#3741B1#3741B1

#3741B1 is a dark, vivid blue. Relative luminance 0.078; OKLCH L 44.0% C 0.176 H 272.9°. Best body text is #FFFFFF at 8.22:1 contrast (WCAG AA passes).

Color values

HEX	#3741B1
RGB	rgb(55, 65, 177)
HSL	hsl(235, 53%, 45%)
HSV	hsv(235, 69%, 69%)
CMYK	cmyk(68.9%, 63.3%, 0%, 30.6%)
CIE-LAB	lab(33.49, 33.25, -60.82)
CIE-LCH	lch(33.49, 69.31, 298.67°)
OKLab	oklab(44% 0.0087 -0.1755)
OKLCH	oklch(44% 0.176 272.9)
XYZ	xyz(11.3990, 7.7661, 42.4847)
Luminance	0.0777 (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

#3741B1 #B1A737

analogous

#377EB1 #3741B1 #6A37B1

triadic

#3741B1 #B13741 #41B137

tetradic

#3741B1 #B1377E #B1A737 #37B16A

square

#3741B1 #B1377E #B1A737 #37B16A

split-complementary

#3741B1 #B16A37 #7EB137

monochromatic

#1A1F54 #283082 #3741B1 #5A63CC #888FDA

Accessibility & contrast

On white

8.22

#3741B1 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.55

#3741B1 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3741B1

8.22:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3741B1	#FFFFFF	#000000	##FFFFFF
##3741B1	1.00	8.22	2.55	8.22
#FFFFFF	8.22	1.00	21.00	1.00
#000000	2.55	21.00	1.00	21.00
##FFFFFF	8.22	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0054B5

Deuteranopia (green-blind)

#0049AF

Tritanopia (blue-blind)

#005E73

Achromatopsia (no color)

#4F4F4F

Design tokens & code

CSS

--color: #3741b1;
/* rgb */ color: rgb(55, 65, 177);
/* oklch */ color: oklch(44.0% 0.176 272.9);

Tailwind

colors: {
  custom: {
    50: '#7e75c9',
    500: '#3741b1',
    950: '#000000',
  },
}

SCSS

$custom: #3741b1;
$custom-light: #7e75c9;
$custom-dark: #000000;

JSON

{
  "hex": "#3741b1",
  "rgb": {
    "r": 55,
    "g": 65,
    "b": 177
  },
  "hsl": {
    "h": 235.082,
    "s": 52.586,
    "l": 45.49
  },
  "oklch": {
    "l": 0.44,
    "c": 0.17572,
    "h": 272.9
  },
  "luminance": 0.07767
}

Semantic roles & 50–950 ramp

primary

#3741B1

secondary

#C4BF80

accent

#D04CDC

background

#F8F7FC

surface

#EFEDF8

border

#CAC8D1

text

#0B0813

muted

#7C7B82

Preview Lab

Preview with #3741B1

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

Preview Lab → · Contrast checker → · Palette generator →