#3665CB#3665CB

#3665CB is a mid, vivid blue. Relative luminance 0.144; OKLCH L 53.1% C 0.167 H 263.3°. Best body text is #FFFFFF at 5.41:1 contrast (WCAG AA passes).

Color values

HEX	#3665CB
RGB	rgb(54, 101, 203)
HSL	hsl(221, 59%, 50%)
HSV	hsv(221, 73%, 80%)
CMYK	cmyk(73.4%, 50.2%, 0%, 20.4%)
CIE-LAB	lab(44.80, 19.36, -57.64)
CIE-LCH	lch(44.80, 60.80, 288.56°)
OKLab	oklab(53.08% -0.0196 -0.1657)
OKLCH	oklch(53.08% 0.167 263.3)
XYZ	xyz(16.9507, 14.4016, 58.3748)
Luminance	0.1440 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3665CB #CB9C36

analogous

#36AFCB #3665CB #5236CB

triadic

#3665CB #CB3665 #65CB36

tetradic

#3665CB #CB36AF #CB9C36 #36CB52

square

#3665CB #CB36AF #CB9C36 #36CB52

split-complementary

#3665CB #CB5236 #AFCB36

monochromatic

#1C356B #284D9C #3665CB #678AD8 #97B0E4

Accessibility & contrast

On white

5.41

#3665CB on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.88

#3665CB on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3665CB

5.41:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3665CB	#FFFFFF	#000000	##FFFFFF
##3665CB	1.00	5.41	3.88	5.41
#FFFFFF	5.41	1.00	21.00	1.00
#000000	3.88	21.00	1.00	21.00
##FFFFFF	5.41	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#2771CF

Deuteranopia (green-blind)

#0064C9

Tritanopia (blue-blind)

#007D8E

Achromatopsia (no color)

#6A6A6A

Design tokens & code

CSS

--color: #3665cb;
/* rgb */ color: rgb(54, 101, 203);
/* oklch */ color: oklch(53.1% 0.167 263.3);

Tailwind

colors: {
  custom: {
    50: '#8190db',
    500: '#3665cb',
    950: '#000000',
  },
}

SCSS

$custom: #3665cb;
$custom-light: #8190db;
$custom-dark: #000000;

JSON

{
  "hex": "#3665cb",
  "rgb": {
    "r": 54,
    "g": 101,
    "b": 203
  },
  "hsl": {
    "h": 221.074,
    "s": 58.893,
    "l": 50.392
  },
  "oklch": {
    "l": 0.53084,
    "c": 0.16685,
    "h": 263.3
  },
  "luminance": 0.14403
}

Semantic roles & 50–950 ramp

primary

#3665CB

secondary

#D0BB8D

accent

#B146E2

background

#F8F8FD

surface

#F0F0FB

border

#CBCBD4

text

#0C0C15

muted

#7D7D83

Preview Lab

Preview with #3665CB

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

Preview Lab → · Contrast checker → · Palette generator →