#3963C7#3963C7

#3963C7 is a mid, vivid blue. Relative luminance 0.139; OKLCH L 52.5% C 0.163 H 264.4°. Best body text is #FFFFFF at 5.55:1 contrast (WCAG AA passes).

Color values

HEX	#3963C7
RGB	rgb(57, 99, 199)
HSL	hsl(222, 56%, 50%)
HSV	hsv(222, 71%, 78%)
CMYK	cmyk(71.4%, 50.3%, 0%, 22%)
CIE-LAB	lab(44.11, 19.57, -56.45)
CIE-LCH	lch(44.11, 59.74, 289.12°)
OKLab	oklab(52.51% -0.016 -0.1622)
OKLCH	oklch(52.51% 0.163 264.4)
XYZ	xyz(16.4543, 13.9153, 55.8405)
Luminance	0.1392 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3963C7 #C79D39

analogous

#39AAC7 #3963C7 #5639C7

triadic

#3963C7 #C73963 #63C739

tetradic

#3963C7 #C739AA #C79D39 #39C756

square

#3963C7 #C739AA #C79D39 #39C756

split-complementary

#3963C7 #C75639 #AAC739

monochromatic

#1D3468 #2B4B98 #3963C7 #6989D4 #98AEE2

Accessibility & contrast

On white

5.55

#3963C7 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.78

#3963C7 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3963C7

5.55:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3963C7	#FFFFFF	#000000	##FFFFFF
##3963C7	1.00	5.55	3.78	5.55
#FFFFFF	5.55	1.00	21.00	1.00
#000000	3.78	21.00	1.00	21.00
##FFFFFF	5.55	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#276FCB

Deuteranopia (green-blind)

#0062C5

Tritanopia (blue-blind)

#007B8B

Achromatopsia (no color)

#686868

Design tokens & code

CSS

--color: #3963c7;
/* rgb */ color: rgb(57, 99, 199);
/* oklch */ color: oklch(52.5% 0.163 264.4);

Tailwind

colors: {
  custom: {
    50: '#818ed9',
    500: '#3963c7',
    950: '#000000',
  },
}

SCSS

$custom: #3963c7;
$custom-light: #818ed9;
$custom-dark: #000000;

JSON

{
  "hex": "#3963c7",
  "rgb": {
    "r": 57,
    "g": 99,
    "b": 199
  },
  "hsl": {
    "h": 222.254,
    "s": 55.906,
    "l": 50.196
  },
  "oklch": {
    "l": 0.52505,
    "c": 0.16296,
    "h": 264.4
  },
  "luminance": 0.13917
}

Semantic roles & 50–950 ramp

primary

#3963C7

secondary

#CEBB8E

accent

#B349DF

background

#F8F8FD

surface

#F0F0FA

border

#CBCBD3

text

#0C0C15

muted

#7D7D83

Preview Lab

Preview with #3963C7

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

Preview Lab → · Contrast checker → · Palette generator →