#3F46C7#3F46C7

#3F46C7 is a mid, vivid blue. Relative luminance 0.096; OKLCH L 47.3% C 0.197 H 273.7°. Best body text is #FFFFFF at 7.21:1 contrast (WCAG AA passes).

Color values

HEX	#3F46C7
RGB	rgb(63, 70, 199)
HSL	hsl(237, 55%, 51%)
HSV	hsv(237, 68%, 78%)
CMYK	cmyk(68.3%, 64.8%, 0%, 22%)
CIE-LAB	lab(37.04, 38.83, -67.93)
CIE-LCH	lch(37.04, 78.24, 299.75°)
OKLab	oklab(47.31% 0.0126 -0.1961)
OKLCH	oklch(47.31% 0.197 273.7)
XYZ	xyz(14.5454, 9.5592, 55.1003)
Luminance	0.0956 (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

#3F46C7 #C7C03F

analogous

#3F8AC7 #3F46C7 #7C3FC7

triadic

#3F46C7 #C73F46 #46C73F

tetradic

#3F46C7 #C73F8A #C7C03F #3FC77C

square

#3F46C7 #C73F8A #C7C03F #3FC77C

split-complementary

#3F46C7 #C77C3F #8AC73F

monochromatic

#20236C #2D339B #3F46C7 #6E74D5 #9EA1E3

Accessibility & contrast

On white

7.21

#3F46C7 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.91

#3F46C7 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3F46C7

7.21:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F46C7	#FFFFFF	#000000	##FFFFFF
##3F46C7	1.00	7.21	2.91	7.21
#FFFFFF	7.21	1.00	21.00	1.00
#000000	2.91	21.00	1.00	21.00
##FFFFFF	7.21	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#005DCB

Deuteranopia (green-blind)

#0051C5

Tritanopia (blue-blind)

#006880

Achromatopsia (no color)

#575757

Design tokens & code

CSS

--color: #3f46c7;
/* rgb */ color: rgb(63, 70, 199);
/* oklch */ color: oklch(47.3% 0.197 273.7);

Tailwind

colors: {
  custom: {
    50: '#857ad9',
    500: '#3f46c7',
    950: '#000000',
  },
}

SCSS

$custom: #3f46c7;
$custom-light: #857ad9;
$custom-dark: #000000;

JSON

{
  "hex": "#3f46c7",
  "rgb": {
    "r": 63,
    "g": 70,
    "b": 199
  },
  "hsl": {
    "h": 236.912,
    "s": 54.839,
    "l": 51.373
  },
  "oklch": {
    "l": 0.47306,
    "c": 0.19653,
    "h": 273.7
  },
  "luminance": 0.09561
}

Semantic roles & 50–950 ramp

primary

#3F46C7

secondary

#CFCC93

accent

#D74ADE

background

#F8F7FD

surface

#F0EDFB

border

#CBC8D4

text

#0C0915

muted

#7D7B83

Preview Lab

Preview with #3F46C7

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

Preview Lab → · Contrast checker → · Palette generator →