#3660DD#3660DD

#3660DD is a mid, vivid blue. Relative luminance 0.144; OKLCH L 53.5% C 0.197 H 265.8°. Best body text is #FFFFFF at 5.42:1 contrast (WCAG AA passes).

Color values

HEX	#3660DD
RGB	rgb(54, 96, 221)
HSL	hsl(225, 71%, 54%)
HSV	hsv(225, 76%, 87%)
CMYK	cmyk(75.6%, 56.6%, 0%, 13.3%)
CIE-LAB	lab(44.76, 29.19, -68.01)
CIE-LCH	lch(44.76, 74.01, 293.23°)
OKLab	oklab(53.45% -0.0143 -0.1963)
OKLCH	oklch(53.45% 0.197 265.8)
XYZ	xyz(18.7507, 14.3684, 70.1777)
Luminance	0.1437 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3660DD #DDB336

analogous

#36B4DD #3660DD #6036DD

triadic

#3660DD #DD3660 #60DD36

tetradic

#3660DD #DD36B4 #DDB336 #36DD60

square

#3660DD #DD36B4 #DDB336 #36DD60

split-complementary

#3660DD #DD6036 #B4DD36

monochromatic

#163183 #1F45B7 #3660DD #6A89E6 #9FB3EF

Accessibility & contrast

On white

5.42

#3660DD on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.87

#3660DD on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3660DD

5.42:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3660DD	#FFFFFF	#000000	##FFFFFF
##3660DD	1.00	5.42	3.87	5.42
#FFFFFF	5.42	1.00	21.00	1.00
#000000	3.87	21.00	1.00	21.00
##FFFFFF	5.42	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0072E1

Deuteranopia (green-blind)

#0062DB

Tritanopia (blue-blind)

#007F95

Achromatopsia (no color)

#6A6A6A

Design tokens & code

CSS

--color: #3660dd;
/* rgb */ color: rgb(54, 96, 221);
/* oklch */ color: oklch(53.5% 0.197 265.8);

Tailwind

colors: {
  custom: {
    50: '#858ce8',
    500: '#3660dd',
    950: '#000000',
  },
}

SCSS

$custom: #3660dd;
$custom-light: #858ce8;
$custom-dark: #000000;

JSON

{
  "hex": "#3660dd",
  "rgb": {
    "r": 54,
    "g": 96,
    "b": 221
  },
  "hsl": {
    "h": 224.91,
    "s": 71.064,
    "l": 53.922
  },
  "oklch": {
    "l": 0.53454,
    "c": 0.19679,
    "h": 265.8
  },
  "luminance": 0.1437
}

Semantic roles & 50–950 ramp

primary

#3660DD

secondary

#DBC994

accent

#C13AEE

background

#F9F8FE

surface

#F1F0FD

border

#CBCBD5

text

#0D0C16

muted

#7E7D84

Preview Lab

Preview with #3660DD

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

Preview Lab → · Contrast checker → · Palette generator →