#3665B2#3665B2

#3665B2 is a mid, vivid blue. Relative luminance 0.133; OKLCH L 51.4% C 0.133 H 259.8°. Best body text is #FFFFFF at 5.74:1 contrast (WCAG AA passes).

Color values

HEX	#3665B2
RGB	rgb(54, 101, 178)
HSL	hsl(217, 53%, 45%)
HSV	hsv(217, 70%, 70%)
CMYK	cmyk(69.7%, 43.3%, 0%, 30.2%)
CIE-LAB	lab(43.22, 10.11, -45.68)
CIE-LCH	lch(43.22, 46.79, 282.48°)
OKLab	oklab(51.36% -0.0236 -0.1305)
OKLCH	oklch(51.36% 0.133 259.8)
XYZ	xyz(14.2080, 13.3045, 43.9301)
Luminance	0.1331 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3665B2 #B28336

analogous

#36A3B2 #3665B2 #4536B2

triadic

#3665B2 #B23665 #65B236

tetradic

#3665B2 #B236A3 #B28336 #36B245

square

#3665B2 #B236A3 #B28336 #36B245

split-complementary

#3665B2 #B24536 #A3B236

monochromatic

#1A3054 #284A83 #3665B2 #5985CD #88A7DB

Accessibility & contrast

On white

5.74

#3665B2 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.66

#3665B2 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3665B2

5.74:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3665B2	#FFFFFF	#000000	##FFFFFF
##3665B2	1.00	5.74	3.66	5.74
#FFFFFF	5.74	1.00	21.00	1.00
#000000	3.66	21.00	1.00	21.00
##FFFFFF	5.74	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#406CB5

Deuteranopia (green-blind)

#2B61B0

Tritanopia (blue-blind)

#007783

Achromatopsia (no color)

#666666

Design tokens & code

CSS

--color: #3665b2;
/* rgb */ color: rgb(54, 101, 178);
/* oklch */ color: oklch(51.4% 0.133 259.8);

Tailwind

colors: {
  custom: {
    50: '#7b90c9',
    500: '#3665b2',
    950: '#000000',
  },
}

SCSS

$custom: #3665b2;
$custom-light: #7b90c9;
$custom-dark: #000000;

JSON

{
  "hex": "#3665b2",
  "rgb": {
    "r": 54,
    "g": 101,
    "b": 178
  },
  "hsl": {
    "h": 217.258,
    "s": 53.448,
    "l": 45.49
  },
  "oklch": {
    "l": 0.51359,
    "c": 0.13263,
    "h": 259.8
  },
  "luminance": 0.13306
}

Semantic roles & 50–950 ramp

primary

#3665B2

secondary

#C5AA7F

accent

#A64BDD

background

#F8F8FC

surface

#EFF0F8

border

#CACBD1

text

#0B0C13

muted

#7C7D82

Preview Lab

Preview with #3665B2

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

Preview Lab → · Contrast checker → · Palette generator →