#3B66BF#3B66BF

#3B66BF is a mid, vivid blue. Relative luminance 0.142; OKLCH L 52.7% C 0.148 H 262.9°. Best body text is #FFFFFF at 5.47:1 contrast (WCAG AA passes).

Color values

HEX	#3B66BF
RGB	rgb(59, 102, 191)
HSL	hsl(220, 53%, 49%)
HSV	hsv(220, 69%, 75%)
CMYK	cmyk(69.1%, 46.6%, 0%, 25.1%)
CIE-LAB	lab(44.51, 15.01, -51.18)
CIE-LCH	lch(44.51, 53.34, 286.35°)
OKLab	oklab(52.67% -0.0182 -0.1466)
OKLCH	oklch(52.67% 0.148 262.9)
XYZ	xyz(15.9556, 14.1925, 51.1787)
Luminance	0.1419 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3B66BF #BF943B

analogous

#3BA8BF #3B66BF #523BBF

triadic

#3B66BF #BF3B66 #66BF3B

tetradic

#3B66BF #BF3BA8 #BF943B #3BBF52

square

#3B66BF #BF3BA8 #BF943B #3BBF52

split-complementary

#3B66BF #BF523B #A8BF3B

monochromatic

#1E3461 #2D4D90 #3B66BF #6789D0 #96AEDF

Accessibility & contrast

On white

5.47

#3B66BF on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.84

#3B66BF on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3B66BF

5.47:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3B66BF	#FFFFFF	#000000	##FFFFFF
##3B66BF	1.00	5.47	3.84	5.47
#FFFFFF	5.47	1.00	21.00	1.00
#000000	3.84	21.00	1.00	21.00
##FFFFFF	5.47	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#3870C2

Deuteranopia (green-blind)

#1C64BD

Tritanopia (blue-blind)

#007B89

Achromatopsia (no color)

#696969

Design tokens & code

CSS

--color: #3b66bf;
/* rgb */ color: rgb(59, 102, 191);
/* oklch */ color: oklch(52.7% 0.148 262.9);

Tailwind

colors: {
  custom: {
    50: '#8091d3',
    500: '#3b66bf',
    950: '#000000',
  },
}

SCSS

$custom: #3b66bf;
$custom-light: #8091d3;
$custom-dark: #000000;

JSON

{
  "hex": "#3b66bf",
  "rgb": {
    "r": 59,
    "g": 102,
    "b": 191
  },
  "hsl": {
    "h": 220.455,
    "s": 52.8,
    "l": 49.02
  },
  "oklch": {
    "l": 0.52666,
    "c": 0.1477,
    "h": 262.9
  },
  "luminance": 0.14194
}

Semantic roles & 50–950 ramp

primary

#3B66BF

secondary

#CAB68C

accent

#AD4CDC

background

#F8F8FD

surface

#F0F0FA

border

#CBCBD3

text

#0B0C14

muted

#7C7D83

Preview Lab

Preview with #3B66BF

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

Preview Lab → · Contrast checker → · Palette generator →