#3F47CA#3F47CA

#3F47CA is a mid, vivid blue. Relative luminance 0.098; OKLCH L 47.7% C 0.199 H 273.3°. Best body text is #FFFFFF at 7.08:1 contrast (WCAG AA passes).

Color values

HEX	#3F47CA
RGB	rgb(63, 71, 202)
HSL	hsl(237, 57%, 52%)
HSV	hsv(237, 69%, 79%)
CMYK	cmyk(68.8%, 64.9%, 0%, 20.8%)
CIE-LAB	lab(37.53, 39.24, -68.87)
CIE-LCH	lch(37.53, 79.27, 299.67°)
OKLab	oklab(47.74% 0.0116 -0.1989)
OKLCH	oklch(47.74% 0.199 273.3)
XYZ	xyz(14.9602, 9.8261, 56.9739)
Luminance	0.0983 (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

#3F47CA #CAC23F

analogous

#3F8DCA #3F47CA #7D3FCA

triadic

#3F47CA #CA3F47 #47CA3F

tetradic

#3F47CA #CA3F8D #CAC23F #3FCA7D

square

#3F47CA #CA3F8D #CAC23F #3FCA7D

split-complementary

#3F47CA #CA7D3F #8DCA3F

monochromatic

#1F2470 #2C33A0 #3F47CA #6F75D7 #9FA3E4

Accessibility & contrast

On white

7.08

#3F47CA on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.97

#3F47CA on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3F47CA

7.08:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F47CA	#FFFFFF	#000000	##FFFFFF
##3F47CA	1.00	7.08	2.97	7.08
#FFFFFF	7.08	1.00	21.00	1.00
#000000	2.97	21.00	1.00	21.00
##FFFFFF	7.08	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#005FCE

Deuteranopia (green-blind)

#0052C8

Tritanopia (blue-blind)

#006982

Achromatopsia (no color)

#585858

Design tokens & code

CSS

--color: #3f47ca;
/* rgb */ color: rgb(63, 71, 202);
/* oklch */ color: oklch(47.7% 0.199 273.3);

Tailwind

colors: {
  custom: {
    50: '#867adb',
    500: '#3f47ca',
    950: '#000000',
  },
}

SCSS

$custom: #3f47ca;
$custom-light: #867adb;
$custom-dark: #000000;

JSON

{
  "hex": "#3f47ca",
  "rgb": {
    "r": 63,
    "g": 71,
    "b": 202
  },
  "hsl": {
    "h": 236.547,
    "s": 56.735,
    "l": 51.961
  },
  "oklch": {
    "l": 0.47742,
    "c": 0.19922,
    "h": 273.3
  },
  "luminance": 0.09828
}

Semantic roles & 50–950 ramp

primary

#3F47CA

secondary

#D1CD94

accent

#D748E0

background

#F8F7FD

surface

#F0EDFB

border

#CBC8D4

text

#0D0915

muted

#7D7B83

Preview Lab

Preview with #3F47CA

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

Preview Lab → · Contrast checker → · Palette generator →