b": 189
  },
  "hsl": {
    "h": 235.522,
    "s": 54.918,
    "l": 47.843
  },
  "oklch": {
    "l": 0.45081,
    "c": 0.19147,
    "h": 272.4
  },
  "luminance": 0.08267
}

Semantic roles & 50–950 ramp

primary

#3741BD

secondary

#C9C486

accent

#D34ADE

background

#F8F7FD

surface

#F0EDFA

border

#CBC8D3

text

#0C0814

muted

#7D7B83

Preview Lab

Preview with #3741BD

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

Preview Lab → · Contrast checker → · Palette generator →