#3743B0#3743B0

#3743B0 is a dark, vivid blue. Relative luminance 0.080; OKLCH L 44.3% C 0.172 H 272.4°. Best body text is #FFFFFF at 8.10:1 contrast (WCAG AA passes).

Color values

HEX	#3743B0
RGB	rgb(55, 67, 176)
HSL	hsl(234, 52%, 45%)
HSV	hsv(234, 69%, 69%)
CMYK	cmyk(68.8%, 61.9%, 0%, 31%)
CIE-LAB	lab(33.90, 31.62, -59.56)
CIE-LCH	lch(33.90, 67.43, 297.96°)
OKLab	oklab(44.27% 0.0072 -0.1718)
OKLCH	oklch(44.27% 0.172 272.4)
XYZ	xyz(11.4165, 7.9600, 42.0007)
Luminance	0.0796 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Blue With A Hint Of Purple

#533CC6

ΔE00 5.84

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3743B0 #B0A437

analogous

#377FB0 #3743B0 #6837B0

triadic

#3743B0 #B03743 #43B037

tetradic

#3743B0 #B0377F #B0A437 #37B068

square

#3743B0 #B0377F #B0A437 #37B068

split-complementary

#3743B0 #B06837 #7FB037

monochromatic

#1A1F53 #283181 #3743B0 #5964CB #8890DA

Accessibility & contrast

On white

8.10

#3743B0 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.59

#3743B0 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3743B0

8.10:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3743B0	#FFFFFF	#000000	##FFFFFF
##3743B0	1.00	8.10	2.59	8.10
#FFFFFF	8.10	1.00	21.00	1.00
#000000	2.59	21.00	1.00	21.00
##FFFFFF	8.10	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0055B4

Deuteranopia (green-blind)

#004AAE

Tritanopia (blue-blind)

#005F73

Achromatopsia (no color)

#505050

Design tokens & code

CSS

--color: #3743b0;
/* rgb */ color: rgb(55, 67, 176);
/* oklch */ color: oklch(44.3% 0.172 272.4);

Tailwind

colors: {
  custom: {
    50: '#7d77c8',
    500: '#3743b0',
    950: '#000000',
  },
}

SCSS

$custom: #3743b0;
$custom-light: #7d77c8;
$custom-dark: #000000;

JSON

{
  "hex": "#3743b0",
  "rgb": {
    "r": 55,
    "g": 67,
    "b": 176
  },
  "hsl": {
    "h": 234.05,
    "s": 52.381,
    "l": 45.294
  },
  "oklch": {
    "l": 0.44274,
    "c": 0.17193,
    "h": 272.4
  },
  "luminance": 0.07961
}

Semantic roles & 50–950 ramp

primary

#3743B0

secondary

#C4BD7F

accent

#CE4CDC

background

#F8F7FC

surface

#EFEDF8

border

#CAC8D1

text

#0B0813

muted

#7C7B82

Preview Lab

Preview with #3743B0

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

Preview Lab → · Contrast checker → · Palette generator →