#3F37BE#3F37BE

#3F37BE is a dark, highly saturated blue. Relative luminance 0.075; OKLCH L 44.1% C 0.202 H 276.8°. Best body text is #FFFFFF at 8.40:1 contrast (WCAG AA passes).

Color values

HEX	#3F37BE
RGB	rgb(63, 55, 190)
HSL	hsl(244, 55%, 48%)
HSV	hsv(244, 71%, 75%)
CMYK	cmyk(66.8%, 71.1%, 0%, 25.5%)
CIE-LAB	lab(32.93, 44.76, -69.40)
CIE-LCH	lch(32.93, 82.58, 302.82°)
OKLab	oklab(44.09% 0.0239 -0.2004)
OKLCH	oklch(44.09% 0.202 276.8)
XYZ	xyz(12.7073, 7.5057, 49.4843)
Luminance	0.0751 (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

#3F37BE #B6BE37

analogous

#3772BE #3F37BE #8337BE

triadic

#3F37BE #BE3F37 #37BE3F

tetradic

#3F37BE #BE3772 #B6BE37 #37BE83

square

#3F37BE #BE3772 #B6BE37 #37BE83

split-complementary

#3F37BE #BE8337 #72BE37

monochromatic

#201C5F #2F298F #3F37BE #6861D1 #9590DF

Accessibility & contrast

On white

8.40

#3F37BE on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.50

#3F37BE on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3F37BE

8.40:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F37BE	#FFFFFF	#000000	##FFFFFF
##3F37BE	1.00	8.40	2.50	8.40
#FFFFFF	8.40	1.00	21.00	1.00
#000000	2.50	21.00	1.00	21.00
##FFFFFF	8.40	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0053C2

Deuteranopia (green-blind)

#0048BC

Tritanopia (blue-blind)

#005C77

Achromatopsia (no color)

#4D4D4D

Design tokens & code

CSS

--color: #3f37be;
/* rgb */ color: rgb(63, 55, 190);
/* oklch */ color: oklch(44.1% 0.202 276.8);

Tailwind

colors: {
  custom: {
    50: '#856fd3',
    500: '#3f37be',
    950: '#000000',
  },
}

SCSS

$custom: #3f37be;
$custom-light: #856fd3;
$custom-dark: #000000;

JSON

{
  "hex": "#3f37be",
  "rgb": {
    "r": 63,
    "g": 55,
    "b": 190
  },
  "hsl": {
    "h": 243.556,
    "s": 55.102,
    "l": 48.039
  },
  "oklch": {
    "l": 0.44089,
    "c": 0.20187,
    "h": 276.8
  },
  "luminance": 0.07507
}

Semantic roles & 50–950 ramp

primary

#3F37BE

secondary

#C6CA87

accent

#DE49D6

background

#F8F6FD

surface

#F0ECFA

border

#CBC7D3

text

#0C0714

muted

#7D7A83

Preview Lab

Preview with #3F37BE

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

Preview Lab → · Contrast checker → · Palette generator →