#3B66C8#3B66C8

#3B66C8 is a mid, vivid blue. Relative luminance 0.146; OKLCH L 53.3% C 0.160 H 264.0°. Best body text is #FFFFFF at 5.36:1 contrast (WCAG AA passes).

Color values

HEX	#3B66C8
RGB	rgb(59, 102, 200)
HSL	hsl(222, 56%, 51%)
HSV	hsv(222, 71%, 78%)
CMYK	cmyk(70.5%, 49%, 0%, 21.6%)
CIE-LAB	lab(45.08, 18.30, -55.45)
CIE-LCH	lch(45.08, 58.39, 288.26°)
OKLab	oklab(53.29% -0.0169 -0.1592)
OKLCH	oklch(53.29% 0.16 264)
XYZ	xyz(16.9766, 14.6009, 56.5559)
Luminance	0.1460 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3B66C8 #C89D3B

analogous

#3BACC8 #3B66C8 #563BC8

triadic

#3B66C8 #C83B66 #66C83B

tetradic

#3B66C8 #C83BAC #C89D3B #3BC856

square

#3B66C8 #C83BAC #C89D3B #3BC856

split-complementary

#3B66C8 #C8563B #ACC83B

monochromatic

#1E356B #2B4D9A #3B66C8 #6B8BD5 #9BB1E3

Accessibility & contrast

On white

5.36

#3B66C8 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.92

#3B66C8 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3B66C8

5.36:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3B66C8	#FFFFFF	#000000	##FFFFFF
##3B66C8	1.00	5.36	3.92	5.36
#FFFFFF	5.36	1.00	21.00	1.00
#000000	3.92	21.00	1.00	21.00
##FFFFFF	5.36	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#2F72CC

Deuteranopia (green-blind)

#0065C6

Tritanopia (blue-blind)

#007D8D

Achromatopsia (no color)

#6B6B6B

Design tokens & code

CSS

--color: #3b66c8;
/* rgb */ color: rgb(59, 102, 200);
/* oklch */ color: oklch(53.3% 0.160 264.0);

Tailwind

colors: {
  custom: {
    50: '#8291d9',
    500: '#3b66c8',
    950: '#000000',
  },
}

SCSS

$custom: #3b66c8;
$custom-light: #8291d9;
$custom-dark: #000000;

JSON

{
  "hex": "#3b66c8",
  "rgb": {
    "r": 59,
    "g": 102,
    "b": 200
  },
  "hsl": {
    "h": 221.702,
    "s": 56.175,
    "l": 50.784
  },
  "oklch": {
    "l": 0.5329,
    "c": 0.16005,
    "h": 264
  },
  "luminance": 0.14603
}

Semantic roles & 50–950 ramp

primary

#3B66C8

secondary

#CFBC90

accent

#B148DF

background

#F8F8FD

surface

#F0F0FB

border

#CBCBD4

text

#0C0C15

muted

#7D7D83

Preview Lab

Preview with #3B66C8

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

Preview Lab → · Contrast checker → · Palette generator →