#3F65BA#3F65BA

#3F65BA is a mid, vivid blue. Relative luminance 0.139; OKLCH L 52.3% C 0.141 H 264.0°. Best body text is #FFFFFF at 5.55:1 contrast (WCAG AA passes).

Color values

HEX	#3F65BA
RGB	rgb(63, 101, 186)
HSL	hsl(221, 49%, 49%)
HSV	hsv(221, 66%, 73%)
CMYK	cmyk(66.1%, 45.7%, 0%, 27.1%)
CIE-LAB	lab(44.10, 14.49, -48.92)
CIE-LCH	lch(44.10, 51.02, 286.50°)
OKLab	oklab(52.3% -0.0146 -0.1399)
OKLCH	oklch(52.3% 0.141 264)
XYZ	xyz(15.5634, 13.9078, 48.3091)
Luminance	0.1391 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3F65BA #BA943F

analogous

#3FA3BA #3F65BA #563FBA

triadic

#3F65BA #BA3F65 #65BA3F

tetradic

#3F65BA #BA3FA3 #BA943F #3FBA56

square

#3F65BA #BA3FA3 #BA943F #3FBA56

split-complementary

#3F65BA #BA563F #A3BA3F

monochromatic

#20335F #304C8C #3F65BA #6A88CC #97ADDC

Accessibility & contrast

On white

5.55

#3F65BA on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.78

#3F65BA on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3F65BA

5.55:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F65BA	#FFFFFF	#000000	##FFFFFF
##3F65BA	1.00	5.55	3.78	5.55
#FFFFFF	5.55	1.00	21.00	1.00
#000000	3.78	21.00	1.00	21.00
##FFFFFF	5.55	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#3B6EBD

Deuteranopia (green-blind)

#2563B8

Tritanopia (blue-blind)

#007986

Achromatopsia (no color)

#686868

Design tokens & code

CSS

--color: #3f65ba;
/* rgb */ color: rgb(63, 101, 186);
/* oklch */ color: oklch(52.3% 0.141 264.0);

Tailwind

colors: {
  custom: {
    50: '#8190cf',
    500: '#3f65ba',
    950: '#000000',
  },
}

SCSS

$custom: #3f65ba;
$custom-light: #8190cf;
$custom-dark: #000000;

JSON

{
  "hex": "#3f65ba",
  "rgb": {
    "r": 63,
    "g": 101,
    "b": 186
  },
  "hsl": {
    "h": 221.463,
    "s": 49.398,
    "l": 48.824
  },
  "oklch": {
    "l": 0.52303,
    "c": 0.14064,
    "h": 264
  },
  "luminance": 0.13909
}

Semantic roles & 50–950 ramp

primary

#3F65BA

secondary

#C8B68D

accent

#AE4FD9

background

#F8F8FC

surface

#F0F0F9

border

#CBCBD2

text

#0B0C14

muted

#7C7D82

Preview Lab

Preview with #3F65BA

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

Preview Lab → · Contrast checker → · Palette generator →