#3731DA#3731DA

#3731DA is a mid, highly saturated blue. Relative luminance 0.081; OKLCH L 45.6% C 0.243 H 272.7°. Best body text is #FFFFFF at 8.03:1 contrast (WCAG AA passes).

Color values

HEX	#3731DA
RGB	rgb(55, 49, 218)
HSL	hsl(242, 70%, 52%)
HSV	hsv(242, 78%, 85%)
CMYK	cmyk(74.8%, 77.5%, 0%, 14.5%)
CIE-LAB	lab(34.13, 56.07, -83.74)
CIE-LCH	lch(34.13, 100.78, 303.81°)
OKLab	oklab(45.65% 0.0116 -0.2423)
OKLCH	oklch(45.65% 0.243 272.7)
XYZ	xyz(15.3245, 8.0692, 67.0659)
Luminance	0.0807 (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

#3731DA #D4DA31

analogous

#3180DA #3731DA #8B31DA

triadic

#3731DA #DA3731 #31DA37

tetradic

#3731DA #DA3180 #D4DA31 #31DA8B

square

#3731DA #DA3180 #D4DA31 #31DA8B

split-complementary

#3731DA #DA8B31 #80DA31

monochromatic

#1A167B #241FAE #3731DA #6965E3 #9C99ED

Accessibility & contrast

On white

8.03

#3731DA on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.61

#3731DA on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3731DA

8.03:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3731DA	#FFFFFF	#000000	##FFFFFF
##3731DA	1.00	8.03	2.61	8.03
#FFFFFF	8.03	1.00	21.00	1.00
#000000	2.61	21.00	1.00	21.00
##FFFFFF	8.03	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0058DF

Deuteranopia (green-blind)

#0048D7

Tritanopia (blue-blind)

#006585

Achromatopsia (no color)

#505050

Design tokens & code

CSS

--color: #3731da;
/* rgb */ color: rgb(55, 49, 218);
/* oklch */ color: oklch(45.6% 0.243 272.7);

Tailwind

colors: {
  custom: {
    50: '#886de7',
    500: '#3731da',
    950: '#000000',
  },
}

SCSS

$custom: #3731da;
$custom-light: #886de7;
$custom-dark: #000000;

JSON

{
  "hex": "#3731da",
  "rgb": {
    "r": 55,
    "g": 49,
    "b": 218
  },
  "hsl": {
    "h": 242.13,
    "s": 69.547,
    "l": 52.353
  },
  "oklch": {
    "l": 0.45646,
    "c": 0.24262,
    "h": 272.7
  },
  "luminance": 0.08071
}

Semantic roles & 50–950 ramp

primary

#3731DA

secondary

#D6D88F

accent

#EC3BE6

background

#F9F6FE

surface

#F2ECFD

border

#CCC7D5

text

#0E0716

muted

#7E7A84

Preview Lab

Preview with #3731DA

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

Preview Lab → · Contrast checker → · Palette generator →