#3F65B2#3F65B2

#3F65B2 is a mid, vivid blue. Relative luminance 0.136; OKLCH L 51.8% C 0.129 H 262.9°. Best body text is #FFFFFF at 5.65:1 contrast (WCAG AA passes).

Color values

HEX	#3F65B2
RGB	rgb(63, 101, 178)
HSL	hsl(220, 48%, 47%)
HSV	hsv(220, 65%, 70%)
CMYK	cmyk(64.6%, 43.3%, 0%, 30.2%)
CIE-LAB	lab(43.62, 11.63, -45.02)
CIE-LCH	lch(43.62, 46.50, 284.48°)
OKLab	oklab(51.78% -0.016 -0.1284)
OKLCH	oklch(51.78% 0.129 262.9)
XYZ	xyz(14.7366, 13.5771, 43.9549)
Luminance	0.1358 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3F65B2 #B28C3F

analogous

#3F9FB2 #3F65B2 #533FB2

triadic

#3F65B2 #B23F65 #65B23F

tetradic

#3F65B2 #B23F9F #B28C3F #3FB253

square

#3F65B2 #B23F9F #B28C3F #3FB253

split-complementary

#3F65B2 #B2533F #9FB23F

monochromatic

#1F3258 #2F4B85 #3F65B2 #6686C9 #93AAD9

Accessibility & contrast

On white

5.65

#3F65B2 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.72

#3F65B2 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3F65B2

5.65:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F65B2	#FFFFFF	#000000	##FFFFFF
##3F65B2	1.00	5.65	3.72	5.65
#FFFFFF	5.65	1.00	21.00	1.00
#000000	3.72	21.00	1.00	21.00
##FFFFFF	5.65	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#416DB5

Deuteranopia (green-blind)

#2F62B0

Tritanopia (blue-blind)

#007783

Achromatopsia (no color)

#676767

Design tokens & code

CSS

--color: #3f65b2;
/* rgb */ color: rgb(63, 101, 178);
/* oklch */ color: oklch(51.8% 0.129 262.9);

Tailwind

colors: {
  custom: {
    50: '#7f90c9',
    500: '#3f65b2',
    950: '#000000',
  },
}

SCSS

$custom: #3f65b2;
$custom-light: #7f90c9;
$custom-dark: #000000;

JSON

{
  "hex": "#3f65b2",
  "rgb": {
    "r": 63,
    "g": 101,
    "b": 178
  },
  "hsl": {
    "h": 220.174,
    "s": 47.718,
    "l": 47.255
  },
  "oklch": {
    "l": 0.51779,
    "c": 0.12941,
    "h": 262.9
  },
  "luminance": 0.13578
}

Semantic roles & 50–950 ramp

primary

#3F65B2

secondary

#C4B089

accent

#AB50D7

background

#F8F8FC

surface

#EFF0F8

border

#CACBD1

text

#0B0C13

muted

#7C7D82

Preview Lab

Preview with #3F65B2

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

Preview Lab → · Contrast checker → · Palette generator →