#3864CB#3864CB

#3864CB is a mid, vivid blue. Relative luminance 0.143; OKLCH L 53.0% C 0.167 H 264.1°. Best body text is #FFFFFF at 5.45:1 contrast (WCAG AA passes).

Color values

HEX	#3864CB
RGB	rgb(56, 100, 203)
HSL	hsl(222, 59%, 51%)
HSV	hsv(222, 72%, 80%)
CMYK	cmyk(72.4%, 50.7%, 0%, 20.4%)
CIE-LAB	lab(44.61, 20.26, -57.95)
CIE-LCH	lch(44.61, 61.39, 289.27°)
OKLab	oklab(52.96% -0.0172 -0.1666)
OKLCH	oklch(52.96% 0.167 264.1)
XYZ	xyz(16.9637, 14.2651, 58.3477)
Luminance	0.1427 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3864CB #CB9F38

analogous

#38ADCB #3864CB #5538CB

triadic

#3864CB #CB3864 #64CB38

tetradic

#3864CB #CB38AD #CB9F38 #38CB55

square

#3864CB #CB38AD #CB9F38 #38CB55

split-complementary

#3864CB #CB5538 #ADCB38

monochromatic

#1C346C #294C9D #3864CB #698AD8 #99B0E4

Accessibility & contrast

On white

5.45

#3864CB on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.85

#3864CB on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3864CB

5.45:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3864CB	#FFFFFF	#000000	##FFFFFF
##3864CB	1.00	5.45	3.85	5.45
#FFFFFF	5.45	1.00	21.00	1.00
#000000	3.85	21.00	1.00	21.00
##FFFFFF	5.45	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#2471CF

Deuteranopia (green-blind)

#0063C9

Tritanopia (blue-blind)

#007D8E

Achromatopsia (no color)

#696969

Design tokens & code

CSS

--color: #3864cb;
/* rgb */ color: rgb(56, 100, 203);
/* oklch */ color: oklch(53.0% 0.167 264.1);

Tailwind

colors: {
  custom: {
    50: '#818fdb',
    500: '#3864cb',
    950: '#000000',
  },
}

SCSS

$custom: #3864cb;
$custom-light: #818fdb;
$custom-dark: #000000;

JSON

{
  "hex": "#3864cb",
  "rgb": {
    "r": 56,
    "g": 100,
    "b": 203
  },
  "hsl": {
    "h": 222.041,
    "s": 58.566,
    "l": 50.784
  },
  "oklch": {
    "l": 0.5296,
    "c": 0.16747,
    "h": 264.1
  },
  "luminance": 0.14267
}

Semantic roles & 50–950 ramp

primary

#3864CB

secondary

#D0BC8F

accent

#B346E2

background

#F8F8FD

surface

#F0F0FB

border

#CBCBD4

text

#0C0C15

muted

#7D7D83

Preview Lab

Preview with #3864CB

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

Preview Lab → · Contrast checker → · Palette generator →