#3F5BB7#3F5BB7

#3F5BB7 is a mid, vivid blue. Relative luminance 0.120; OKLCH L 50.0% C 0.149 H 267.9°. Best body text is #FFFFFF at 6.19:1 contrast (WCAG AA passes).

Color values

HEX	#3F5BB7
RGB	rgb(63, 91, 183)
HSL	hsl(226, 49%, 48%)
HSV	hsv(226, 66%, 72%)
CMYK	cmyk(65.6%, 50.3%, 0%, 28.2%)
CIE-LAB	lab(41.15, 19.83, -51.91)
CIE-LCH	lch(41.15, 55.57, 290.90°)
OKLab	oklab(49.99% -0.0053 -0.1488)
OKLCH	oklch(49.99% 0.149 267.9)
XYZ	xyz(14.3353, 11.9565, 46.3429)
Luminance	0.1196 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3F5BB7 #B79B3F

analogous

#3F97B7 #3F5BB7 #5F3FB7

triadic

#3F5BB7 #B73F5B #5BB73F

tetradic

#3F5BB7 #B73F97 #B79B3F #3FB75F

square

#3F5BB7 #B73F97 #B79B3F #3FB75F

split-complementary

#3F5BB7 #B75F3F #97B73F

monochromatic

#202E5C #2F4489 #3F5BB7 #687FCB #96A6DB

Accessibility & contrast

On white

6.19

#3F5BB7 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.39

#3F5BB7 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3F5BB7

6.19:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F5BB7	#FFFFFF	#000000	##FFFFFF
##3F5BB7	1.00	6.19	3.39	6.19
#FFFFFF	6.19	1.00	21.00	1.00
#000000	3.39	21.00	1.00	21.00
##FFFFFF	6.19	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#2767BA

Deuteranopia (green-blind)

#015CB5

Tritanopia (blue-blind)

#007080

Achromatopsia (no color)

#616161

Design tokens & code

CSS

--color: #3f5bb7;
/* rgb */ color: rgb(63, 91, 183);
/* oklch */ color: oklch(50.0% 0.149 267.9);

Tailwind

colors: {
  custom: {
    50: '#8189cd',
    500: '#3f5bb7',
    950: '#000000',
  },
}

SCSS

$custom: #3f5bb7;
$custom-light: #8189cd;
$custom-dark: #000000;

JSON

{
  "hex": "#3f5bb7",
  "rgb": {
    "r": 63,
    "g": 91,
    "b": 183
  },
  "hsl": {
    "h": 226,
    "s": 48.78,
    "l": 48.235
  },
  "oklch": {
    "l": 0.49987,
    "c": 0.14893,
    "h": 267.9
  },
  "luminance": 0.11958
}

Semantic roles & 50–950 ramp

primary

#3F5BB7

secondary

#C6B98B

accent

#B84FD8

background

#F8F8FC

surface

#F0EFF9

border

#CBCAD2

text

#0B0B13

muted

#7C7C82

Preview Lab

Preview with #3F5BB7

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

Preview Lab → · Contrast checker → · Palette generator →