#3F55AD#3F55AD

#3F55AD is a mid, vivid blue. Relative luminance 0.106; OKLCH L 48.0% C 0.142 H 269.8°. Best body text is #FFFFFF at 6.74:1 contrast (WCAG AA passes).

Color values

HEX	#3F55AD
RGB	rgb(63, 85, 173)
HSL	hsl(228, 47%, 46%)
HSV	hsv(228, 64%, 68%)
CMYK	cmyk(63.6%, 50.9%, 0%, 32.2%)
CIE-LAB	lab(38.85, 20.14, -49.73)
CIE-LCH	lch(38.85, 53.66, 292.05°)
OKLab	oklab(48.03% -0.0005 -0.1425)
OKLCH	oklch(48.03% 0.143 269.8)
XYZ	xyz(12.8387, 10.5698, 40.8907)
Luminance	0.1057 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3F55AD #AD973F

analogous

#3F8CAD #3F55AD #603FAD

triadic

#3F55AD #AD3F55 #55AD3F

tetradic

#3F55AD #AD3F8C #AD973F #3FAD60

square

#3F55AD #AD3F8C #AD973F #3FAD60

split-complementary

#3F55AD #AD603F #8CAD3F

monochromatic

#1E2953 #2F3F80 #3F55AD #6377C6 #909ED7

Accessibility & contrast

On white

6.74

#3F55AD on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.11

#3F55AD on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3F55AD

6.74:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F55AD	#FFFFFF	#000000	##FFFFFF
##3F55AD	1.00	6.74	3.11	6.74
#FFFFFF	6.74	1.00	21.00	1.00
#000000	3.11	21.00	1.00	21.00
##FFFFFF	6.74	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#2461B0

Deuteranopia (green-blind)

#0457AB

Tritanopia (blue-blind)

#006979

Achromatopsia (no color)

#5B5B5B

Design tokens & code

CSS

--color: #3f55ad;
/* rgb */ color: rgb(63, 85, 173);
/* oklch */ color: oklch(48.0% 0.142 269.8);

Tailwind

colors: {
  custom: {
    50: '#7f84c6',
    500: '#3f55ad',
    950: '#000000',
  },
}

SCSS

$custom: #3f55ad;
$custom-light: #7f84c6;
$custom-dark: #000000;

JSON

{
  "hex": "#3f55ad",
  "rgb": {
    "r": 63,
    "g": 85,
    "b": 173
  },
  "hsl": {
    "h": 228,
    "s": 46.61,
    "l": 46.275
  },
  "oklch": {
    "l": 0.48029,
    "c": 0.1425,
    "h": 269.8
  },
  "luminance": 0.10571
}

Semantic roles & 50–950 ramp

primary

#3F55AD

secondary

#C2B686

accent

#BC52D6

background

#F8F8FC

surface

#EFEFF8

border

#CACAD1

text

#0B0A13

muted

#7C7C82

Preview Lab

Preview with #3F55AD

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

Preview Lab → · Contrast checker → · Palette generator →