#3745B9#3745B9

#3745B9 is a mid, vivid blue. Relative luminance 0.086; OKLCH L 45.4% C 0.182 H 271.7°. Best body text is #FFFFFF at 7.74:1 contrast (WCAG AA passes).

Color values

HEX	#3745B9
RGB	rgb(55, 69, 185)
HSL	hsl(234, 54%, 47%)
HSV	hsv(234, 70%, 73%)
CMYK	cmyk(70.3%, 62.7%, 0%, 27.5%)
CIE-LAB	lab(35.14, 33.54, -62.85)
CIE-LCH	lch(35.14, 71.24, 298.09°)
OKLab	oklab(45.42% 0.0054 -0.1814)
OKLCH	oklch(45.42% 0.182 271.7)
XYZ	xyz(12.4577, 8.5700, 46.8872)
Luminance	0.0857 (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

#3745B9 #B9AB37

analogous

#3786B9 #3745B9 #6A37B9

triadic

#3745B9 #B93745 #45B937

tetradic

#3745B9 #B93786 #B9AB37 #37B96A

square

#3745B9 #B93786 #B9AB37 #37B96A

split-complementary

#3745B9 #B96A37 #86B937

monochromatic

#1B225B #29338A #3745B9 #5E6ACF #8D96DD

Accessibility & contrast

On white

7.74

#3745B9 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.71

#3745B9 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3745B9

7.74:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3745B9	#FFFFFF	#000000	##FFFFFF
##3745B9	1.00	7.74	2.71	7.74
#FFFFFF	7.74	1.00	21.00	1.00
#000000	2.71	21.00	1.00	21.00
##FFFFFF	7.74	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0059BD

Deuteranopia (green-blind)

#004DB7

Tritanopia (blue-blind)

#006378

Achromatopsia (no color)

#535353

Design tokens & code

CSS

--color: #3745b9;
/* rgb */ color: rgb(55, 69, 185);
/* oklch */ color: oklch(45.4% 0.182 271.7);

Tailwind

colors: {
  custom: {
    50: '#7f78cf',
    500: '#3745b9',
    950: '#000000',
  },
}

SCSS

$custom: #3745b9;
$custom-light: #7f78cf;
$custom-dark: #000000;

JSON

{
  "hex": "#3745b9",
  "rgb": {
    "r": 55,
    "g": 69,
    "b": 185
  },
  "hsl": {
    "h": 233.538,
    "s": 54.167,
    "l": 47.059
  },
  "oklch": {
    "l": 0.45424,
    "c": 0.18152,
    "h": 271.7
  },
  "luminance": 0.08571
}

Semantic roles & 50–950 ramp

primary

#3745B9

secondary

#C8C084

accent

#CE4ADE

background

#F8F7FC

surface

#F0EDF9

border

#CBC8D2

text

#0B0914

muted

#7C7B82

Preview Lab

Preview with #3745B9

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

Preview Lab → · Contrast checker → · Palette generator →