#3964C9#3964C9

#3964C9 is a mid, vivid blue. Relative luminance 0.142; OKLCH L 52.9% C 0.164 H 264.2°. Best body text is #FFFFFF at 5.47:1 contrast (WCAG AA passes).

Color values

HEX	#3964C9
RGB	rgb(57, 100, 201)
HSL	hsl(222, 57%, 51%)
HSV	hsv(222, 72%, 79%)
CMYK	cmyk(71.6%, 50.2%, 0%, 21.2%)
CIE-LAB	lab(44.52, 19.66, -56.95)
CIE-LCH	lch(44.52, 60.24, 289.05°)
OKLab	oklab(52.86% -0.0167 -0.1636)
OKLCH	oklch(52.86% 0.164 264.2)
XYZ	xyz(16.7834, 14.1995, 57.1033)
Luminance	0.1420 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3964C9 #C99E39

analogous

#39ACC9 #3964C9 #5639C9

triadic

#3964C9 #C93964 #64C939

tetradic

#3964C9 #C939AC #C99E39 #39C956

square

#3964C9 #C939AC #C99E39 #39C956

split-complementary

#3964C9 #C95639 #ACC939

monochromatic

#1D346B #2A4C9B #3964C9 #698AD6 #99AFE3

Accessibility & contrast

On white

5.47

#3964C9 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.84

#3964C9 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3964C9

5.47:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3964C9	#FFFFFF	#000000	##FFFFFF
##3964C9	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)

#2770CD

Deuteranopia (green-blind)

#0063C7

Tritanopia (blue-blind)

#007C8D

Achromatopsia (no color)

#696969

Design tokens & code

CSS

--color: #3964c9;
/* rgb */ color: rgb(57, 100, 201);
/* oklch */ color: oklch(52.9% 0.164 264.2);

Tailwind

colors: {
  custom: {
    50: '#818fda',
    500: '#3964c9',
    950: '#000000',
  },
}

SCSS

$custom: #3964c9;
$custom-light: #818fda;
$custom-dark: #000000;

JSON

{
  "hex": "#3964c9",
  "rgb": {
    "r": 57,
    "g": 100,
    "b": 201
  },
  "hsl": {
    "h": 222.083,
    "s": 57.143,
    "l": 50.588
  },
  "oklch": {
    "l": 0.52857,
    "c": 0.16446,
    "h": 264.2
  },
  "luminance": 0.14201
}

Semantic roles & 50–950 ramp

primary

#3964C9

secondary

#CFBC8F

accent

#B347E0

background

#F8F8FD

surface

#F0F0FB

border

#CBCBD4

text

#0C0C15

muted

#7D7D83

Preview Lab

Preview with #3964C9

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

Preview Lab → · Contrast checker → · Palette generator →