#3F4FBF#3F4FBF

#3F4FBF is a mid, vivid blue. Relative luminance 0.104; OKLCH L 48.2% C 0.175 H 271.9°. Best body text is #FFFFFF at 6.81:1 contrast (WCAG AA passes).

Color values

HEX	#3F4FBF
RGB	rgb(63, 79, 191)
HSL	hsl(233, 50%, 50%)
HSV	hsv(233, 67%, 75%)
CMYK	cmyk(67%, 58.6%, 0%, 25.1%)
CIE-LAB	lab(38.57, 30.40, -60.77)
CIE-LCH	lch(38.57, 67.95, 296.57°)
OKLab	oklab(48.23% 0.0059 -0.175)
OKLCH	oklch(48.23% 0.175 271.9)
XYZ	xyz(14.2467, 10.4090, 50.5385)
Luminance	0.1041 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3F4FBF #BFAF3F

analogous

#3F8FBF #3F4FBF #6F3FBF

triadic

#3F4FBF #BF3F4F #4FBF3F

tetradic

#3F4FBF #BF3F8F #BFAF3F #3FBF6F

square

#3F4FBF #BF3F8F #BFAF3F #3FBF6F

split-complementary

#3F4FBF #BF6F3F #8FBF3F

monochromatic

#212963 #303C91 #3F4FBF #6D79CF #9BA3DE

Accessibility & contrast

On white

6.81

#3F4FBF on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.08

#3F4FBF on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3F4FBF

6.81:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F4FBF	#FFFFFF	#000000	##FFFFFF
##3F4FBF	1.00	6.81	3.08	6.81
#FFFFFF	6.81	1.00	21.00	1.00
#000000	3.08	21.00	1.00	21.00
##FFFFFF	6.81	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0061C3

Deuteranopia (green-blind)

#0055BD

Tritanopia (blue-blind)

#006B7F

Achromatopsia (no color)

#5B5B5B

Design tokens & code

CSS

--color: #3f4fbf;
/* rgb */ color: rgb(63, 79, 191);
/* oklch */ color: oklch(48.2% 0.175 271.9);

Tailwind

colors: {
  custom: {
    50: '#8380d3',
    500: '#3f4fbf',
    950: '#000000',
  },
}

SCSS

$custom: #3f4fbf;
$custom-light: #8380d3;
$custom-dark: #000000;

JSON

{
  "hex": "#3f4fbf",
  "rgb": {
    "r": 63,
    "g": 79,
    "b": 191
  },
  "hsl": {
    "h": 232.5,
    "s": 50.394,
    "l": 49.804
  },
  "oklch": {
    "l": 0.48229,
    "c": 0.17514,
    "h": 271.9
  },
  "luminance": 0.1041
}

Semantic roles & 50–950 ramp

primary

#3F4FBF

secondary

#CAC390

accent

#C84EDA

background

#F8F7FD

surface

#F0EEFA

border

#CBC9D3

text

#0C0A14

muted

#7D7C83

Preview Lab

Preview with #3F4FBF

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

Preview Lab → · Contrast checker → · Palette generator →