#3741B4#3741B4

#3741B4 is a dark, vivid blue. Relative luminance 0.079; OKLCH L 44.3% C 0.180 H 272.7°. Best body text is #FFFFFF at 8.15:1 contrast (WCAG AA passes).

Color values

HEX	#3741B4
RGB	rgb(55, 65, 180)
HSL	hsl(235, 53%, 46%)
HSV	hsv(235, 69%, 71%)
CMYK	cmyk(69.4%, 63.9%, 0%, 29.4%)
CIE-LAB	lab(33.75, 34.31, -62.18)
CIE-LCH	lch(33.75, 71.02, 298.89°)
OKLab	oklab(44.27% 0.0086 -0.1795)
OKLCH	oklch(44.27% 0.18 272.7)
XYZ	xyz(11.7013, 7.8870, 44.0768)
Luminance	0.0789 (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

#3741B4 #B4AA37

analogous

#377FB4 #3741B4 #6B37B4

triadic

#3741B4 #B43741 #41B437

tetradic

#3741B4 #B4377F #B4AA37 #37B46B

square

#3741B4 #B4377F #B4AA37 #37B46B

split-complementary

#3741B4 #B46B37 #7FB437

monochromatic

#1A1F56 #293085 #3741B4 #5B64CD #8A91DB

Accessibility & contrast

On white

8.15

#3741B4 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.58

#3741B4 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3741B4

8.15:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3741B4	#FFFFFF	#000000	##FFFFFF
##3741B4	1.00	8.15	2.58	8.15
#FFFFFF	8.15	1.00	21.00	1.00
#000000	2.58	21.00	1.00	21.00
##FFFFFF	8.15	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0055B8

Deuteranopia (green-blind)

#004AB2

Tritanopia (blue-blind)

#005F74

Achromatopsia (no color)

#4F4F4F

Design tokens & code

CSS

--color: #3741b4;
/* rgb */ color: rgb(55, 65, 180);
/* oklch */ color: oklch(44.3% 0.180 272.7);

Tailwind

colors: {
  custom: {
    50: '#7e75cb',
    500: '#3741b4',
    950: '#000000',
  },
}

SCSS

$custom: #3741b4;
$custom-light: #7e75cb;
$custom-dark: #000000;

JSON

{
  "hex": "#3741b4",
  "rgb": {
    "r": 55,
    "g": 65,
    "b": 180
  },
  "hsl": {
    "h": 235.2,
    "s": 53.191,
    "l": 46.078
  },
  "oklch": {
    "l": 0.44266,
    "c": 0.1797,
    "h": 272.7
  },
  "luminance": 0.07888
}

Semantic roles & 50–950 ramp

primary

#3741B4

secondary

#C6C081

accent

#D14BDD

background

#F8F7FC

surface

#EFEDF9

border

#CAC8D2

text

#0B0813

muted

#7C7B82

Preview Lab

Preview with #3741B4

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

Preview Lab → · Contrast checker → · Palette generator →