#3F4FBC#3F4FBC

#3F4FBC is a mid, vivid blue. Relative luminance 0.103; OKLCH L 48.0% C 0.171 H 272.0°. Best body text is #FFFFFF at 6.87:1 contrast (WCAG AA passes).

Color values

HEX	#3F4FBC
RGB	rgb(63, 79, 188)
HSL	hsl(232, 50%, 49%)
HSV	hsv(232, 66%, 74%)
CMYK	cmyk(66.5%, 58%, 0%, 26.3%)
CIE-LAB	lab(38.34, 29.34, -59.39)
CIE-LCH	lch(38.34, 66.24, 296.29°)
OKLab	oklab(47.99% 0.0059 -0.171)
OKLCH	oklch(47.99% 0.171 272)
XYZ	xyz(13.9199, 10.2783, 48.8175)
Luminance	0.1028 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3F4FBC #BCAC3F

analogous

#3F8EBC #3F4FBC #6E3FBC

triadic

#3F4FBC #BC3F4F #4FBC3F

tetradic

#3F4FBC #BC3F8E #BCAC3F #3FBC6E

square

#3F4FBC #BC3F8E #BCAC3F #3FBC6E

split-complementary

#3F4FBC #BC6E3F #8EBC3F

monochromatic

#202860 #303C8E #3F4FBC #6B77CD #99A1DD

Accessibility & contrast

On white

6.87

#3F4FBC on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.06

#3F4FBC on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3F4FBC

6.87:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F4FBC	#FFFFFF	#000000	##FFFFFF
##3F4FBC	1.00	6.87	3.06	6.87
#FFFFFF	6.87	1.00	21.00	1.00
#000000	3.06	21.00	1.00	21.00
##FFFFFF	6.87	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0060C0

Deuteranopia (green-blind)

#0055BA

Tritanopia (blue-blind)

#006A7E

Achromatopsia (no color)

#5A5A5A

Design tokens & code

CSS

--color: #3f4fbc;
/* rgb */ color: rgb(63, 79, 188);
/* oklch */ color: oklch(48.0% 0.171 272.0);

Tailwind

colors: {
  custom: {
    50: '#8280d1',
    500: '#3f4fbc',
    950: '#000000',
  },
}

SCSS

$custom: #3f4fbc;
$custom-light: #8280d1;
$custom-dark: #000000;

JSON

{
  "hex": "#3f4fbc",
  "rgb": {
    "r": 63,
    "g": 79,
    "b": 188
  },
  "hsl": {
    "h": 232.32,
    "s": 49.801,
    "l": 49.216
  },
  "oklch": {
    "l": 0.47986,
    "c": 0.17108,
    "h": 272
  },
  "luminance": 0.1028
}

Semantic roles & 50–950 ramp

primary

#3F4FBC

secondary

#C9C18E

accent

#C84ED9

background

#F8F7FC

surface

#F0EEF9

border

#CBC9D2

text

#0C0A14

muted

#7D7C82

Preview Lab

Preview with #3F4FBC

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

Preview Lab → · Contrast checker → · Palette generator →