#3753BB#3753BB

#3753BB is a mid, vivid blue. Relative luminance 0.106; OKLCH L 48.2% C 0.167 H 268.1°. Best body text is #FFFFFF at 6.74:1 contrast (WCAG AA passes).

Color values

HEX	#3753BB
RGB	rgb(55, 83, 187)
HSL	hsl(227, 55%, 47%)
HSV	hsv(227, 71%, 73%)
CMYK	cmyk(70.6%, 55.6%, 0%, 26.7%)
CIE-LAB	lab(38.87, 25.22, -57.95)
CIE-LCH	lch(38.87, 63.20, 293.52°)
OKLab	oklab(48.25% -0.0055 -0.1669)
OKLCH	oklch(48.25% 0.167 268.1)
XYZ	xyz(13.6353, 10.5852, 48.3286)
Luminance	0.1059 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3753BB #BB9F37

analogous

#3795BB #3753BB #5D37BB

triadic

#3753BB #BB3753 #53BB37

tetradic

#3753BB #BB3795 #BB9F37 #37BB5D

square

#3753BB #BB3795 #BB9F37 #37BB5D

split-complementary

#3753BB #BB5D37 #95BB37

monochromatic

#1B295C #293E8C #3753BB #5F77D0 #8E9FDE

Accessibility & contrast

On white

6.74

#3753BB on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.12

#3753BB on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3753BB

6.74:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3753BB	#FFFFFF	#000000	##FFFFFF
##3753BB	1.00	6.74	3.12	6.74
#FFFFFF	6.74	1.00	21.00	1.00
#000000	3.12	21.00	1.00	21.00
##FFFFFF	6.74	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0062BF

Deuteranopia (green-blind)

#0056B9

Tritanopia (blue-blind)

#006C7F

Achromatopsia (no color)

#5C5C5C

Design tokens & code

CSS

--color: #3753bb;
/* rgb */ color: rgb(55, 83, 187);
/* oklch */ color: oklch(48.2% 0.167 268.1);

Tailwind

colors: {
  custom: {
    50: '#7e83d0',
    500: '#3753bb',
    950: '#000000',
  },
}

SCSS

$custom: #3753bb;
$custom-light: #7e83d0;
$custom-dark: #000000;

JSON

{
  "hex": "#3753bb",
  "rgb": {
    "r": 55,
    "g": 83,
    "b": 187
  },
  "hsl": {
    "h": 227.273,
    "s": 54.545,
    "l": 47.451
  },
  "oklch": {
    "l": 0.48248,
    "c": 0.16697,
    "h": 268.1
  },
  "luminance": 0.10587
}

Semantic roles & 50–950 ramp

primary

#3753BB

secondary

#C9BA85

accent

#BF4ADE

background

#F8F7FC

surface

#EFEEF9

border

#CAC9D2

text

#0B0A14

muted

#7C7C82

Preview Lab

Preview with #3753BB

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

Preview Lab → · Contrast checker → · Palette generator →