#3743B9#3743B9

#3743B9 is a mid, vivid blue. Relative luminance 0.083; OKLCH L 45.1% C 0.184 H 272.1°. Best body text is #FFFFFF at 7.88:1 contrast (WCAG AA passes).

Color values

HEX	#3743B9
RGB	rgb(55, 67, 185)
HSL	hsl(234, 54%, 47%)
HSV	hsv(234, 70%, 73%)
CMYK	cmyk(70.3%, 63.8%, 0%, 27.5%)
CIE-LAB	lab(34.66, 34.81, -63.65)
CIE-LCH	lch(34.66, 72.54, 298.67°)
OKLab	oklab(45.07% 0.0068 -0.1838)
OKLCH	oklch(45.07% 0.184 272.1)
XYZ	xyz(12.3367, 8.3281, 46.8469)
Luminance	0.0833 (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

#3743B9 #B9AD37

analogous

#3784B9 #3743B9 #6C37B9

triadic

#3743B9 #B93743 #43B937

tetradic

#3743B9 #B93784 #B9AD37 #37B96C

square

#3743B9 #B93784 #B9AD37 #37B96C

split-complementary

#3743B9 #B96C37 #84B937

monochromatic

#1B215B #29328A #3743B9 #5E68CF #8D95DD

Accessibility & contrast

On white

7.88

#3743B9 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.67

#3743B9 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3743B9

7.88:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3743B9	#FFFFFF	#000000	##FFFFFF
##3743B9	1.00	7.88	2.67	7.88
#FFFFFF	7.88	1.00	21.00	1.00
#000000	2.67	21.00	1.00	21.00
##FFFFFF	7.88	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0058BD

Deuteranopia (green-blind)

#004CB7

Tritanopia (blue-blind)

#006278

Achromatopsia (no color)

#515151

Design tokens & code

CSS

--color: #3743b9;
/* rgb */ color: rgb(55, 67, 185);
/* oklch */ color: oklch(45.1% 0.184 272.1);

Tailwind

colors: {
  custom: {
    50: '#7f77cf',
    500: '#3743b9',
    950: '#000000',
  },
}

SCSS

$custom: #3743b9;
$custom-light: #7f77cf;
$custom-dark: #000000;

JSON

{
  "hex": "#3743b9",
  "rgb": {
    "r": 55,
    "g": 67,
    "b": 185
  },
  "hsl": {
    "h": 234.462,
    "s": 54.167,
    "l": 47.059
  },
  "oklch": {
    "l": 0.45067,
    "c": 0.18391,
    "h": 272.1
  },
  "luminance": 0.08329
}

Semantic roles & 50–950 ramp

primary

#3743B9

secondary

#C8C184

accent

#D04ADE

background

#F8F7FC

surface

#F0EDF9

border

#CBC8D2

text

#0B0814

muted

#7C7B82

Preview Lab

Preview with #3743B9

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

Preview Lab → · Contrast checker → · Palette generator →