#3749C7#3749C7

#3749C7 is a mid, vivid blue. Relative luminance 0.097; OKLCH L 47.4% C 0.195 H 270.6°. Best body text is #FFFFFF at 7.14:1 contrast (WCAG AA passes).

Color values

HEX	#3749C7
RGB	rgb(55, 73, 199)
HSL	hsl(233, 57%, 50%)
HSV	hsv(233, 72%, 78%)
CMYK	cmyk(72.4%, 63.3%, 0%, 22%)
CIE-LAB	lab(37.30, 35.97, -67.53)
CIE-LCH	lch(37.30, 76.51, 298.05°)
OKLab	oklab(47.37% 0.002 -0.1951)
OKLCH	oklch(47.37% 0.195 270.6)
XYZ	xyz(14.2634, 9.6994, 55.1422)
Luminance	0.0970 (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

#3749C7 #C7B537

analogous

#3791C7 #3749C7 #6D37C7

triadic

#3749C7 #C73749 #49C737

tetradic

#3749C7 #C73791 #C7B537 #37C76D

square

#3749C7 #C73791 #C7B537 #37C76D

split-complementary

#3749C7 #C76D37 #91C737

monochromatic

#1C2667 #2A3797 #3749C7 #6674D5 #96A0E2

Accessibility & contrast

On white

7.14

#3749C7 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.94

#3749C7 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3749C7

7.14:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3749C7	#FFFFFF	#000000	##FFFFFF
##3749C7	1.00	7.14	2.94	7.14
#FFFFFF	7.14	1.00	21.00	1.00
#000000	2.94	21.00	1.00	21.00
##FFFFFF	7.14	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#005FCB

Deuteranopia (green-blind)

#0051C5

Tritanopia (blue-blind)

#006A81

Achromatopsia (no color)

#585858

Design tokens & code

CSS

--color: #3749c7;
/* rgb */ color: rgb(55, 73, 199);
/* oklch */ color: oklch(47.4% 0.195 270.6);

Tailwind

colors: {
  custom: {
    50: '#827bd9',
    500: '#3749c7',
    950: '#000000',
  },
}

SCSS

$custom: #3749c7;
$custom-light: #827bd9;
$custom-dark: #000000;

JSON

{
  "hex": "#3749c7",
  "rgb": {
    "r": 55,
    "g": 73,
    "b": 199
  },
  "hsl": {
    "h": 232.5,
    "s": 56.693,
    "l": 49.804
  },
  "oklch": {
    "l": 0.47374,
    "c": 0.19512,
    "h": 270.6
  },
  "luminance": 0.09701
}

Semantic roles & 50–950 ramp

primary

#3749C7

secondary

#CDC58C

accent

#CD48E0

background

#F8F7FD

surface

#F0EEFB

border

#CBC9D4

text

#0C0915

muted

#7D7B83

Preview Lab

Preview with #3749C7

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

Preview Lab → · Contrast checker → · Palette generator →