#3F65DB#3F65DB

#3F65DB is a mid, vivid blue. Relative luminance 0.155; OKLCH L 54.7% C 0.186 H 266.7°. Best body text is #FFFFFF at 5.13:1 contrast (WCAG AA passes).

Color values

HEX	#3F65DB
RGB	rgb(63, 101, 219)
HSL	hsl(225, 68%, 55%)
HSV	hsv(225, 71%, 86%)
CMYK	cmyk(71.2%, 53.9%, 0%, 14.1%)
CIE-LAB	lab(46.28, 26.37, -64.38)
CIE-LCH	lch(46.28, 69.57, 292.28°)
OKLab	oklab(54.66% -0.0108 -0.1854)
OKLCH	oklch(54.66% 0.186 266.7)
XYZ	xyz(19.4853, 15.4766, 68.9645)
Luminance	0.1548 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3F65DB #DBB53F

analogous

#3FB3DB #3F65DB #673FDB

triadic

#3F65DB #DB3F65 #65DB3F

tetradic

#3F65DB #DB3FB3 #DBB53F #3FDB67

square

#3F65DB #DB3FB3 #DBB53F #3FDB67

split-complementary

#3F65DB #DB673F #B3DB3F

monochromatic

#193486 #2348BA #3F65DB #738EE5 #A6B8EE

Accessibility & contrast

On white

5.13

#3F65DB on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.10

#3F65DB on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3F65DB

5.13:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F65DB	#FFFFFF	#000000	##FFFFFF
##3F65DB	1.00	5.13	4.10	5.13
#FFFFFF	5.13	1.00	21.00	1.00
#000000	4.10	21.00	1.00	21.00
##FFFFFF	5.13	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0075DF

Deuteranopia (green-blind)

#0067D9

Tritanopia (blue-blind)

#008296

Achromatopsia (no color)

#6E6E6E

Design tokens & code

CSS

--color: #3f65db;
/* rgb */ color: rgb(63, 101, 219);
/* oklch */ color: oklch(54.7% 0.186 266.7);

Tailwind

colors: {
  custom: {
    50: '#8790e7',
    500: '#3f65db',
    950: '#000000',
  },
}

SCSS

$custom: #3f65db;
$custom-light: #8790e7;
$custom-dark: #000000;

JSON

{
  "hex": "#3f65db",
  "rgb": {
    "r": 63,
    "g": 101,
    "b": 219
  },
  "hsl": {
    "h": 225.385,
    "s": 68.421,
    "l": 55.294
  },
  "oklch": {
    "l": 0.54658,
    "c": 0.18567,
    "h": 266.7
  },
  "luminance": 0.15479
}

Semantic roles & 50–950 ramp

primary

#3F65DB

secondary

#DCCC9A

accent

#C13DEB

background

#F9F8FE

surface

#F1F0FC

border

#CBCBD5

text

#0D0C16

muted

#7E7D84

Preview Lab

Preview with #3F65DB

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

Preview Lab → · Contrast checker → · Palette generator →