#3963B5#3963B5

#3963B5 is a mid, vivid blue. Relative luminance 0.131; OKLCH L 51.2% C 0.138 H 262.2°. Best body text is #FFFFFF at 5.79:1 contrast (WCAG AA passes).

Color values

HEX	#3963B5
RGB	rgb(57, 99, 181)
HSL	hsl(220, 52%, 47%)
HSV	hsv(220, 69%, 71%)
CMYK	cmyk(68.5%, 45.3%, 0%, 29%)
CIE-LAB	lab(42.96, 12.96, -47.85)
CIE-LCH	lch(42.96, 49.58, 285.16°)
OKLab	oklab(51.25% -0.0186 -0.1369)
OKLCH	oklch(51.25% 0.138 262.2)
XYZ	xyz(14.4867, 13.1283, 45.4777)
Luminance	0.1313 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3963B5 #B58B39

analogous

#39A1B5 #3963B5 #4D39B5

triadic

#3963B5 #B53963 #63B539

tetradic

#3963B5 #B539A1 #B58B39 #39B54D

square

#3963B5 #B539A1 #B58B39 #39B54D

split-complementary

#3963B5 #B54D39 #A1B539

monochromatic

#1C3058 #2A4A86 #3963B5 #5F84CD #8DA8DB

Accessibility & contrast

On white

5.79

#3963B5 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.63

#3963B5 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3963B5

5.79:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3963B5	#FFFFFF	#000000	##FFFFFF
##3963B5	1.00	5.79	3.63	5.79
#FFFFFF	5.79	1.00	21.00	1.00
#000000	3.63	21.00	1.00	21.00
##FFFFFF	5.79	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#3A6CB8

Deuteranopia (green-blind)

#2360B3

Tritanopia (blue-blind)

#007683

Achromatopsia (no color)

#656565

Design tokens & code

CSS

--color: #3963b5;
/* rgb */ color: rgb(57, 99, 181);
/* oklch */ color: oklch(51.2% 0.138 262.2);

Tailwind

colors: {
  custom: {
    50: '#7d8ecc',
    500: '#3963b5',
    950: '#000000',
  },
}

SCSS

$custom: #3963b5;
$custom-light: #7d8ecc;
$custom-dark: #000000;

JSON

{
  "hex": "#3963b5",
  "rgb": {
    "r": 57,
    "g": 99,
    "b": 181
  },
  "hsl": {
    "h": 219.677,
    "s": 52.101,
    "l": 46.667
  },
  "oklch": {
    "l": 0.5125,
    "c": 0.13814,
    "h": 262.2
  },
  "luminance": 0.1313
}

Semantic roles & 50–950 ramp

primary

#3963B5

secondary

#C6B084

accent

#AB4CDC

background

#F8F8FC

surface

#EFF0F9

border

#CACBD2

text

#0B0C13

muted

#7C7D82

Preview Lab

Preview with #3963B5

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

Preview Lab → · Contrast checker → · Palette generator →