#3741B3#3741B3

#3741B3 is a dark, vivid blue. Relative luminance 0.078; OKLCH L 44.2% C 0.178 H 272.8°. Best body text is #FFFFFF at 8.17:1 contrast (WCAG AA passes).

Color values

HEX	#3741B3
RGB	rgb(55, 65, 179)
HSL	hsl(235, 53%, 46%)
HSV	hsv(235, 69%, 70%)
CMYK	cmyk(69.3%, 63.7%, 0%, 29.8%)
CIE-LAB	lab(33.66, 33.96, -61.73)
CIE-LCH	lch(33.66, 70.45, 298.82°)
OKLab	oklab(44.18% 0.0086 -0.1782)
OKLCH	oklch(44.18% 0.178 272.8)
XYZ	xyz(11.5998, 7.8464, 43.5423)
Luminance	0.0785 (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

#3741B3 #B3A937

analogous

#377FB3 #3741B3 #6B37B3

triadic

#3741B3 #B33741 #41B337

tetradic

#3741B3 #B3377F #B3A937 #37B36B

square

#3741B3 #B3377F #B3A937 #37B36B

split-complementary

#3741B3 #B36B37 #7FB337

monochromatic

#1A1F55 #293084 #3741B3 #5B64CD #8A90DB

Accessibility & contrast

On white

8.17

#3741B3 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.57

#3741B3 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3741B3

8.17:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3741B3	#FFFFFF	#000000	##FFFFFF
##3741B3	1.00	8.17	2.57	8.17
#FFFFFF	8.17	1.00	21.00	1.00
#000000	2.57	21.00	1.00	21.00
##FFFFFF	8.17	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0055B7

Deuteranopia (green-blind)

#004AB1

Tritanopia (blue-blind)

#005E74

Achromatopsia (no color)

#4F4F4F

Design tokens & code

CSS

--color: #3741b3;
/* rgb */ color: rgb(55, 65, 179);
/* oklch */ color: oklch(44.2% 0.178 272.8);

Tailwind

colors: {
  custom: {
    50: '#7e75cb',
    500: '#3741b3',
    950: '#000000',
  },
}

SCSS

$custom: #3741b3;
$custom-light: #7e75cb;
$custom-dark: #000000;

JSON

{
  "hex": "#3741b3",
  "rgb": {
    "r": 55,
    "g": 65,
    "b": 179
  },
  "hsl": {
    "h": 235.161,
    "s": 52.991,
    "l": 45.882
  },
  "oklch": {
    "l": 0.44177,
    "c": 0.17838,
    "h": 272.8
  },
  "luminance": 0.07847
}

Semantic roles & 50–950 ramp

primary

#3741B3

secondary

#C5C081

accent

#D14BDC

background

#F8F7FC

surface

#EFEDF9

border

#CAC8D2

text

#0B0813

muted

#7C7B82

Preview Lab

Preview with #3741B3

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

Preview Lab → · Contrast checker → · Palette generator →