#3F49C5#3F49C5

#3F49C5 is a mid, vivid blue. Relative luminance 0.099; OKLCH L 47.6% C 0.190 H 273.2°. Best body text is #FFFFFF at 7.07:1 contrast (WCAG AA passes).

Color values

HEX	#3F49C5
RGB	rgb(63, 73, 197)
HSL	hsl(236, 54%, 51%)
HSV	hsv(236, 68%, 77%)
CMYK	cmyk(68%, 62.9%, 0%, 22.7%)
CIE-LAB	lab(37.57, 36.28, -65.89)
CIE-LCH	lch(37.57, 75.22, 298.84°)
OKLab	oklab(47.65% 0.0105 -0.1901)
OKLCH	oklch(47.65% 0.19 273.2)
XYZ	xyz(14.5071, 9.8517, 53.9495)
Luminance	0.0985 (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

#3F49C5 #C5BB3F

analogous

#3F8CC5 #3F49C5 #783FC5

triadic

#3F49C5 #C53F49 #49C53F

tetradic

#3F49C5 #C53F8C #C5BB3F #3FC578

square

#3F49C5 #C53F8C #C5BB3F #3FC578

split-complementary

#3F49C5 #C5783F #8CC53F

monochromatic

#20256A #2E3699 #3F49C5 #6E76D3 #9DA2E1

Accessibility & contrast

On white

7.07

#3F49C5 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.97

#3F49C5 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3F49C5

7.07:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F49C5	#FFFFFF	#000000	##FFFFFF
##3F49C5	1.00	7.07	2.97	7.07
#FFFFFF	7.07	1.00	21.00	1.00
#000000	2.97	21.00	1.00	21.00
##FFFFFF	7.07	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#005FC9

Deuteranopia (green-blind)

#0052C3

Tritanopia (blue-blind)

#006980

Achromatopsia (no color)

#585858

Design tokens & code

CSS

--color: #3f49c5;
/* rgb */ color: rgb(63, 73, 197);
/* oklch */ color: oklch(47.6% 0.190 273.2);

Tailwind

colors: {
  custom: {
    50: '#857cd8',
    500: '#3f49c5',
    950: '#000000',
  },
}

SCSS

$custom: #3f49c5;
$custom-light: #857cd8;
$custom-dark: #000000;

JSON

{
  "hex": "#3f49c5",
  "rgb": {
    "r": 63,
    "g": 73,
    "b": 197
  },
  "hsl": {
    "h": 235.522,
    "s": 53.6,
    "l": 50.98
  },
  "oklch": {
    "l": 0.47646,
    "c": 0.19042,
    "h": 273.2
  },
  "luminance": 0.09853
}

Semantic roles & 50–950 ramp

primary

#3F49C5

secondary

#CEC992

accent

#D24BDD

background

#F8F7FD

surface

#F0EEFA

border

#CBC9D3

text

#0C0915

muted

#7D7B83

Preview Lab

Preview with #3F49C5

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

Preview Lab → · Contrast checker → · Palette generator →