#3963BB#3963BB

#3963BB is a mid, vivid blue. Relative luminance 0.134; OKLCH L 51.7% C 0.146 H 263.1°. Best body text is #FFFFFF at 5.71:1 contrast (WCAG AA passes).

Color values

HEX	#3963BB
RGB	rgb(57, 99, 187)
HSL	hsl(221, 53%, 48%)
HSV	hsv(221, 70%, 73%)
CMYK	cmyk(69.5%, 47.1%, 0%, 26.7%)
CIE-LAB	lab(43.33, 15.16, -50.75)
CIE-LCH	lch(43.33, 52.97, 286.63°)
OKLab	oklab(51.66% -0.0177 -0.1454)
OKLCH	oklch(51.66% 0.146 263.1)
XYZ	xyz(15.1157, 13.3799, 48.7900)
Luminance	0.1338 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3963BB #BB9139

analogous

#39A4BB #3963BB #5039BB

triadic

#3963BB #BB3963 #63BB39

tetradic

#3963BB #BB39A4 #BB9139 #39BB50

square

#3963BB #BB39A4 #BB9139 #39BB50

split-complementary

#3963BB #BB5039 #A4BB39

monochromatic

#1C315D #2B4A8C #3963BB #6285CF #91AADD

Accessibility & contrast

On white

5.71

#3963BB on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.68

#3963BB on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3963BB

5.71:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3963BB	#FFFFFF	#000000	##FFFFFF
##3963BB	1.00	5.71	3.68	5.71
#FFFFFF	5.71	1.00	21.00	1.00
#000000	3.68	21.00	1.00	21.00
##FFFFFF	5.71	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#356DBE

Deuteranopia (green-blind)

#1861B9

Tritanopia (blue-blind)

#007886

Achromatopsia (no color)

#666666

Design tokens & code

CSS

--color: #3963bb;
/* rgb */ color: rgb(57, 99, 187);
/* oklch */ color: oklch(51.7% 0.146 263.1);

Tailwind

colors: {
  custom: {
    50: '#7f8ed0',
    500: '#3963bb',
    950: '#000000',
  },
}

SCSS

$custom: #3963bb;
$custom-light: #7f8ed0;
$custom-dark: #000000;

JSON

{
  "hex": "#3963bb",
  "rgb": {
    "r": 57,
    "g": 99,
    "b": 187
  },
  "hsl": {
    "h": 220.615,
    "s": 53.279,
    "l": 47.843
  },
  "oklch": {
    "l": 0.51658,
    "c": 0.14648,
    "h": 263.1
  },
  "luminance": 0.13381
}

Semantic roles & 50–950 ramp

primary

#3963BB

secondary

#C8B387

accent

#AE4BDD

background

#F8F8FC

surface

#EFF0F9

border

#CACBD2

text

#0B0C14

muted

#7C7D82

Preview Lab

Preview with #3963BB

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

Preview Lab → · Contrast checker → · Palette generator →