#3F64D1#3F64D1

#3F64D1 is a mid, vivid blue. Relative luminance 0.148; OKLCH L 53.7% C 0.173 H 266.4°. Best body text is #FFFFFF at 5.31:1 contrast (WCAG AA passes).

Color values

HEX	#3F64D1
RGB	rgb(63, 100, 209)
HSL	hsl(225, 61%, 53%)
HSV	hsv(225, 70%, 82%)
CMYK	cmyk(69.9%, 52.2%, 0%, 18%)
CIE-LAB	lab(45.32, 23.41, -60.23)
CIE-LCH	lch(45.32, 64.62, 291.24°)
OKLab	oklab(53.71% -0.0108 -0.1732)
OKLCH	oklch(53.71% 0.174 266.4)
XYZ	xyz(18.1117, 14.7727, 62.2061)
Luminance	0.1477 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3F64D1 #D1AC3F

analogous

#3FADD1 #3F64D1 #633FD1

triadic

#3F64D1 #D13F64 #64D13F

tetradic

#3F64D1 #D13FAD #D1AC3F #3FD163

square

#3F64D1 #D13FAD #D1AC3F #3FD163

split-complementary

#3F64D1 #D1633F #ADD13F

monochromatic

#1D3479 #294AAA #3F64D1 #708CDD #A2B4E9

Accessibility & contrast

On white

5.31

#3F64D1 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.95

#3F64D1 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3F64D1

5.31:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F64D1	#FFFFFF	#000000	##FFFFFF
##3F64D1	1.00	5.31	3.95	5.31
#FFFFFF	5.31	1.00	21.00	1.00
#000000	3.95	21.00	1.00	21.00
##FFFFFF	5.31	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#1B72D5

Deuteranopia (green-blind)

#0065CF

Tritanopia (blue-blind)

#007E91

Achromatopsia (no color)

#6B6B6B

Design tokens & code

CSS

--color: #3f64d1;
/* rgb */ color: rgb(63, 100, 209);
/* oklch */ color: oklch(53.7% 0.173 266.4);

Tailwind

colors: {
  custom: {
    50: '#858fe0',
    500: '#3f64d1',
    950: '#000000',
  },
}

SCSS

$custom: #3f64d1;
$custom-light: #858fe0;
$custom-dark: #000000;

JSON

{
  "hex": "#3f64d1",
  "rgb": {
    "r": 63,
    "g": 100,
    "b": 209
  },
  "hsl": {
    "h": 224.795,
    "s": 61.345,
    "l": 53.333
  },
  "oklch": {
    "l": 0.53712,
    "c": 0.1735,
    "h": 266.4
  },
  "luminance": 0.14775
}

Semantic roles & 50–950 ramp

primary

#3F64D1

secondary

#D5C597

accent

#BC43E4

background

#F8F8FD

surface

#F0F0FB

border

#CBCBD4

text

#0C0C15

muted

#7D7D83

Preview Lab

Preview with #3F64D1

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

Preview Lab → · Contrast checker → · Palette generator →