#3F59BB#3F59BB

#3F59BB is a mid, vivid blue. Relative luminance 0.118; OKLCH L 49.9% C 0.157 H 268.9°. Best body text is #FFFFFF at 6.25:1 contrast (WCAG AA passes).

Color values

HEX	#3F59BB
RGB	rgb(63, 89, 187)
HSL	hsl(227, 50%, 49%)
HSV	hsv(227, 66%, 73%)
CMYK	cmyk(66.3%, 52.4%, 0%, 26.7%)
CIE-LAB	lab(40.88, 22.55, -54.69)
CIE-LCH	lch(40.88, 59.16, 292.41°)
OKLab	oklab(49.87% -0.0031 -0.157)
OKLCH	oklch(49.87% 0.157 268.9)
XYZ	xyz(14.5889, 11.7880, 48.5106)
Luminance	0.1179 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3F59BB #BBA13F

analogous

#3F97BB #3F59BB #633FBB

triadic

#3F59BB #BB3F59 #59BB3F

tetradic

#3F59BB #BB3F97 #BBA13F #3FBB63

square

#3F59BB #BB3F97 #BBA13F #3FBB63

split-complementary

#3F59BB #BB633F #97BB3F

monochromatic

#202D5F #30438D #3F59BB #6A7FCD #98A6DC

Accessibility & contrast

On white

6.25

#3F59BB on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.36

#3F59BB on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3F59BB

6.25:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F59BB	#FFFFFF	#000000	##FFFFFF
##3F59BB	1.00	6.25	3.36	6.25
#FFFFFF	6.25	1.00	21.00	1.00
#000000	3.36	21.00	1.00	21.00
##FFFFFF	6.25	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#1B66BE

Deuteranopia (green-blind)

#005BB9

Tritanopia (blue-blind)

#007081

Achromatopsia (no color)

#606060

Design tokens & code

CSS

--color: #3f59bb;
/* rgb */ color: rgb(63, 89, 187);
/* oklch */ color: oklch(49.9% 0.157 268.9);

Tailwind

colors: {
  custom: {
    50: '#8287d0',
    500: '#3f59bb',
    950: '#000000',
  },
}

SCSS

$custom: #3f59bb;
$custom-light: #8287d0;
$custom-dark: #000000;

JSON

{
  "hex": "#3f59bb",
  "rgb": {
    "r": 63,
    "g": 89,
    "b": 187
  },
  "hsl": {
    "h": 227.419,
    "s": 49.6,
    "l": 49.02
  },
  "oklch": {
    "l": 0.49869,
    "c": 0.15705,
    "h": 268.9
  },
  "luminance": 0.11789
}

Semantic roles & 50–950 ramp

primary

#3F59BB

secondary

#C8BC8E

accent

#BC4FD9

background

#F8F8FC

surface

#F0EFF9

border

#CBCAD2

text

#0C0B14

muted

#7D7C82

Preview Lab

Preview with #3F59BB

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

Preview Lab → · Contrast checker → · Palette generator →