#3B66CC#3B66CC

#3B66CC is a mid, vivid blue. Relative luminance 0.148; OKLCH L 53.6% C 0.165 H 264.3°. Best body text is #FFFFFF at 5.31:1 contrast (WCAG AA passes).

Color values

HEX	#3B66CC
RGB	rgb(59, 102, 204)
HSL	hsl(222, 59%, 52%)
HSV	hsv(222, 71%, 80%)
CMYK	cmyk(71.1%, 50%, 0%, 20%)
CIE-LAB	lab(45.35, 19.76, -57.33)
CIE-LCH	lch(45.35, 60.64, 289.01°)
OKLab	oklab(53.58% -0.0164 -0.1647)
OKLCH	oklch(53.58% 0.165 264.3)
XYZ	xyz(17.4502, 14.7904, 59.0502)
Luminance	0.1479 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3B66CC #CCA13B

analogous

#3BAFCC #3B66CC #593BCC

triadic

#3B66CC #CC3B66 #66CC3B

tetradic

#3B66CC #CC3BAF #CCA13B #3BCC59

square

#3B66CC #CC3BAF #CCA13B #3BCC59

split-complementary

#3B66CC #CC593B #AFCC3B

monochromatic

#1D3670 #2A4DA0 #3B66CC #6C8CD9 #9CB2E5

Accessibility & contrast

On white

5.31

#3B66CC on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.96

#3B66CC on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3B66CC

5.31:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3B66CC	#FFFFFF	#000000	##FFFFFF
##3B66CC	1.00	5.31	3.96	5.31
#FFFFFF	5.31	1.00	21.00	1.00
#000000	3.96	21.00	1.00	21.00
##FFFFFF	5.31	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#2A72D0

Deuteranopia (green-blind)

#0065CA

Tritanopia (blue-blind)

#007E8F

Achromatopsia (no color)

#6B6B6B

Design tokens & code

CSS

--color: #3b66cc;
/* rgb */ color: rgb(59, 102, 204);
/* oklch */ color: oklch(53.6% 0.165 264.3);

Tailwind

colors: {
  custom: {
    50: '#8391dc',
    500: '#3b66cc',
    950: '#000000',
  },
}

SCSS

$custom: #3b66cc;
$custom-light: #8391dc;
$custom-dark: #000000;

JSON

{
  "hex": "#3b66cc",
  "rgb": {
    "r": 59,
    "g": 102,
    "b": 204
  },
  "hsl": {
    "h": 222.207,
    "s": 58.704,
    "l": 51.569
  },
  "oklch": {
    "l": 0.53575,
    "c": 0.16549,
    "h": 264.3
  },
  "luminance": 0.14792
}

Semantic roles & 50–950 ramp

primary

#3B66CC

secondary

#D1BE92

accent

#B446E2

background

#F8F8FD

surface

#F0F0FB

border

#CBCBD4

text

#0C0C15

muted

#7D7D83

Preview Lab

Preview with #3B66CC

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

Preview Lab → · Contrast checker → · Palette generator →