#3663BF#3663BF

#3663BF is a mid, vivid blue. Relative luminance 0.135; OKLCH L 51.8% C 0.153 H 262.7°. Best body text is #FFFFFF at 5.68:1 contrast (WCAG AA passes).

Color values

HEX	#3663BF
RGB	rgb(54, 99, 191)
HSL	hsl(220, 56%, 48%)
HSV	hsv(220, 72%, 75%)
CMYK	cmyk(71.7%, 48.2%, 0%, 25.1%)
CIE-LAB	lab(43.46, 16.19, -52.87)
CIE-LCH	lch(43.46, 55.30, 287.03°)
OKLab	oklab(51.81% -0.0195 -0.1517)
OKLCH	oklch(51.81% 0.153 262.7)
XYZ	xyz(15.3838, 13.4679, 51.0689)
Luminance	0.1347 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3663BF #BF9236

analogous

#36A7BF #3663BF #4E36BF

triadic

#3663BF #BF3663 #63BF36

tetradic

#3663BF #BF36A7 #BF9236 #36BF4E

square

#3663BF #BF36A7 #BF9236 #36BF4E

split-complementary

#3663BF #BF4E36 #A7BF36

monochromatic

#1B3260 #294A8F #3663BF #6086D2 #90AAE0

Accessibility & contrast

On white

5.68

#3663BF on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.69

#3663BF on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3663BF

5.68:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3663BF	#FFFFFF	#000000	##FFFFFF
##3663BF	1.00	5.68	3.69	5.68
#FFFFFF	5.68	1.00	21.00	1.00
#000000	3.69	21.00	1.00	21.00
##FFFFFF	5.68	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#316DC2

Deuteranopia (green-blind)

#0761BD

Tritanopia (blue-blind)

#007988

Achromatopsia (no color)

#676767

Design tokens & code

CSS

--color: #3663bf;
/* rgb */ color: rgb(54, 99, 191);
/* oklch */ color: oklch(51.8% 0.153 262.7);

Tailwind

colors: {
  custom: {
    50: '#7e8ed3',
    500: '#3663bf',
    950: '#000000',
  },
}

SCSS

$custom: #3663bf;
$custom-light: #7e8ed3;
$custom-dark: #000000;

JSON

{
  "hex": "#3663bf",
  "rgb": {
    "r": 54,
    "g": 99,
    "b": 191
  },
  "hsl": {
    "h": 220.292,
    "s": 55.918,
    "l": 48.039
  },
  "oklch": {
    "l": 0.51805,
    "c": 0.15295,
    "h": 262.7
  },
  "luminance": 0.1347
}

Semantic roles & 50–950 ramp

primary

#3663BF

secondary

#CAB487

accent

#AE49DF

background

#F8F8FD

surface

#EFF0FA

border

#CACBD3

text

#0B0C14

muted

#7C7D83

Preview Lab

Preview with #3663BF

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

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