#3966CF#3966CF

#3966CF is a mid, vivid blue. Relative luminance 0.149; OKLCH L 53.7% C 0.170 H 264.1°. Best body text is #FFFFFF at 5.28:1 contrast (WCAG AA passes).

Color values

HEX	#3966CF
RGB	rgb(57, 102, 207)
HSL	hsl(222, 61%, 52%)
HSV	hsv(222, 72%, 81%)
CMYK	cmyk(72.5%, 50.7%, 0%, 18.8%)
CIE-LAB	lab(45.46, 20.58, -58.87)
CIE-LCH	lch(45.46, 62.36, 289.27°)
OKLab	oklab(53.71% -0.0176 -0.1692)
OKLCH	oklch(53.71% 0.17 264.1)
XYZ	xyz(17.6972, 14.8757, 60.9580)
Luminance	0.1488 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3966CF #CFA239

analogous

#39B1CF #3966CF #5739CF

triadic

#3966CF #CF3966 #66CF39

tetradic

#3966CF #CF39B1 #CFA239 #39CF57

square

#3966CF #CF39B1 #CFA239 #39CF57

split-complementary

#3966CF #CF5739 #B1CF39

monochromatic

#1C3672 #284DA3 #3966CF #6A8CDB #9CB2E7

Accessibility & contrast

On white

5.28

#3966CF on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.98

#3966CF on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3966CF

5.28:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3966CF	#FFFFFF	#000000	##FFFFFF
##3966CF	1.00	5.28	3.98	5.28
#FFFFFF	5.28	1.00	21.00	1.00
#000000	3.98	21.00	1.00	21.00
##FFFFFF	5.28	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#2573D3

Deuteranopia (green-blind)

#0065CD

Tritanopia (blue-blind)

#007F91

Achromatopsia (no color)

#6C6C6C

Design tokens & code

CSS

--color: #3966cf;
/* rgb */ color: rgb(57, 102, 207);
/* oklch */ color: oklch(53.7% 0.170 264.1);

Tailwind

colors: {
  custom: {
    50: '#8291de',
    500: '#3966cf',
    950: '#000000',
  },
}

SCSS

$custom: #3966cf;
$custom-light: #8291de;
$custom-dark: #000000;

JSON

{
  "hex": "#3966cf",
  "rgb": {
    "r": 57,
    "g": 102,
    "b": 207
  },
  "hsl": {
    "h": 222,
    "s": 60.976,
    "l": 51.765
  },
  "oklch": {
    "l": 0.53706,
    "c": 0.17014,
    "h": 264.1
  },
  "luminance": 0.14878
}

Semantic roles & 50–950 ramp

primary

#3966CF

secondary

#D3BF91

accent

#B444E4

background

#F8F8FD

surface

#F0F0FB

border

#CBCBD4

text

#0C0C15

muted

#7D7D83

Preview Lab

Preview with #3966CF

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

Preview Lab → · Contrast checker → · Palette generator →