#3731C5#3731C5

#3731C5 is a dark, highly saturated blue. Relative luminance 0.070; OKLCH L 43.4% C 0.218 H 274.2°. Best body text is #FFFFFF at 8.72:1 contrast (WCAG AA passes).

Color values

HEX	#3731C5
RGB	rgb(55, 49, 197)
HSL	hsl(242, 60%, 48%)
HSV	hsv(242, 75%, 77%)
CMYK	cmyk(72.1%, 75.1%, 0%, 22.7%)
CIE-LAB	lab(31.90, 49.50, -75.24)
CIE-LCH	lch(31.90, 90.06, 303.34°)
OKLab	oklab(43.42% 0.0159 -0.2176)
OKLCH	oklch(43.42% 0.218 274.2)
XYZ	xyz(12.7486, 7.0388, 53.4993)
Luminance	0.0704 (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

#3731C5 #BFC531

analogous

#3175C5 #3731C5 #8131C5

triadic

#3731C5 #C53731 #31C537

tetradic

#3731C5 #C53175 #BFC531 #31C581

square

#3731C5 #C53175 #BFC531 #31C581

split-complementary

#3731C5 #C58131 #75C531

monochromatic

#1C1963 #292594 #3731C5 #625DD7 #918EE3

Accessibility & contrast

On white

8.72

#3731C5 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.41

#3731C5 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3731C5

8.72:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3731C5	#FFFFFF	#000000	##FFFFFF
##3731C5	1.00	8.72	2.41	8.72
#FFFFFF	8.72	1.00	21.00	1.00
#000000	2.41	21.00	1.00	21.00
##FFFFFF	8.72	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0052C9

Deuteranopia (green-blind)

#0044C2

Tritanopia (blue-blind)

#005C79

Achromatopsia (no color)

#4B4B4B

Design tokens & code

CSS

--color: #3731c5;
/* rgb */ color: rgb(55, 49, 197);
/* oklch */ color: oklch(43.4% 0.218 274.2);

Tailwind

colors: {
  custom: {
    50: '#836cd8',
    500: '#3731c5',
    950: '#000000',
  },
}

SCSS

$custom: #3731c5;
$custom-light: #836cd8;
$custom-dark: #000000;

JSON

{
  "hex": "#3731c5",
  "rgb": {
    "r": 55,
    "g": 49,
    "b": 197
  },
  "hsl": {
    "h": 242.432,
    "s": 60.163,
    "l": 48.235
  },
  "oklch": {
    "l": 0.4342,
    "c": 0.21822,
    "h": 274.2
  },
  "luminance": 0.0704
}

Semantic roles & 50–950 ramp

primary

#3731C5

secondary

#CACD85

accent

#E344DD

background

#F8F6FD

surface

#F0EBFB

border

#CBC6D4

text

#0D0715

muted

#7D7A83

Preview Lab

Preview with #3731C5

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

Preview Lab → · Contrast checker → · Palette generator →