#3F47C9#3F47C9

#3F47C9 is a mid, vivid blue. Relative luminance 0.098; OKLCH L 47.7% C 0.198 H 273.4°. Best body text is #FFFFFF at 7.10:1 contrast (WCAG AA passes).

Color values

HEX	#3F47C9
RGB	rgb(63, 71, 201)
HSL	hsl(237, 56%, 52%)
HSV	hsv(237, 69%, 79%)
CMYK	cmyk(68.7%, 64.7%, 0%, 21.2%)
CIE-LAB	lab(37.44, 38.89, -68.43)
CIE-LCH	lch(37.44, 78.71, 299.61°)
OKLab	oklab(47.65% 0.0117 -0.1976)
OKLCH	oklch(47.65% 0.198 273.4)
XYZ	xyz(14.8422, 9.7789, 56.3523)
Luminance	0.0978 (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

#3F47C9 #C9C13F

analogous

#3F8CC9 #3F47C9 #7C3FC9

triadic

#3F47C9 #C93F47 #47C93F

tetradic

#3F47C9 #C93F8C #C9C13F #3FC97C

square

#3F47C9 #C93F8C #C9C13F #3FC97C

split-complementary

#3F47C9 #C97C3F #8CC93F

monochromatic

#1F246F #2D339E #3F47C9 #6F75D6 #9FA3E4

Accessibility & contrast

On white

7.10

#3F47C9 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.96

#3F47C9 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3F47C9

7.10:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F47C9	#FFFFFF	#000000	##FFFFFF
##3F47C9	1.00	7.10	2.96	7.10
#FFFFFF	7.10	1.00	21.00	1.00
#000000	2.96	21.00	1.00	21.00
##FFFFFF	7.10	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#005FCD

Deuteranopia (green-blind)

#0052C7

Tritanopia (blue-blind)

#006981

Achromatopsia (no color)

#585858

Design tokens & code

CSS

--color: #3f47c9;
/* rgb */ color: rgb(63, 71, 201);
/* oklch */ color: oklch(47.7% 0.198 273.4);

Tailwind

colors: {
  custom: {
    50: '#867ada',
    500: '#3f47c9',
    950: '#000000',
  },
}

SCSS

$custom: #3f47c9;
$custom-light: #867ada;
$custom-dark: #000000;

JSON

{
  "hex": "#3f47c9",
  "rgb": {
    "r": 63,
    "g": 71,
    "b": 201
  },
  "hsl": {
    "h": 236.522,
    "s": 56.098,
    "l": 51.765
  },
  "oklch": {
    "l": 0.47653,
    "c": 0.19795,
    "h": 273.4
  },
  "luminance": 0.0978
}

Semantic roles & 50–950 ramp

primary

#3F47C9

secondary

#D0CD94

accent

#D748DF

background

#F8F7FD

surface

#F0EDFB

border

#CBC8D4

text

#0D0915

muted

#7D7B83

Preview Lab

Preview with #3F47C9

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

Preview Lab → · Contrast checker → · Palette generator →