#3963C9#3963C9

#3963C9 is a mid, vivid blue. Relative luminance 0.140; OKLCH L 52.6% C 0.166 H 264.5°. Best body text is #FFFFFF at 5.52:1 contrast (WCAG AA passes).

Color values

HEX	#3963C9
RGB	rgb(57, 99, 201)
HSL	hsl(223, 57%, 51%)
HSV	hsv(223, 72%, 79%)
CMYK	cmyk(71.6%, 50.7%, 0%, 21.2%)
CIE-LAB	lab(44.25, 20.30, -57.38)
CIE-LCH	lch(44.25, 60.87, 289.48°)
OKLab	oklab(52.65% -0.0158 -0.1649)
OKLCH	oklch(52.65% 0.166 264.5)
XYZ	xyz(16.6881, 14.0088, 57.0715)
Luminance	0.1401 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3963C9 #C99F39

analogous

#39ABC9 #3963C9 #5739C9

triadic

#3963C9 #C93963 #63C939

tetradic

#3963C9 #C939AB #C99F39 #39C957

square

#3963C9 #C939AB #C99F39 #39C957

split-complementary

#3963C9 #C95739 #ABC939

monochromatic

#1D346B #2A4B9B #3963C9 #6989D6 #99AFE3

Accessibility & contrast

On white

5.52

#3963C9 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.80

#3963C9 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3963C9

5.52:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3963C9	#FFFFFF	#000000	##FFFFFF
##3963C9	1.00	5.52	3.80	5.52
#FFFFFF	5.52	1.00	21.00	1.00
#000000	3.80	21.00	1.00	21.00
##FFFFFF	5.52	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#2470CD

Deuteranopia (green-blind)

#0062C7

Tritanopia (blue-blind)

#007B8C

Achromatopsia (no color)

#696969

Design tokens & code

CSS

--color: #3963c9;
/* rgb */ color: rgb(57, 99, 201);
/* oklch */ color: oklch(52.6% 0.166 264.5);

Tailwind

colors: {
  custom: {
    50: '#818eda',
    500: '#3963c9',
    950: '#000000',
  },
}

SCSS

$custom: #3963c9;
$custom-light: #818eda;
$custom-dark: #000000;

JSON

{
  "hex": "#3963c9",
  "rgb": {
    "r": 57,
    "g": 99,
    "b": 201
  },
  "hsl": {
    "h": 222.5,
    "s": 57.143,
    "l": 50.588
  },
  "oklch": {
    "l": 0.5265,
    "c": 0.16568,
    "h": 264.5
  },
  "luminance": 0.14011
}

Semantic roles & 50–950 ramp

primary

#3963C9

secondary

#CFBC8F

accent

#B447E0

background

#F8F8FD

surface

#F0F0FB

border

#CBCBD4

text

#0C0C15

muted

#7D7D83

Preview Lab

Preview with #3963C9

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

Preview Lab → · Contrast checker → · Palette generator →