#3660BD#3660BD

#3660BD is a mid, vivid blue. Relative luminance 0.128; OKLCH L 51.0% C 0.154 H 263.6°. Best body text is #FFFFFF at 5.89:1 contrast (WCAG AA passes).

Color values

HEX	#3660BD
RGB	rgb(54, 96, 189)
HSL	hsl(221, 56%, 48%)
HSV	hsv(221, 71%, 74%)
CMYK	cmyk(71.4%, 49.2%, 0%, 25.9%)
CIE-LAB	lab(42.49, 17.38, -53.27)
CIE-LCH	lch(42.49, 56.03, 288.07°)
OKLab	oklab(51.03% -0.0171 -0.1529)
OKLCH	oklch(51.03% 0.154 263.6)
XYZ	xyz(14.8862, 12.8226, 49.8247)
Luminance	0.1282 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3660BD #BD9336

analogous

#36A4BD #3660BD #4F36BD

triadic

#3660BD #BD3660 #60BD36

tetradic

#3660BD #BD36A4 #BD9336 #36BD4F

square

#3660BD #BD36A4 #BD9336 #36BD4F

split-complementary

#3660BD #BD4F36 #A4BD36

monochromatic

#1B305E #28488D #3660BD #5F83D1 #8FA8DF

Accessibility & contrast

On white

5.89

#3660BD on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.56

#3660BD on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3660BD

5.89:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3660BD	#FFFFFF	#000000	##FFFFFF
##3660BD	1.00	5.89	3.56	5.89
#FFFFFF	5.89	1.00	21.00	1.00
#000000	3.56	21.00	1.00	21.00
##FFFFFF	5.89	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#2B6BC0

Deuteranopia (green-blind)

#005EBB

Tritanopia (blue-blind)

#007685

Achromatopsia (no color)

#646464

Design tokens & code

CSS

--color: #3660bd;
/* rgb */ color: rgb(54, 96, 189);
/* oklch */ color: oklch(51.0% 0.154 263.6);

Tailwind

colors: {
  custom: {
    50: '#7e8cd1',
    500: '#3660bd',
    950: '#000000',
  },
}

SCSS

$custom: #3660bd;
$custom-light: #7e8cd1;
$custom-dark: #000000;

JSON

{
  "hex": "#3660bd",
  "rgb": {
    "r": 54,
    "g": 96,
    "b": 189
  },
  "hsl": {
    "h": 221.333,
    "s": 55.556,
    "l": 47.647
  },
  "oklch": {
    "l": 0.51025,
    "c": 0.15387,
    "h": 263.6
  },
  "luminance": 0.12824
}

Semantic roles & 50–950 ramp

primary

#3660BD

secondary

#C9B485

accent

#B049DF

background

#F8F8FC

surface

#EFF0F9

border

#CACBD2

text

#0B0C14

muted

#7C7D82

Preview Lab

Preview with #3660BD

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

Preview Lab → · Contrast checker → · Palette generator →