#3665BA#3665BA

#3665BA is a mid, vivid blue. Relative luminance 0.136; OKLCH L 51.9% C 0.144 H 261.2°. Best body text is #FFFFFF at 5.63:1 contrast (WCAG AA passes).

Color values

HEX	#3665BA
RGB	rgb(54, 101, 186)
HSL	hsl(219, 55%, 47%)
HSV	hsv(219, 71%, 73%)
CMYK	cmyk(71%, 45.7%, 0%, 27.1%)
CIE-LAB	lab(43.71, 13.06, -49.58)
CIE-LCH	lch(43.71, 51.27, 284.76°)
OKLab	oklab(51.89% -0.0221 -0.142)
OKLCH	oklch(51.89% 0.144 261.2)
XYZ	xyz(15.0348, 13.6352, 48.2844)
Luminance	0.1364 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3665BA #BA8B36

analogous

#36A7BA #3665BA #4936BA

triadic

#3665BA #BA3665 #65BA36

tetradic

#3665BA #BA36A7 #BA8B36 #36BA49

square

#3665BA #BA36A7 #BA8B36 #36BA49

split-complementary

#3665BA #BA4936 #A7BA36

monochromatic

#1A315B #284B8B #3665BA #5D86D0 #8DAADE

Accessibility & contrast

On white

5.63

#3665BA on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.73

#3665BA on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3665BA

5.63:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3665BA	#FFFFFF	#000000	##FFFFFF
##3665BA	1.00	5.63	3.73	5.63
#FFFFFF	5.63	1.00	21.00	1.00
#000000	3.73	21.00	1.00	21.00
##FFFFFF	5.63	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#3A6EBD

Deuteranopia (green-blind)

#1F62B8

Tritanopia (blue-blind)

#007986

Achromatopsia (no color)

#676767

Design tokens & code

CSS

--color: #3665ba;
/* rgb */ color: rgb(54, 101, 186);
/* oklch */ color: oklch(51.9% 0.144 261.2);

Tailwind

colors: {
  custom: {
    50: '#7d90cf',
    500: '#3665ba',
    950: '#000000',
  },
}

SCSS

$custom: #3665ba;
$custom-light: #7d90cf;
$custom-dark: #000000;

JSON

{
  "hex": "#3665ba",
  "rgb": {
    "r": 54,
    "g": 101,
    "b": 186
  },
  "hsl": {
    "h": 218.636,
    "s": 55,
    "l": 47.059
  },
  "oklch": {
    "l": 0.51891,
    "c": 0.14367,
    "h": 261.2
  },
  "luminance": 0.13637
}

Semantic roles & 50–950 ramp

primary

#3665BA

secondary

#C8B084

accent

#A949DE

background

#F8F8FC

surface

#EFF0F9

border

#CACBD2

text

#0B0C14

muted

#7C7D82

Preview Lab

Preview with #3665BA

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

Preview Lab → · Contrast checker → · Palette generator →