#3753B7#3753B7

#3753B7 is a mid, vivid blue. Relative luminance 0.104; OKLCH L 47.9% C 0.161 H 268.0°. Best body text is #FFFFFF at 6.81:1 contrast (WCAG AA passes).

Color values

HEX	#3753B7
RGB	rgb(55, 83, 183)
HSL	hsl(227, 54%, 47%)
HSV	hsv(227, 70%, 72%)
CMYK	cmyk(69.9%, 54.6%, 0%, 28.2%)
CIE-LAB	lab(38.58, 23.76, -56.08)
CIE-LCH	lch(38.58, 60.91, 292.96°)
OKLab	oklab(47.94% -0.0057 -0.1614)
OKLCH	oklch(47.94% 0.161 268)
XYZ	xyz(13.2131, 10.4163, 46.1048)
Luminance	0.1042 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3753B7 #B79B37

analogous

#3793B7 #3753B7 #5B37B7

triadic

#3753B7 #B73753 #53B737

tetradic

#3753B7 #B73793 #B79B37 #37B75B

square

#3753B7 #B73793 #B79B37 #37B75B

split-complementary

#3753B7 #B75B37 #93B737

monochromatic

#1B2859 #293E88 #3753B7 #5D76CE #8C9EDC

Accessibility & contrast

On white

6.81

#3753B7 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.08

#3753B7 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3753B7

6.81:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3753B7	#FFFFFF	#000000	##FFFFFF
##3753B7	1.00	6.81	3.08	6.81
#FFFFFF	6.81	1.00	21.00	1.00
#000000	3.08	21.00	1.00	21.00
##FFFFFF	6.81	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0061BA

Deuteranopia (green-blind)

#0055B5

Tritanopia (blue-blind)

#006B7D

Achromatopsia (no color)

#5B5B5B

Design tokens & code

CSS

--color: #3753b7;
/* rgb */ color: rgb(55, 83, 183);
/* oklch */ color: oklch(47.9% 0.161 268.0);

Tailwind

colors: {
  custom: {
    50: '#7e83cd',
    500: '#3753b7',
    950: '#000000',
  },
}

SCSS

$custom: #3753b7;
$custom-light: #7e83cd;
$custom-dark: #000000;

JSON

{
  "hex": "#3753b7",
  "rgb": {
    "r": 55,
    "g": 83,
    "b": 183
  },
  "hsl": {
    "h": 226.875,
    "s": 53.782,
    "l": 46.667
  },
  "oklch": {
    "l": 0.47935,
    "c": 0.16148,
    "h": 268
  },
  "luminance": 0.10418
}

Semantic roles & 50–950 ramp

primary

#3753B7

secondary

#C7B883

accent

#BD4BDD

background

#F8F7FC

surface

#EFEEF9

border

#CAC9D2

text

#0B0A14

muted

#7C7C82

Preview Lab

Preview with #3753B7

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

Preview Lab → · Contrast checker → · Palette generator →