#3B66BC#3B66BC

#3B66BC is a mid, vivid blue. Relative luminance 0.141; OKLCH L 52.5% C 0.144 H 262.5°. Best body text is #FFFFFF at 5.51:1 contrast (WCAG AA passes).

Color values

HEX	#3B66BC
RGB	rgb(59, 102, 188)
HSL	hsl(220, 52%, 48%)
HSV	hsv(220, 69%, 74%)
CMYK	cmyk(68.6%, 45.7%, 0%, 26.3%)
CIE-LAB	lab(44.32, 13.92, -49.74)
CIE-LCH	lch(44.32, 51.65, 285.64°)
OKLab	oklab(52.46% -0.0186 -0.1423)
OKLCH	oklch(52.46% 0.144 262.5)
XYZ	xyz(15.6289, 14.0618, 49.4577)
Luminance	0.1406 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3B66BC #BC913B

analogous

#3BA6BC #3B66BC #503BBC

triadic

#3B66BC #BC3B66 #66BC3B

tetradic

#3B66BC #BC3BA6 #BC913B #3BBC50

square

#3B66BC #BC3BA6 #BC913B #3BBC50

split-complementary

#3B66BC #BC503B #A6BC3B

monochromatic

#1E335F #2C4D8D #3B66BC #6589CF #94ACDD

Accessibility & contrast

On white

5.51

#3B66BC on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.81

#3B66BC on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3B66BC

5.51:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3B66BC	#FFFFFF	#000000	##FFFFFF
##3B66BC	1.00	5.51	3.81	5.51
#FFFFFF	5.51	1.00	21.00	1.00
#000000	3.81	21.00	1.00	21.00
##FFFFFF	5.51	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#3B6FBF

Deuteranopia (green-blind)

#2263BA

Tritanopia (blue-blind)

#007A88

Achromatopsia (no color)

#696969

Design tokens & code

CSS

--color: #3b66bc;
/* rgb */ color: rgb(59, 102, 188);
/* oklch */ color: oklch(52.5% 0.144 262.5);

Tailwind

colors: {
  custom: {
    50: '#7f91d1',
    500: '#3b66bc',
    950: '#000000',
  },
}

SCSS

$custom: #3b66bc;
$custom-light: #7f91d1;
$custom-dark: #000000;

JSON

{
  "hex": "#3b66bc",
  "rgb": {
    "r": 59,
    "g": 102,
    "b": 188
  },
  "hsl": {
    "h": 220,
    "s": 52.227,
    "l": 48.431
  },
  "oklch": {
    "l": 0.52463,
    "c": 0.14356,
    "h": 262.5
  },
  "luminance": 0.14063
}

Semantic roles & 50–950 ramp

primary

#3B66BC

secondary

#C9B48A

accent

#AC4CDC

background

#F8F8FC

surface

#EFF0F9

border

#CACBD2

text

#0B0C14

muted

#7C7D82

Preview Lab

Preview with #3B66BC

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

Preview Lab → · Contrast checker → · Palette generator →