#3660CC#3660CC

#3660CC is a mid, vivid blue. Relative luminance 0.135; OKLCH L 52.1% C 0.174 H 264.9°. Best body text is #FFFFFF at 5.67:1 contrast (WCAG AA passes).

Color values

HEX	#3660CC
RGB	rgb(54, 96, 204)
HSL	hsl(223, 60%, 51%)
HSV	hsv(223, 74%, 80%)
CMYK	cmyk(73.5%, 52.9%, 0%, 20%)
CIE-LAB	lab(43.52, 22.94, -60.29)
CIE-LCH	lch(43.52, 64.51, 290.83°)
OKLab	oklab(52.13% -0.0155 -0.1736)
OKLCH	oklch(52.13% 0.174 264.9)
XYZ	xyz(16.5994, 13.5078, 58.8475)
Luminance	0.1351 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3660CC #CCA236

analogous

#36ABCC #3660CC #5736CC

triadic

#3660CC #CC3660 #60CC36

tetradic

#3660CC #CC36AB #CCA236 #36CC57

square

#3660CC #CC36AB #CCA236 #36CC57

split-complementary

#3660CC #CC5736 #ABCC36

monochromatic

#1B326C #28499D #3660CC #6787D8 #98ADE5

Accessibility & contrast

On white

5.67

#3660CC on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.70

#3660CC on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3660CC

5.67:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3660CC	#FFFFFF	#000000	##FFFFFF
##3660CC	1.00	5.67	3.70	5.67
#FFFFFF	5.67	1.00	21.00	1.00
#000000	3.70	21.00	1.00	21.00
##FFFFFF	5.67	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#106ED0

Deuteranopia (green-blind)

#0060CA

Tritanopia (blue-blind)

#007A8D

Achromatopsia (no color)

#676767

Design tokens & code

CSS

--color: #3660cc;
/* rgb */ color: rgb(54, 96, 204);
/* oklch */ color: oklch(52.1% 0.174 264.9);

Tailwind

colors: {
  custom: {
    50: '#818cdc',
    500: '#3660cc',
    950: '#000000',
  },
}

SCSS

$custom: #3660cc;
$custom-light: #818cdc;
$custom-dark: #000000;

JSON

{
  "hex": "#3660cc",
  "rgb": {
    "r": 54,
    "g": 96,
    "b": 204
  },
  "hsl": {
    "h": 223.2,
    "s": 59.524,
    "l": 50.588
  },
  "oklch": {
    "l": 0.5213,
    "c": 0.17427,
    "h": 264.9
  },
  "luminance": 0.1351
}

Semantic roles & 50–950 ramp

primary

#3660CC

secondary

#D0BE8E

accent

#B745E3

background

#F8F8FD

surface

#F0F0FB

border

#CBCBD4

text

#0C0C15

muted

#7D7D83

Preview Lab

Preview with #3660CC

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

Preview Lab → · Contrast checker → · Palette generator →