#3B66CD#3B66CD

#3B66CD is a mid, vivid blue. Relative luminance 0.148; OKLCH L 53.6% C 0.167 H 264.4°. Best body text is #FFFFFF at 5.29:1 contrast (WCAG AA passes).

Color values

HEX	#3B66CD
RGB	rgb(59, 102, 205)
HSL	hsl(222, 59%, 52%)
HSV	hsv(222, 71%, 80%)
CMYK	cmyk(71.2%, 50.2%, 0%, 19.6%)
CIE-LAB	lab(45.41, 20.12, -57.80)
CIE-LCH	lch(45.41, 61.20, 289.20°)
OKLab	oklab(53.65% -0.0162 -0.166)
OKLCH	oklch(53.65% 0.167 264.4)
XYZ	xyz(17.5706, 14.8385, 59.6839)
Luminance	0.1484 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3B66CD #CDA23B

analogous

#3BAFCD #3B66CD #593BCD

triadic

#3B66CD #CD3B66 #66CD3B

tetradic

#3B66CD #CD3BAF #CDA23B #3BCD59

square

#3B66CD #CD3BAF #CDA23B #3BCD59

split-complementary

#3B66CD #CD593B #AFCD3B

monochromatic

#1D3671 #294DA2 #3B66CD #6C8CD9 #9DB2E6

Accessibility & contrast

On white

5.29

#3B66CD on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.97

#3B66CD on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3B66CD

5.29:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3B66CD	#FFFFFF	#000000	##FFFFFF
##3B66CD	1.00	5.29	3.97	5.29
#FFFFFF	5.29	1.00	21.00	1.00
#000000	3.97	21.00	1.00	21.00
##FFFFFF	5.29	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#2873D1

Deuteranopia (green-blind)

#0065CB

Tritanopia (blue-blind)

#007E90

Achromatopsia (no color)

#6B6B6B

Design tokens & code

CSS

--color: #3b66cd;
/* rgb */ color: rgb(59, 102, 205);
/* oklch */ color: oklch(53.6% 0.167 264.4);

Tailwind

colors: {
  custom: {
    50: '#8391dd',
    500: '#3b66cd',
    950: '#000000',
  },
}

SCSS

$custom: #3b66cd;
$custom-light: #8391dd;
$custom-dark: #000000;

JSON

{
  "hex": "#3b66cd",
  "rgb": {
    "r": 59,
    "g": 102,
    "b": 205
  },
  "hsl": {
    "h": 222.329,
    "s": 59.35,
    "l": 51.765
  },
  "oklch": {
    "l": 0.53647,
    "c": 0.16684,
    "h": 264.4
  },
  "luminance": 0.1484
}

Semantic roles & 50–950 ramp

primary

#3B66CD

secondary

#D2BF92

accent

#B445E3

background

#F8F8FD

surface

#F0F0FB

border

#CBCBD4

text

#0C0C15

muted

#7D7D83

Preview Lab

Preview with #3B66CD

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

Preview Lab → · Contrast checker → · Palette generator →