#3663AD#3663AD

#3663AD is a mid, vivid blue. Relative luminance 0.127; OKLCH L 50.6% C 0.128 H 259.8°. Best body text is #FFFFFF at 5.92:1 contrast (WCAG AA passes).

Color values

HEX	#3663AD
RGB	rgb(54, 99, 173)
HSL	hsl(217, 52%, 45%)
HSV	hsv(217, 69%, 68%)
CMYK	cmyk(68.8%, 42.8%, 0%, 32.2%)
CIE-LAB	lab(42.34, 9.54, -44.15)
CIE-LCH	lch(42.34, 45.17, 282.20°)
OKLab	oklab(50.59% -0.0226 -0.126)
OKLCH	oklch(50.59% 0.128 259.8)
XYZ	xyz(13.5233, 12.7237, 41.2703)
Luminance	0.1273 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3663AD #AD8036

analogous

#369FAD #3663AD #4536AD

triadic

#3663AD #AD3663 #63AD36

tetradic

#3663AD #AD369F #AD8036 #36AD45

square

#3663AD #AD369F #AD8036 #36AD45

split-complementary

#3663AD #AD4536 #9FAD36

monochromatic

#192E50 #27487E #3663AD #5682CA #85A4D9

Accessibility & contrast

On white

5.92

#3663AD on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.55

#3663AD on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3663AD

5.92:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3663AD	#FFFFFF	#000000	##FFFFFF
##3663AD	1.00	5.92	3.55	5.92
#FFFFFF	5.92	1.00	21.00	1.00
#000000	3.55	21.00	1.00	21.00
##FFFFFF	5.92	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#406AB0

Deuteranopia (green-blind)

#2C5FAB

Tritanopia (blue-blind)

#00747F

Achromatopsia (no color)

#646464

Design tokens & code

CSS

--color: #3663ad;
/* rgb */ color: rgb(54, 99, 173);
/* oklch */ color: oklch(50.6% 0.128 259.8);

Tailwind

colors: {
  custom: {
    50: '#7b8ec6',
    500: '#3663ad',
    950: '#000000',
  },
}

SCSS

$custom: #3663ad;
$custom-light: #7b8ec6;
$custom-dark: #000000;

JSON

{
  "hex": "#3663ad",
  "rgb": {
    "r": 54,
    "g": 99,
    "b": 173
  },
  "hsl": {
    "h": 217.311,
    "s": 52.423,
    "l": 44.51
  },
  "oklch": {
    "l": 0.50587,
    "c": 0.12805,
    "h": 259.8
  },
  "luminance": 0.12725
}

Semantic roles & 50–950 ramp

primary

#3663AD

secondary

#C2A87C

accent

#A54CDC

background

#F7F8FC

surface

#EEF0F8

border

#C9CBD1

text

#0A0C13

muted

#7C7D82

Preview Lab

Preview with #3663AD

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

Preview Lab → · Contrast checker → · Palette generator →