#3663A3#3663A3

#3663A3 is a mid, moderate blue. Relative luminance 0.124; OKLCH L 50.0% C 0.114 H 257.4°. Best body text is #FFFFFF at 6.05:1 contrast (WCAG AA passes).

Color values

HEX	#3663A3
RGB	rgb(54, 99, 163)
HSL	hsl(215, 50%, 43%)
HSV	hsv(215, 67%, 64%)
CMYK	cmyk(66.9%, 39.3%, 0%, 36.1%)
CIE-LAB	lab(41.77, 5.89, -39.16)
CIE-LCH	lch(41.77, 39.60, 278.55°)
OKLab	oklab(49.95% -0.0248 -0.1114)
OKLCH	oklch(49.95% 0.114 257.4)
XYZ	xyz(12.5916, 12.3511, 36.3636)
Luminance	0.1235 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3663A3 #A37636

analogous

#369AA3 #3663A3 #3F36A3

triadic

#3663A3 #A33663 #63A336

tetradic

#3663A3 #A3369A #A37636 #36A33F

square

#3663A3 #A3369A #A37636 #36A33F

split-complementary

#3663A3 #A33F36 #9AA336

monochromatic

#182B47 #274775 #3663A3 #5181C5 #7FA2D5

Accessibility & contrast

On white

6.05

#3663A3 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.47

#3663A3 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3663A3

6.05:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3663A3	#FFFFFF	#000000	##FFFFFF
##3663A3	1.00	6.05	3.47	6.05
#FFFFFF	6.05	1.00	21.00	1.00
#000000	3.47	21.00	1.00	21.00
##FFFFFF	6.05	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#4668A6

Deuteranopia (green-blind)

#365EA2

Tritanopia (blue-blind)

#00727B

Achromatopsia (no color)

#636363

Design tokens & code

CSS

--color: #3663a3;
/* rgb */ color: rgb(54, 99, 163);
/* oklch */ color: oklch(50.0% 0.114 257.4);

Tailwind

colors: {
  custom: {
    50: '#798fbe',
    500: '#3663a3',
    950: '#000000',
  },
}

SCSS

$custom: #3663a3;
$custom-light: #798fbe;
$custom-dark: #000000;

JSON

{
  "hex": "#3663a3",
  "rgb": {
    "r": 54,
    "g": 99,
    "b": 163
  },
  "hsl": {
    "h": 215.229,
    "s": 50.23,
    "l": 42.549
  },
  "oklch": {
    "l": 0.49954,
    "c": 0.11414,
    "h": 257.4
  },
  "luminance": 0.12352
}

Semantic roles & 50–950 ramp

primary

#3663A3

secondary

#BEA177

accent

#A04EDA

background

#F7F8FB

surface

#EEF0F7

border

#C9CBD0

text

#0A0C12

muted

#7C7D81

Preview Lab

Preview with #3663A3

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

Preview Lab → · Contrast checker → · Palette generator →