#3963BC#3963BC

#3963BC is a mid, vivid blue. Relative luminance 0.134; OKLCH L 51.7% C 0.148 H 263.2°. Best body text is #FFFFFF at 5.70:1 contrast (WCAG AA passes).

Color values

HEX	#3963BC
RGB	rgb(57, 99, 188)
HSL	hsl(221, 53%, 48%)
HSV	hsv(221, 70%, 74%)
CMYK	cmyk(69.7%, 47.3%, 0%, 26.3%)
CIE-LAB	lab(43.39, 15.53, -51.23)
CIE-LCH	lch(43.39, 53.53, 286.86°)
OKLab	oklab(51.73% -0.0175 -0.1468)
OKLCH	oklch(51.73% 0.148 263.2)
XYZ	xyz(15.2231, 13.4228, 49.3558)
Luminance	0.1342 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3963BC #BC9239

analogous

#39A4BC #3963BC #5039BC

triadic

#3963BC #BC3963 #63BC39

tetradic

#3963BC #BC39A4 #BC9239 #39BC50

square

#3963BC #BC39A4 #BC9239 #39BC50

split-complementary

#3963BC #BC5039 #A4BC39

monochromatic

#1D325E #2B4A8D #3963BC #6386D0 #92AADE

Accessibility & contrast

On white

5.70

#3963BC on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.68

#3963BC on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3963BC

5.70:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3963BC	#FFFFFF	#000000	##FFFFFF
##3963BC	1.00	5.70	3.68	5.70
#FFFFFF	5.70	1.00	21.00	1.00
#000000	3.68	21.00	1.00	21.00
##FFFFFF	5.70	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#346DBF

Deuteranopia (green-blind)

#1661BA

Tritanopia (blue-blind)

#007886

Achromatopsia (no color)

#666666

Design tokens & code

CSS

--color: #3963bc;
/* rgb */ color: rgb(57, 99, 188);
/* oklch */ color: oklch(51.7% 0.148 263.2);

Tailwind

colors: {
  custom: {
    50: '#7f8ed1',
    500: '#3963bc',
    950: '#000000',
  },
}

SCSS

$custom: #3963bc;
$custom-light: #7f8ed1;
$custom-dark: #000000;

JSON

{
  "hex": "#3963bc",
  "rgb": {
    "r": 57,
    "g": 99,
    "b": 188
  },
  "hsl": {
    "h": 220.763,
    "s": 53.469,
    "l": 48.039
  },
  "oklch": {
    "l": 0.51727,
    "c": 0.14786,
    "h": 263.2
  },
  "luminance": 0.13424
}

Semantic roles & 50–950 ramp

primary

#3963BC

secondary

#C9B488

accent

#AE4BDD

background

#F8F8FC

surface

#EFF0F9

border

#CACBD2

text

#0B0C14

muted

#7C7D82

Preview Lab

Preview with #3963BC

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

Preview Lab → · Contrast checker → · Palette generator →