#3F65D1#3F65D1

#3F65D1 is a mid, vivid blue. Relative luminance 0.150; OKLCH L 53.9% C 0.172 H 266.1°. Best body text is #FFFFFF at 5.26:1 contrast (WCAG AA passes).

Color values

HEX	#3F65D1
RGB	rgb(63, 101, 209)
HSL	hsl(224, 61%, 53%)
HSV	hsv(224, 70%, 82%)
CMYK	cmyk(69.9%, 51.7%, 0%, 18%)
CIE-LAB	lab(45.59, 22.77, -59.80)
CIE-LCH	lch(45.59, 63.99, 290.85°)
OKLab	oklab(53.91% -0.0116 -0.1719)
OKLCH	oklch(53.91% 0.172 266.1)
XYZ	xyz(18.2082, 14.9657, 62.2383)
Luminance	0.1497 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3F65D1 #D1AB3F

analogous

#3FAED1 #3F65D1 #623FD1

triadic

#3F65D1 #D13F65 #65D13F

tetradic

#3F65D1 #D13FAE #D1AB3F #3FD162

square

#3F65D1 #D13FAE #D1AB3F #3FD162

split-complementary

#3F65D1 #D1623F #AED13F

monochromatic

#1D3579 #294AAA #3F65D1 #708DDD #A2B4E9

Accessibility & contrast

On white

5.26

#3F65D1 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.99

#3F65D1 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3F65D1

5.26:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F65D1	#FFFFFF	#000000	##FFFFFF
##3F65D1	1.00	5.26	3.99	5.26
#FFFFFF	5.26	1.00	21.00	1.00
#000000	3.99	21.00	1.00	21.00
##FFFFFF	5.26	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#1F73D5

Deuteranopia (green-blind)

#0066CF

Tritanopia (blue-blind)

#007F91

Achromatopsia (no color)

#6C6C6C

Design tokens & code

CSS

--color: #3f65d1;
/* rgb */ color: rgb(63, 101, 209);
/* oklch */ color: oklch(53.9% 0.172 266.1);

Tailwind

colors: {
  custom: {
    50: '#8590e0',
    500: '#3f65d1',
    950: '#000000',
  },
}

SCSS

$custom: #3f65d1;
$custom-light: #8590e0;
$custom-dark: #000000;

JSON

{
  "hex": "#3f65d1",
  "rgb": {
    "r": 63,
    "g": 101,
    "b": 209
  },
  "hsl": {
    "h": 224.384,
    "s": 61.345,
    "l": 53.333
  },
  "oklch": {
    "l": 0.53914,
    "c": 0.17227,
    "h": 266.1
  },
  "luminance": 0.14968
}

Semantic roles & 50–950 ramp

primary

#3F65D1

secondary

#D5C597

accent

#BB43E4

background

#F8F8FD

surface

#F0F0FB

border

#CBCBD4

text

#0C0C15

muted

#7D7D83

Preview Lab

Preview with #3F65D1

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

Preview Lab → · Contrast checker → · Palette generator →