#3753C7#3753C7

#3753C7 is a mid, vivid blue. Relative luminance 0.111; OKLCH L 49.2% C 0.183 H 268.4°. Best body text is #FFFFFF at 6.51:1 contrast (WCAG AA passes).

Color values

HEX	#3753C7
RGB	rgb(55, 83, 199)
HSL	hsl(228, 57%, 50%)
HSV	hsv(228, 72%, 78%)
CMYK	cmyk(72.4%, 58.3%, 0%, 22%)
CIE-LAB	lab(39.78, 29.60, -63.47)
CIE-LCH	lch(39.78, 70.03, 295.00°)
OKLab	oklab(49.22% -0.005 -0.1831)
OKLCH	oklch(49.22% 0.183 268.4)
XYZ	xyz(14.9740, 11.1207, 55.3791)
Luminance	0.1112 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3753C7 #C7AB37

analogous

#379BC7 #3753C7 #6337C7

triadic

#3753C7 #C73753 #53C737

tetradic

#3753C7 #C7379B #C7AB37 #37C763

square

#3753C7 #C7379B #C7AB37 #37C763

split-complementary

#3753C7 #C76337 #9BC737

monochromatic

#1C2B67 #2A3F97 #3753C7 #667CD5 #96A5E2

Accessibility & contrast

On white

6.51

#3753C7 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.22

#3753C7 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3753C7

6.51:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3753C7	#FFFFFF	#000000	##FFFFFF
##3753C7	1.00	6.51	3.22	6.51
#FFFFFF	6.51	1.00	21.00	1.00
#000000	3.22	21.00	1.00	21.00
##FFFFFF	6.51	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0065CB

Deuteranopia (green-blind)

#0057C5

Tritanopia (blue-blind)

#007085

Achromatopsia (no color)

#5E5E5E

Design tokens & code

CSS

--color: #3753c7;
/* rgb */ color: rgb(55, 83, 199);
/* oklch */ color: oklch(49.2% 0.183 268.4);

Tailwind

colors: {
  custom: {
    50: '#8183d9',
    500: '#3753c7',
    950: '#000000',
  },
}

SCSS

$custom: #3753c7;
$custom-light: #8183d9;
$custom-dark: #000000;

JSON

{
  "hex": "#3753c7",
  "rgb": {
    "r": 55,
    "g": 83,
    "b": 199
  },
  "hsl": {
    "h": 228.333,
    "s": 56.693,
    "l": 49.804
  },
  "oklch": {
    "l": 0.49216,
    "c": 0.18317,
    "h": 268.4
  },
  "luminance": 0.11122
}

Semantic roles & 50–950 ramp

primary

#3753C7

secondary

#CDC18C

accent

#C248E0

background

#F8F7FD

surface

#F0EEFB

border

#CBC9D4

text

#0C0A15

muted

#7D7C83

Preview Lab

Preview with #3753C7

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

Preview Lab → · Contrast checker → · Palette generator →