#3664BC#3664BC

#3664BC is a mid, vivid blue. Relative luminance 0.135; OKLCH L 51.8% C 0.148 H 261.9°. Best body text is #FFFFFF at 5.67:1 contrast (WCAG AA passes).

Color values

HEX	#3664BC
RGB	rgb(54, 100, 188)
HSL	hsl(219, 55%, 47%)
HSV	hsv(219, 71%, 74%)
CMYK	cmyk(71.3%, 46.8%, 0%, 26.3%)
CIE-LAB	lab(43.55, 14.44, -50.99)
CIE-LCH	lch(43.55, 53.00, 285.81°)
OKLab	oklab(51.81% -0.0208 -0.1461)
OKLCH	oklch(51.81% 0.148 261.9)
XYZ	xyz(15.1524, 13.5279, 49.3798)
Luminance	0.1353 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3664BC #BC8E36

analogous

#36A7BC #3664BC #4B36BC

triadic

#3664BC #BC3664 #64BC36

tetradic

#3664BC #BC36A7 #BC8E36 #36BC4B

square

#3664BC #BC36A7 #BC8E36 #36BC4B

split-complementary

#3664BC #BC4B36 #A7BC36

monochromatic

#1B315D #284B8C #3664BC #5E86D1 #8EAADF

Accessibility & contrast

On white

5.67

#3664BC on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.71

#3664BC on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3664BC

5.67:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3664BC	#FFFFFF	#000000	##FFFFFF
##3664BC	1.00	5.67	3.71	5.67
#FFFFFF	5.67	1.00	21.00	1.00
#000000	3.71	21.00	1.00	21.00
##FFFFFF	5.67	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#366DBF

Deuteranopia (green-blind)

#1761BA

Tritanopia (blue-blind)

#007987

Achromatopsia (no color)

#676767

Design tokens & code

CSS

--color: #3664bc;
/* rgb */ color: rgb(54, 100, 188);
/* oklch */ color: oklch(51.8% 0.148 261.9);

Tailwind

colors: {
  custom: {
    50: '#7d8fd1',
    500: '#3664bc',
    950: '#000000',
  },
}

SCSS

$custom: #3664bc;
$custom-light: #7d8fd1;
$custom-dark: #000000;

JSON

{
  "hex": "#3664bc",
  "rgb": {
    "r": 54,
    "g": 100,
    "b": 188
  },
  "hsl": {
    "h": 219.403,
    "s": 55.372,
    "l": 47.451
  },
  "oklch": {
    "l": 0.51811,
    "c": 0.14762,
    "h": 261.9
  },
  "luminance": 0.13529
}

Semantic roles & 50–950 ramp

primary

#3664BC

secondary

#C9B285

accent

#AB49DF

background

#F8F8FC

surface

#EFF0F9

border

#CACBD2

text

#0B0C14

muted

#7C7D82

Preview Lab

Preview with #3664BC

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

Preview Lab → · Contrast checker → · Palette generator →