#3665BD#3665BD

#3665BD is a mid, vivid blue. Relative luminance 0.138; OKLCH L 52.1% C 0.148 H 261.6°. Best body text is #FFFFFF at 5.60:1 contrast (WCAG AA passes).

Color values

HEX	#3665BD
RGB	rgb(54, 101, 189)
HSL	hsl(219, 56%, 48%)
HSV	hsv(219, 71%, 74%)
CMYK	cmyk(71.4%, 46.6%, 0%, 25.9%)
CIE-LAB	lab(43.89, 14.17, -51.02)
CIE-LCH	lch(43.89, 52.95, 285.52°)
OKLab	oklab(52.1% -0.0216 -0.1462)
OKLCH	oklch(52.1% 0.148 261.6)
XYZ	xyz(15.3570, 13.7641, 49.9816)
Luminance	0.1377 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3665BD #BD8E36

analogous

#36A9BD #3665BD #4A36BD

triadic

#3665BD #BD3665 #65BD36

tetradic

#3665BD #BD36A9 #BD8E36 #36BD4A

square

#3665BD #BD36A9 #BD8E36 #36BD4A

split-complementary

#3665BD #BD4A36 #A9BD36

monochromatic

#1B325E #284C8D #3665BD #5F87D1 #8FABDF

Accessibility & contrast

On white

5.60

#3665BD on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.75

#3665BD on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3665BD

5.60:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3665BD	#FFFFFF	#000000	##FFFFFF
##3665BD	1.00	5.60	3.75	5.60
#FFFFFF	5.60	1.00	21.00	1.00
#000000	3.75	21.00	1.00	21.00
##FFFFFF	5.60	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#376EC0

Deuteranopia (green-blind)

#1962BB

Tritanopia (blue-blind)

#007A88

Achromatopsia (no color)

#686868

Design tokens & code

CSS

--color: #3665bd;
/* rgb */ color: rgb(54, 101, 189);
/* oklch */ color: oklch(52.1% 0.148 261.6);

Tailwind

colors: {
  custom: {
    50: '#7e90d1',
    500: '#3665bd',
    950: '#000000',
  },
}

SCSS

$custom: #3665bd;
$custom-light: #7e90d1;
$custom-dark: #000000;

JSON

{
  "hex": "#3665bd",
  "rgb": {
    "r": 54,
    "g": 101,
    "b": 189
  },
  "hsl": {
    "h": 219.111,
    "s": 55.556,
    "l": 47.647
  },
  "oklch": {
    "l": 0.52096,
    "c": 0.14779,
    "h": 261.6
  },
  "luminance": 0.13766
}

Semantic roles & 50–950 ramp

primary

#3665BD

secondary

#C9B285

accent

#AB49DF

background

#F8F8FC

surface

#EFF0F9

border

#CACBD2

text

#0B0C14

muted

#7C7D82

Preview Lab

Preview with #3665BD

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

Preview Lab → · Contrast checker → · Palette generator →