#3F37C3#3F37C3

#3F37C3 is a dark, highly saturated blue. Relative luminance 0.077; OKLCH L 44.6% C 0.208 H 276.4°. Best body text is #FFFFFF at 8.25:1 contrast (WCAG AA passes).

Color values

HEX	#3F37C3
RGB	rgb(63, 55, 195)
HSL	hsl(243, 56%, 49%)
HSV	hsv(243, 72%, 76%)
CMYK	cmyk(67.7%, 71.8%, 0%, 23.5%)
CIE-LAB	lab(33.41, 46.37, -71.55)
CIE-LCH	lch(33.41, 85.26, 302.94°)
OKLab	oklab(44.58% 0.023 -0.2067)
OKLCH	oklch(44.58% 0.208 276.4)
XYZ	xyz(13.2632, 7.7281, 52.4119)
Luminance	0.0773 (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

#3F37C3 #BBC337

analogous

#3775C3 #3F37C3 #8537C3

triadic

#3F37C3 #C33F37 #37C33F

tetradic

#3F37C3 #C33775 #BBC337 #37C385

square

#3F37C3 #C33775 #BBC337 #37C385

split-complementary

#3F37C3 #C38537 #75C337

monochromatic

#201C64 #302A93 #3F37C3 #6A64D3 #9894E1

Accessibility & contrast

On white

8.25

#3F37C3 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.55

#3F37C3 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3F37C3

8.25:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F37C3	#FFFFFF	#000000	##FFFFFF
##3F37C3	1.00	8.25	2.55	8.25
#FFFFFF	8.25	1.00	21.00	1.00
#000000	2.55	21.00	1.00	21.00
##FFFFFF	8.25	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0055C7

Deuteranopia (green-blind)

#0048C0

Tritanopia (blue-blind)

#005E79

Achromatopsia (no color)

#4F4F4F

Design tokens & code

CSS

--color: #3f37c3;
/* rgb */ color: rgb(63, 55, 195);
/* oklch */ color: oklch(44.6% 0.208 276.4);

Tailwind

colors: {
  custom: {
    50: '#8670d6',
    500: '#3f37c3',
    950: '#000000',
  },
}

SCSS

$custom: #3f37c3;
$custom-light: #8670d6;
$custom-dark: #000000;

JSON

{
  "hex": "#3f37c3",
  "rgb": {
    "r": 63,
    "g": 55,
    "b": 195
  },
  "hsl": {
    "h": 243.429,
    "s": 56,
    "l": 49.02
  },
  "oklch": {
    "l": 0.44576,
    "c": 0.20801,
    "h": 276.4
  },
  "luminance": 0.07729
}

Semantic roles & 50–950 ramp

primary

#3F37C3

secondary

#C8CC8A

accent

#DF49D7

background

#F8F6FD

surface

#F0ECFA

border

#CBC7D3

text

#0D0714

muted

#7D7A83

Preview Lab

Preview with #3F37C3

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

Preview Lab → · Contrast checker → · Palette generator →