#3F4FC9#3F4FC9

#3F4FC9 is a mid, vivid blue. Relative luminance 0.109; OKLCH L 49.1% C 0.188 H 271.8°. Best body text is #FFFFFF at 6.62:1 contrast (WCAG AA passes).

Color values

HEX	#3F4FC9
RGB	rgb(63, 79, 201)
HSL	hsl(233, 56%, 52%)
HSV	hsv(233, 69%, 79%)
CMYK	cmyk(68.7%, 60.7%, 0%, 21.2%)
CIE-LAB	lab(39.35, 33.91, -65.31)
CIE-LCH	lch(39.35, 73.59, 297.44°)
OKLab	oklab(49.06% 0.0058 -0.1884)
OKLCH	oklch(49.06% 0.188 271.8)
XYZ	xyz(15.3849, 10.8643, 56.5332)
Luminance	0.1087 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3F4FC9 #C9B93F

analogous

#3F94C9 #3F4FC9 #743FC9

triadic

#3F4FC9 #C93F4F #4FC93F

tetradic

#3F4FC9 #C93F94 #C9B93F #3FC974

square

#3F4FC9 #C93F94 #C9B93F #3FC974

split-complementary

#3F4FC9 #C9743F #94C93F

monochromatic

#1F286F #2D3A9E #3F4FC9 #6F7BD6 #9FA7E4

Accessibility & contrast

On white

6.62

#3F4FC9 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.17

#3F4FC9 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3F4FC9

6.62:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F4FC9	#FFFFFF	#000000	##FFFFFF
##3F4FC9	1.00	6.62	3.17	6.62
#FFFFFF	6.62	1.00	21.00	1.00
#000000	3.17	21.00	1.00	21.00
##FFFFFF	6.62	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0063CD

Deuteranopia (green-blind)

#0057C7

Tritanopia (blue-blind)

#006E84

Achromatopsia (no color)

#5D5D5D

Design tokens & code

CSS

--color: #3f4fc9;
/* rgb */ color: rgb(63, 79, 201);
/* oklch */ color: oklch(49.1% 0.188 271.8);

Tailwind

colors: {
  custom: {
    50: '#8580da',
    500: '#3f4fc9',
    950: '#000000',
  },
}

SCSS

$custom: #3f4fc9;
$custom-light: #8580da;
$custom-dark: #000000;

JSON

{
  "hex": "#3f4fc9",
  "rgb": {
    "r": 63,
    "g": 79,
    "b": 201
  },
  "hsl": {
    "h": 233.043,
    "s": 56.098,
    "l": 51.765
  },
  "oklch": {
    "l": 0.49056,
    "c": 0.18848,
    "h": 271.8
  },
  "luminance": 0.10866
}

Semantic roles & 50–950 ramp

primary

#3F4FC9

secondary

#D0C994

accent

#CE48DF

background

#F8F7FD

surface

#F0EEFB

border

#CBC9D4

text

#0C0A15

muted

#7D7C83

Preview Lab

Preview with #3F4FC9

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

Preview Lab → · Contrast checker → · Palette generator →