#3663AA#3663AA

#3663AA is a mid, vivid blue. Relative luminance 0.126; OKLCH L 50.4% C 0.124 H 259.2°. Best body text is #FFFFFF at 5.96:1 contrast (WCAG AA passes).

Color values

HEX	#3663AA
RGB	rgb(54, 99, 170)
HSL	hsl(217, 52%, 44%)
HSV	hsv(217, 68%, 67%)
CMYK	cmyk(68.2%, 41.8%, 0%, 33.3%)
CIE-LAB	lab(42.17, 8.44, -42.66)
CIE-LCH	lch(42.17, 43.49, 281.19°)
OKLab	oklab(50.39% -0.0232 -0.1217)
OKLCH	oklch(50.39% 0.124 259.2)
XYZ	xyz(13.2363, 12.6089, 39.7586)
Luminance	0.1261 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3663AA #AA7D36

analogous

#369DAA #3663AA #4336AA

triadic

#3663AA #AA3663 #63AA36

tetradic

#3663AA #AA369D #AA7D36 #36AA43

square

#3663AA #AA369D #AA7D36 #36AA43

split-complementary

#3663AA #AA4336 #9DAA36

monochromatic

#182D4D #27487C #3663AA #5482C9 #83A4D8

Accessibility & contrast

On white

5.96

#3663AA on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.52

#3663AA on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3663AA

5.96:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3663AA	#FFFFFF	#000000	##FFFFFF
##3663AA	1.00	5.96	3.52	5.96
#FFFFFF	5.96	1.00	21.00	1.00
#000000	3.52	21.00	1.00	21.00
##FFFFFF	5.96	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#4269AD

Deuteranopia (green-blind)

#305FA9

Tritanopia (blue-blind)

#00737E

Achromatopsia (no color)

#646464

Design tokens & code

CSS

--color: #3663aa;
/* rgb */ color: rgb(54, 99, 170);
/* oklch */ color: oklch(50.4% 0.124 259.2);

Tailwind

colors: {
  custom: {
    50: '#7a8ec4',
    500: '#3663aa',
    950: '#000000',
  },
}

SCSS

$custom: #3663aa;
$custom-light: #7a8ec4;
$custom-dark: #000000;

JSON

{
  "hex": "#3663aa",
  "rgb": {
    "r": 54,
    "g": 99,
    "b": 170
  },
  "hsl": {
    "h": 216.724,
    "s": 51.786,
    "l": 43.922
  },
  "oklch": {
    "l": 0.50393,
    "c": 0.12388,
    "h": 259.2
  },
  "luminance": 0.1261
}

Semantic roles & 50–950 ramp

primary

#3663AA

secondary

#C1A67B

accent

#A44DDB

background

#F7F8FC

surface

#EEF0F8

border

#C9CBD1

text

#0A0C12

muted

#7C7D81

Preview Lab

Preview with #3663AA

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

Preview Lab → · Contrast checker → · Palette generator →