#3741B2#3741B2

#3741B2 is a dark, vivid blue. Relative luminance 0.078; OKLCH L 44.1% C 0.177 H 272.8°. Best body text is #FFFFFF at 8.20:1 contrast (WCAG AA passes).

Color values

HEX	#3741B2
RGB	rgb(55, 65, 178)
HSL	hsl(235, 53%, 46%)
HSV	hsv(235, 69%, 70%)
CMYK	cmyk(69.1%, 63.5%, 0%, 30.2%)
CIE-LAB	lab(33.58, 33.60, -61.27)
CIE-LCH	lch(33.58, 69.88, 298.74°)
OKLab	oklab(44.09% 0.0087 -0.1768)
OKLCH	oklch(44.09% 0.177 272.8)
XYZ	xyz(11.4990, 7.8061, 43.0116)
Luminance	0.0781 (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

#3741B2 #B2A837

analogous

#377EB2 #3741B2 #6A37B2

triadic

#3741B2 #B23741 #41B237

tetradic

#3741B2 #B2377E #B2A837 #37B26A

square

#3741B2 #B2377E #B2A837 #37B26A

split-complementary

#3741B2 #B26A37 #7EB237

monochromatic

#1A1F54 #293083 #3741B2 #5A63CC #8990DB

Accessibility & contrast

On white

8.20

#3741B2 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.56

#3741B2 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3741B2

8.20:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3741B2	#FFFFFF	#000000	##FFFFFF
##3741B2	1.00	8.20	2.56	8.20
#FFFFFF	8.20	1.00	21.00	1.00
#000000	2.56	21.00	1.00	21.00
##FFFFFF	8.20	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0055B6

Deuteranopia (green-blind)

#0049B0

Tritanopia (blue-blind)

#005E73

Achromatopsia (no color)

#4F4F4F

Design tokens & code

CSS

--color: #3741b2;
/* rgb */ color: rgb(55, 65, 178);
/* oklch */ color: oklch(44.1% 0.177 272.8);

Tailwind

colors: {
  custom: {
    50: '#7e75ca',
    500: '#3741b2',
    950: '#000000',
  },
}

SCSS

$custom: #3741b2;
$custom-light: #7e75ca;
$custom-dark: #000000;

JSON

{
  "hex": "#3741b2",
  "rgb": {
    "r": 55,
    "g": 65,
    "b": 178
  },
  "hsl": {
    "h": 235.122,
    "s": 52.79,
    "l": 45.686
  },
  "oklch": {
    "l": 0.44088,
    "c": 0.17705,
    "h": 272.8
  },
  "luminance": 0.07807
}

Semantic roles & 50–950 ramp

primary

#3741B2

secondary

#C5BF80

accent

#D04CDC

background

#F8F7FC

surface

#EFEDF8

border

#CAC8D1

text

#0B0813

muted

#7C7B82

Preview Lab

Preview with #3741B2

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

Preview Lab → · Contrast checker → · Palette generator →