#3963CC#3963CC

#3963CC is a mid, vivid blue. Relative luminance 0.142; OKLCH L 52.9% C 0.170 H 264.8°. Best body text is #FFFFFF at 5.48:1 contrast (WCAG AA passes).

Color values

HEX	#3963CC
RGB	rgb(57, 99, 204)
HSL	hsl(223, 59%, 51%)
HSV	hsv(223, 72%, 80%)
CMYK	cmyk(72.1%, 51.5%, 0%, 20%)
CIE-LAB	lab(44.45, 21.40, -58.78)
CIE-LCH	lch(44.45, 62.56, 290.01°)
OKLab	oklab(52.87% -0.0155 -0.169)
OKLCH	oklch(52.87% 0.17 264.8)
XYZ	xyz(17.0444, 14.1514, 58.9482)
Luminance	0.1415 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3963CC #CCA239

analogous

#39ACCC #3963CC #5839CC

triadic

#3963CC #CC3963 #63CC39

tetradic

#3963CC #CC39AC #CCA239 #39CC58

square

#3963CC #CC39AC #CCA239 #39CC58

split-complementary

#3963CC #CC5839 #ACCC39

monochromatic

#1C346E #294B9F #3963CC #6A89D9 #9AB0E5

Accessibility & contrast

On white

5.48

#3963CC on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.83

#3963CC on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3963CC

5.48:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3963CC	#FFFFFF	#000000	##FFFFFF
##3963CC	1.00	5.48	3.83	5.48
#FFFFFF	5.48	1.00	21.00	1.00
#000000	3.83	21.00	1.00	21.00
##FFFFFF	5.48	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#1F70D0

Deuteranopia (green-blind)

#0063CA

Tritanopia (blue-blind)

#007C8E

Achromatopsia (no color)

#696969

Design tokens & code

CSS

--color: #3963cc;
/* rgb */ color: rgb(57, 99, 204);
/* oklch */ color: oklch(52.9% 0.170 264.8);

Tailwind

colors: {
  custom: {
    50: '#828edc',
    500: '#3963cc',
    950: '#000000',
  },
}

SCSS

$custom: #3963cc;
$custom-light: #828edc;
$custom-dark: #000000;

JSON

{
  "hex": "#3963cc",
  "rgb": {
    "r": 57,
    "g": 99,
    "b": 204
  },
  "hsl": {
    "h": 222.857,
    "s": 59.036,
    "l": 51.176
  },
  "oklch": {
    "l": 0.5287,
    "c": 0.16974,
    "h": 264.8
  },
  "luminance": 0.14153
}

Semantic roles & 50–950 ramp

primary

#3963CC

secondary

#D1BE90

accent

#B546E2

background

#F8F8FD

surface

#F0F0FB

border

#CBCBD4

text

#0C0C15

muted

#7D7D83

Preview Lab

Preview with #3963CC

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

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