#3F4FC8#3F4FC8

#3F4FC8 is a mid, vivid blue. Relative luminance 0.108; OKLCH L 49.0% C 0.187 H 271.8°. Best body text is #FFFFFF at 6.64:1 contrast (WCAG AA passes).

Color values

HEX	#3F4FC8
RGB	rgb(63, 79, 200)
HSL	hsl(233, 55%, 52%)
HSV	hsv(233, 69%, 78%)
CMYK	cmyk(68.5%, 60.5%, 0%, 21.6%)
CIE-LAB	lab(39.27, 33.56, -64.86)
CIE-LCH	lch(39.27, 73.03, 297.36°)
OKLab	oklab(48.97% 0.0058 -0.1871)
OKLCH	oklch(48.97% 0.187 271.8)
XYZ	xyz(15.2677, 10.8174, 55.9157)
Luminance	0.1082 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3F4FC8 #C8B83F

analogous

#3F94C8 #3F4FC8 #743FC8

triadic

#3F4FC8 #C83F4F #4FC83F

tetradic

#3F4FC8 #C83F94 #C8B83F #3FC874

square

#3F4FC8 #C83F94 #C8B83F #3FC874

split-complementary

#3F4FC8 #C8743F #94C83F

monochromatic

#1F286D #2D3A9D #3F4FC8 #6F7BD6 #9EA6E3

Accessibility & contrast

On white

6.64

#3F4FC8 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.16

#3F4FC8 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3F4FC8

6.64:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F4FC8	#FFFFFF	#000000	##FFFFFF
##3F4FC8	1.00	6.64	3.16	6.64
#FFFFFF	6.64	1.00	21.00	1.00
#000000	3.16	21.00	1.00	21.00
##FFFFFF	6.64	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0063CC

Deuteranopia (green-blind)

#0056C6

Tritanopia (blue-blind)

#006D84

Achromatopsia (no color)

#5C5C5C

Design tokens & code

CSS

--color: #3f4fc8;
/* rgb */ color: rgb(63, 79, 200);
/* oklch */ color: oklch(49.0% 0.187 271.8);

Tailwind

colors: {
  custom: {
    50: '#8580da',
    500: '#3f4fc8',
    950: '#000000',
  },
}

SCSS

$custom: #3f4fc8;
$custom-light: #8580da;
$custom-dark: #000000;

JSON

{
  "hex": "#3f4fc8",
  "rgb": {
    "r": 63,
    "g": 79,
    "b": 200
  },
  "hsl": {
    "h": 232.993,
    "s": 55.466,
    "l": 51.569
  },
  "oklch": {
    "l": 0.48972,
    "c": 0.18716,
    "h": 271.8
  },
  "luminance": 0.10819
}

Semantic roles & 50–950 ramp

primary

#3F4FC8

secondary

#D0C893

accent

#CD49DF

background

#F8F7FD

surface

#F0EEFB

border

#CBC9D4

text

#0C0A15

muted

#7D7C83

Preview Lab

Preview with #3F4FC8

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

Preview Lab → · Contrast checker → · Palette generator →