#3F65BB#3F65BB

#3F65BB is a mid, vivid blue. Relative luminance 0.140; OKLCH L 52.4% C 0.142 H 264.2°. Best body text is #FFFFFF at 5.54:1 contrast (WCAG AA passes).

Color values

HEX	#3F65BB
RGB	rgb(63, 101, 187)
HSL	hsl(222, 50%, 49%)
HSV	hsv(222, 66%, 73%)
CMYK	cmyk(66.3%, 46%, 0%, 26.7%)
CIE-LAB	lab(44.16, 14.85, -49.40)
CIE-LCH	lch(44.16, 51.59, 286.73°)
OKLab	oklab(52.37% -0.0144 -0.1413)
OKLCH	oklch(52.37% 0.142 264.2)
XYZ	xyz(15.6701, 13.9505, 48.8710)
Luminance	0.1395 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3F65BB #BB953F

analogous

#3FA3BB #3F65BB #573FBB

triadic

#3F65BB #BB3F65 #65BB3F

tetradic

#3F65BB #BB3FA3 #BB953F #3FBB57

square

#3F65BB #BB3FA3 #BB953F #3FBB57

split-complementary

#3F65BB #BB573F #A3BB3F

monochromatic

#20345F #304C8D #3F65BB #6A89CD #98ADDC

Accessibility & contrast

On white

5.54

#3F65BB on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.79

#3F65BB on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3F65BB

5.54:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F65BB	#FFFFFF	#000000	##FFFFFF
##3F65BB	1.00	5.54	3.79	5.54
#FFFFFF	5.54	1.00	21.00	1.00
#000000	3.79	21.00	1.00	21.00
##FFFFFF	5.54	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#3A6EBE

Deuteranopia (green-blind)

#2363B9

Tritanopia (blue-blind)

#007987

Achromatopsia (no color)

#686868

Design tokens & code

CSS

--color: #3f65bb;
/* rgb */ color: rgb(63, 101, 187);
/* oklch */ color: oklch(52.4% 0.142 264.2);

Tailwind

colors: {
  custom: {
    50: '#8190d0',
    500: '#3f65bb',
    950: '#000000',
  },
}

SCSS

$custom: #3f65bb;
$custom-light: #8190d0;
$custom-dark: #000000;

JSON

{
  "hex": "#3f65bb",
  "rgb": {
    "r": 63,
    "g": 101,
    "b": 187
  },
  "hsl": {
    "h": 221.613,
    "s": 49.6,
    "l": 49.02
  },
  "oklch": {
    "l": 0.5237,
    "c": 0.14203,
    "h": 264.2
  },
  "luminance": 0.13952
}

Semantic roles & 50–950 ramp

primary

#3F65BB

secondary

#C8B68E

accent

#AF4FD9

background

#F8F8FC

surface

#F0F0F9

border

#CBCBD2

text

#0B0C14

muted

#7C7D82

Preview Lab

Preview with #3F65BB

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

Preview Lab → · Contrast checker → · Palette generator →