#3745B7#3745B7

#3745B7 is a mid, vivid blue. Relative luminance 0.085; OKLCH L 45.2% C 0.179 H 271.8°. Best body text is #FFFFFF at 7.79:1 contrast (WCAG AA passes).

Color values

HEX	#3745B7
RGB	rgb(55, 69, 183)
HSL	hsl(233, 54%, 47%)
HSV	hsv(233, 70%, 72%)
CMYK	cmyk(69.9%, 62.3%, 0%, 28.2%)
CIE-LAB	lab(34.98, 32.83, -61.95)
CIE-LCH	lch(34.98, 70.11, 297.92°)
OKLab	oklab(45.25% 0.0055 -0.1788)
OKLCH	oklch(45.25% 0.179 271.8)
XYZ	xyz(12.2480, 8.4862, 45.7831)
Luminance	0.0849 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Blue With A Hint Of Purple

#533CC6

ΔE00 5.53

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3745B7 #B7A937

analogous

#3785B7 #3745B7 #6937B7

triadic

#3745B7 #B73745 #45B737

tetradic

#3745B7 #B73785 #B7A937 #37B769

square

#3745B7 #B73785 #B7A937 #37B769

split-complementary

#3745B7 #B76937 #85B737

monochromatic

#1B2259 #293388 #3745B7 #5D69CE #8C95DC

Accessibility & contrast

On white

7.79

#3745B7 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.70

#3745B7 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3745B7

7.79:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3745B7	#FFFFFF	#000000	##FFFFFF
##3745B7	1.00	7.79	2.70	7.79
#FFFFFF	7.79	1.00	21.00	1.00
#000000	2.70	21.00	1.00	21.00
##FFFFFF	7.79	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0058BB

Deuteranopia (green-blind)

#004CB5

Tritanopia (blue-blind)

#006277

Achromatopsia (no color)

#525252

Design tokens & code

CSS

--color: #3745b7;
/* rgb */ color: rgb(55, 69, 183);
/* oklch */ color: oklch(45.2% 0.179 271.8);

Tailwind

colors: {
  custom: {
    50: '#7f78ce',
    500: '#3745b7',
    950: '#000000',
  },
}

SCSS

$custom: #3745b7;
$custom-light: #7f78ce;
$custom-dark: #000000;

JSON

{
  "hex": "#3745b7",
  "rgb": {
    "r": 55,
    "g": 69,
    "b": 183
  },
  "hsl": {
    "h": 233.438,
    "s": 53.782,
    "l": 46.667
  },
  "oklch": {
    "l": 0.45248,
    "c": 0.17886,
    "h": 271.8
  },
  "luminance": 0.08487
}

Semantic roles & 50–950 ramp

primary

#3745B7

secondary

#C7BF83

accent

#CD4BDD

background

#F8F7FC

surface

#EFEDF9

border

#CAC8D2

text

#0B0914

muted

#7C7B82

Preview Lab

Preview with #3745B7

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

Preview Lab → · Contrast checker → · Palette generator →