#3753B9#3753B9

#3753B9 is a mid, vivid blue. Relative luminance 0.105; OKLCH L 48.1% C 0.164 H 268.1°. Best body text is #FFFFFF at 6.77:1 contrast (WCAG AA passes).

Color values

HEX	#3753B9
RGB	rgb(55, 83, 185)
HSL	hsl(227, 54%, 47%)
HSV	hsv(227, 70%, 73%)
CMYK	cmyk(70.3%, 55.1%, 0%, 27.5%)
CIE-LAB	lab(38.73, 24.49, -57.02)
CIE-LCH	lch(38.73, 62.06, 293.24°)
OKLab	oklab(48.09% -0.0056 -0.1641)
OKLCH	oklch(48.09% 0.164 268.1)
XYZ	xyz(13.4227, 10.5002, 47.2089)
Luminance	0.1050 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3753B9 #B99D37

analogous

#3794B9 #3753B9 #5C37B9

triadic

#3753B9 #B93753 #53B937

tetradic

#3753B9 #B93794 #B99D37 #37B95C

square

#3753B9 #B93794 #B99D37 #37B95C

split-complementary

#3753B9 #B95C37 #94B937

monochromatic

#1B295B #293E8A #3753B9 #5E76CF #8D9EDD

Accessibility & contrast

On white

6.77

#3753B9 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.10

#3753B9 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3753B9

6.77:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3753B9	#FFFFFF	#000000	##FFFFFF
##3753B9	1.00	6.77	3.10	6.77
#FFFFFF	6.77	1.00	21.00	1.00
#000000	3.10	21.00	1.00	21.00
##FFFFFF	6.77	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0061BD

Deuteranopia (green-blind)

#0055B7

Tritanopia (blue-blind)

#006C7E

Achromatopsia (no color)

#5B5B5B

Design tokens & code

CSS

--color: #3753b9;
/* rgb */ color: rgb(55, 83, 185);
/* oklch */ color: oklch(48.1% 0.164 268.1);

Tailwind

colors: {
  custom: {
    50: '#7e83cf',
    500: '#3753b9',
    950: '#000000',
  },
}

SCSS

$custom: #3753b9;
$custom-light: #7e83cf;
$custom-dark: #000000;

JSON

{
  "hex": "#3753b9",
  "rgb": {
    "r": 55,
    "g": 83,
    "b": 185
  },
  "hsl": {
    "h": 227.077,
    "s": 54.167,
    "l": 47.059
  },
  "oklch": {
    "l": 0.48091,
    "c": 0.16423,
    "h": 268.1
  },
  "luminance": 0.10502
}

Semantic roles & 50–950 ramp

primary

#3753B9

secondary

#C8B984

accent

#BE4ADE

background

#F8F7FC

surface

#EFEEF9

border

#CAC9D2

text

#0B0A14

muted

#7C7C82

Preview Lab

Preview with #3753B9

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

Preview Lab → · Contrast checker → · Palette generator →