#3963BE#3963BE

#3963BE is a mid, vivid blue. Relative luminance 0.135; OKLCH L 51.9% C 0.151 H 263.4°. Best body text is #FFFFFF at 5.67:1 contrast (WCAG AA passes).

Color values

HEX	#3963BE
RGB	rgb(57, 99, 190)
HSL	hsl(221, 54%, 48%)
HSV	hsv(221, 70%, 75%)
CMYK	cmyk(70%, 47.9%, 0%, 25.5%)
CIE-LAB	lab(43.52, 16.26, -52.19)
CIE-LCH	lch(43.52, 54.66, 287.31°)
OKLab	oklab(51.87% -0.0172 -0.1496)
OKLCH	oklch(51.87% 0.151 263.4)
XYZ	xyz(15.4402, 13.5097, 50.4991)
Luminance	0.1351 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3963BE #BE9439

analogous

#39A5BE #3963BE #5239BE

triadic

#3963BE #BE3963 #63BE39

tetradic

#3963BE #BE39A5 #BE9439 #39BE52

square

#3963BE #BE39A5 #BE9439 #39BE52

split-complementary

#3963BE #BE5239 #A5BE39

monochromatic

#1D3260 #2B4A8F #3963BE #6486D0 #93ABDF

Accessibility & contrast

On white

5.67

#3963BE on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.70

#3963BE on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3963BE

5.67:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3963BE	#FFFFFF	#000000	##FFFFFF
##3963BE	1.00	5.67	3.70	5.67
#FFFFFF	5.67	1.00	21.00	1.00
#000000	3.70	21.00	1.00	21.00
##FFFFFF	5.67	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#326DC1

Deuteranopia (green-blind)

#1061BC

Tritanopia (blue-blind)

#007887

Achromatopsia (no color)

#676767

Design tokens & code

CSS

--color: #3963be;
/* rgb */ color: rgb(57, 99, 190);
/* oklch */ color: oklch(51.9% 0.151 263.4);

Tailwind

colors: {
  custom: {
    50: '#7f8ed2',
    500: '#3963be',
    950: '#000000',
  },
}

SCSS

$custom: #3963be;
$custom-light: #7f8ed2;
$custom-dark: #000000;

JSON

{
  "hex": "#3963be",
  "rgb": {
    "r": 57,
    "g": 99,
    "b": 190
  },
  "hsl": {
    "h": 221.053,
    "s": 53.846,
    "l": 48.431
  },
  "oklch": {
    "l": 0.51866,
    "c": 0.15062,
    "h": 263.4
  },
  "luminance": 0.13511
}

Semantic roles & 50–950 ramp

primary

#3963BE

secondary

#CAB589

accent

#AF4BDD

background

#F8F8FD

surface

#EFF0FA

border

#CACBD3

text

#0B0C14

muted

#7C7D83

Preview Lab

Preview with #3963BE

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

Preview Lab → · Contrast checker → · Palette generator →