#3748C7#3748C7

#3748C7 is a mid, vivid blue. Relative luminance 0.096; OKLCH L 47.2% C 0.196 H 270.8°. Best body text is #FFFFFF at 7.21:1 contrast (WCAG AA passes).

Color values

HEX	#3748C7
RGB	rgb(55, 72, 199)
HSL	hsl(233, 57%, 50%)
HSV	hsv(233, 72%, 78%)
CMYK	cmyk(72.4%, 63.8%, 0%, 22%)
CIE-LAB	lab(37.06, 36.60, -67.92)
CIE-LCH	lch(37.06, 77.15, 298.32°)
OKLab	oklab(47.2% 0.0027 -0.1963)
OKLCH	oklch(47.2% 0.196 270.8)
XYZ	xyz(14.1982, 9.5690, 55.1205)
Luminance	0.0957 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Blue With A Hint Of Purple

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3748C7 #C7B637

analogous

#3790C7 #3748C7 #6E37C7

triadic

#3748C7 #C73748 #48C737

tetradic

#3748C7 #C73790 #C7B637 #37C76E

square

#3748C7 #C73790 #C7B637 #37C76E

split-complementary

#3748C7 #C76E37 #90C737

monochromatic

#1C2567 #2A3797 #3748C7 #6673D5 #969FE2

Accessibility & contrast

On white

7.21

#3748C7 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.91

#3748C7 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3748C7

7.21:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3748C7	#FFFFFF	#000000	##FFFFFF
##3748C7	1.00	7.21	2.91	7.21
#FFFFFF	7.21	1.00	21.00	1.00
#000000	2.91	21.00	1.00	21.00
##FFFFFF	7.21	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#005ECB

Deuteranopia (green-blind)

#0051C5

Tritanopia (blue-blind)

#006981

Achromatopsia (no color)

#575757

Design tokens & code

CSS

--color: #3748c7;
/* rgb */ color: rgb(55, 72, 199);
/* oklch */ color: oklch(47.2% 0.196 270.8);

Tailwind

colors: {
  custom: {
    50: '#827bd9',
    500: '#3748c7',
    950: '#000000',
  },
}

SCSS

$custom: #3748c7;
$custom-light: #827bd9;
$custom-dark: #000000;

JSON

{
  "hex": "#3748c7",
  "rgb": {
    "r": 55,
    "g": 72,
    "b": 199
  },
  "hsl": {
    "h": 232.917,
    "s": 56.693,
    "l": 49.804
  },
  "oklch": {
    "l": 0.47198,
    "c": 0.19629,
    "h": 270.8
  },
  "luminance": 0.0957
}

Semantic roles & 50–950 ramp

primary

#3748C7

secondary

#CDC68C

accent

#CE48E0

background

#F8F7FD

surface

#F0EDFB

border

#CBC8D4

text

#0C0915

muted

#7D7B83

Preview Lab

Preview with #3748C7

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

Preview Lab → · Contrast checker → · Palette generator →