#3F64B2#3F64B2

#3F64B2 is a mid, vivid blue. Relative luminance 0.134; OKLCH L 51.6% C 0.131 H 263.4°. Best body text is #FFFFFF at 5.71:1 contrast (WCAG AA passes).

Color values

HEX	#3F64B2
RGB	rgb(63, 100, 178)
HSL	hsl(221, 48%, 47%)
HSV	hsv(221, 65%, 70%)
CMYK	cmyk(64.6%, 43.8%, 0%, 30.2%)
CIE-LAB	lab(43.34, 12.26, -45.47)
CIE-LCH	lch(43.34, 47.10, 285.09°)
OKLab	oklab(51.56% -0.015 -0.1298)
OKLCH	oklch(51.56% 0.131 263.4)
XYZ	xyz(14.6401, 13.3841, 43.9227)
Luminance	0.1338 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3F64B2 #B28D3F

analogous

#3F9DB2 #3F64B2 #543FB2

triadic

#3F64B2 #B23F64 #64B23F

tetradic

#3F64B2 #B23F9D #B28D3F #3FB254

square

#3F64B2 #B23F9D #B28D3F #3FB254

split-complementary

#3F64B2 #B2543F #9DB23F

monochromatic

#1F3158 #2F4B85 #3F64B2 #6685C9 #93A9D9

Accessibility & contrast

On white

5.71

#3F64B2 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.68

#3F64B2 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3F64B2

5.71:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F64B2	#FFFFFF	#000000	##FFFFFF
##3F64B2	1.00	5.71	3.68	5.71
#FFFFFF	5.71	1.00	21.00	1.00
#000000	3.68	21.00	1.00	21.00
##FFFFFF	5.71	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#406CB5

Deuteranopia (green-blind)

#2D61B0

Tritanopia (blue-blind)

#007682

Achromatopsia (no color)

#666666

Design tokens & code

CSS

--color: #3f64b2;
/* rgb */ color: rgb(63, 100, 178);
/* oklch */ color: oklch(51.6% 0.131 263.4);

Tailwind

colors: {
  custom: {
    50: '#7f8fc9',
    500: '#3f64b2',
    950: '#000000',
  },
}

SCSS

$custom: #3f64b2;
$custom-light: #7f8fc9;
$custom-dark: #000000;

JSON

{
  "hex": "#3f64b2",
  "rgb": {
    "r": 63,
    "g": 100,
    "b": 178
  },
  "hsl": {
    "h": 220.696,
    "s": 47.718,
    "l": 47.255
  },
  "oklch": {
    "l": 0.5156,
    "c": 0.13062,
    "h": 263.4
  },
  "luminance": 0.13385
}

Semantic roles & 50–950 ramp

primary

#3F64B2

secondary

#C4B189

accent

#AC50D7

background

#F8F8FC

surface

#EFF0F8

border

#CACBD1

text

#0B0C13

muted

#7C7D82

Preview Lab

Preview with #3F64B2

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

Preview Lab → · Contrast checker → · Palette generator →