#3F56BB#3F56BB

#3F56BB is a mid, vivid blue. Relative luminance 0.113; OKLCH L 49.3% C 0.161 H 269.9°. Best body text is #FFFFFF at 6.44:1 contrast (WCAG AA passes).

Color values

HEX	#3F56BB
RGB	rgb(63, 86, 187)
HSL	hsl(229, 50%, 49%)
HSV	hsv(229, 66%, 73%)
CMYK	cmyk(66.3%, 54%, 0%, 26.7%)
CIE-LAB	lab(40.08, 24.48, -55.98)
CIE-LCH	lch(40.08, 61.10, 293.62°)
OKLab	oklab(49.27% -0.0003 -0.1609)
OKLCH	oklch(49.27% 0.161 269.9)
XYZ	xyz(14.3443, 11.2989, 48.4290)
Luminance	0.1130 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3F56BB #BBA43F

analogous

#3F94BB #3F56BB #663FBB

triadic

#3F56BB #BB3F56 #56BB3F

tetradic

#3F56BB #BB3F94 #BBA43F #3FBB66

square

#3F56BB #BB3F94 #BBA43F #3FBB66

split-complementary

#3F56BB #BB663F #94BB3F

monochromatic

#202C5F #30418D #3F56BB #6A7DCD #98A5DC

Accessibility & contrast

On white

6.44

#3F56BB on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.26

#3F56BB on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3F56BB

6.44:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F56BB	#FFFFFF	#000000	##FFFFFF
##3F56BB	1.00	6.44	3.26	6.44
#FFFFFF	6.44	1.00	21.00	1.00
#000000	3.26	21.00	1.00	21.00
##FFFFFF	6.44	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0C64BF

Deuteranopia (green-blind)

#0059B9

Tritanopia (blue-blind)

#006E80

Achromatopsia (no color)

#5E5E5E

Design tokens & code

CSS

--color: #3f56bb;
/* rgb */ color: rgb(63, 86, 187);
/* oklch */ color: oklch(49.3% 0.161 269.9);

Tailwind

colors: {
  custom: {
    50: '#8285d0',
    500: '#3f56bb',
    950: '#000000',
  },
}

SCSS

$custom: #3f56bb;
$custom-light: #8285d0;
$custom-dark: #000000;

JSON

{
  "hex": "#3f56bb",
  "rgb": {
    "r": 63,
    "g": 86,
    "b": 187
  },
  "hsl": {
    "h": 228.871,
    "s": 49.6,
    "l": 49.02
  },
  "oklch": {
    "l": 0.49267,
    "c": 0.16086,
    "h": 269.9
  },
  "luminance": 0.113
}

Semantic roles & 50–950 ramp

primary

#3F56BB

secondary

#C8BD8E

accent

#BF4FD9

background

#F8F8FC

surface

#F0EFF9

border

#CBCAD2

text

#0C0B14

muted

#7D7C82

Preview Lab

Preview with #3F56BB

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

Preview Lab → · Contrast checker → · Palette generator →