#3963BF#3963BF

#3963BF is a mid, vivid blue. Relative luminance 0.136; OKLCH L 51.9% C 0.152 H 263.5°. Best body text is #FFFFFF at 5.66:1 contrast (WCAG AA passes).

Color values

HEX	#3963BF
RGB	rgb(57, 99, 191)
HSL	hsl(221, 54%, 49%)
HSV	hsv(221, 70%, 75%)
CMYK	cmyk(70.2%, 48.2%, 0%, 25.1%)
CIE-LAB	lab(43.59, 16.63, -52.67)
CIE-LCH	lch(43.59, 55.23, 287.52°)
OKLab	oklab(51.94% -0.0171 -0.151)
OKLCH	oklch(51.94% 0.152 263.5)
XYZ	xyz(15.5498, 13.5535, 51.0767)
Luminance	0.1356 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3963BF #BF9539

analogous

#39A6BF #3963BF #5239BF

triadic

#3963BF #BF3963 #63BF39

tetradic

#3963BF #BF39A6 #BF9539 #39BF52

square

#3963BF #BF39A6 #BF9539 #39BF52

split-complementary

#3963BF #BF5239 #A6BF39

monochromatic

#1D3261 #2B4B90 #3963BF #6486D1 #93ABDF

Accessibility & contrast

On white

5.66

#3963BF on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.71

#3963BF on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3963BF

5.66:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3963BF	#FFFFFF	#000000	##FFFFFF
##3963BF	1.00	5.66	3.71	5.66
#FFFFFF	5.66	1.00	21.00	1.00
#000000	3.71	21.00	1.00	21.00
##FFFFFF	5.66	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#316EC2

Deuteranopia (green-blind)

#0C61BD

Tritanopia (blue-blind)

#007988

Achromatopsia (no color)

#676767

Design tokens & code

CSS

--color: #3963bf;
/* rgb */ color: rgb(57, 99, 191);
/* oklch */ color: oklch(51.9% 0.152 263.5);

Tailwind

colors: {
  custom: {
    50: '#7f8ed3',
    500: '#3963bf',
    950: '#000000',
  },
}

SCSS

$custom: #3963bf;
$custom-light: #7f8ed3;
$custom-dark: #000000;

JSON

{
  "hex": "#3963bf",
  "rgb": {
    "r": 57,
    "g": 99,
    "b": 191
  },
  "hsl": {
    "h": 221.194,
    "s": 54.032,
    "l": 48.627
  },
  "oklch": {
    "l": 0.51936,
    "c": 0.152,
    "h": 263.5
  },
  "luminance": 0.13555
}

Semantic roles & 50–950 ramp

primary

#3963BF

secondary

#CAB68A

accent

#AF4ADD

background

#F8F8FD

surface

#EFF0FA

border

#CACBD3

text

#0B0C14

muted

#7C7D83

Preview Lab

Preview with #3963BF

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

Preview Lab → · Contrast checker → · Palette generator →