#3F4FA5#3F4FA5

#3F4FA5 is a mid, vivid blue. Relative luminance 0.094; OKLCH L 46.2% C 0.139 H 272.0°. Best body text is #FFFFFF at 7.31:1 contrast (WCAG AA passes).

Color values

HEX	#3F4FA5
RGB	rgb(63, 79, 165)
HSL	hsl(231, 45%, 45%)
HSV	hsv(231, 62%, 65%)
CMYK	cmyk(61.8%, 52.1%, 0%, 35.3%)
CIE-LAB	lab(36.68, 21.21, -48.47)
CIE-LCH	lch(36.68, 52.91, 293.63°)
OKLab	oklab(46.22% 0.0048 -0.1389)
OKLCH	oklch(46.22% 0.139 272)
XYZ	xyz(11.6352, 9.3644, 36.7844)
Luminance	0.0936 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3F4FA5 #A5953F

analogous

#3F82A5 #3F4FA5 #623FA5

triadic

#3F4FA5 #A53F4F #4FA53F

tetradic

#3F4FA5 #A53F82 #A5953F #3FA562

square

#3F4FA5 #A53F82 #A5953F #3FA562

split-complementary

#3F4FA5 #A5623F #82A53F

monochromatic

#1D254C #2E3A79 #3F4FA5 #5F6FC2 #8C97D3

Accessibility & contrast

On white

7.31

#3F4FA5 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.87

#3F4FA5 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3F4FA5

7.31:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F4FA5	#FFFFFF	#000000	##FFFFFF
##3F4FA5	1.00	7.31	2.87	7.31
#FFFFFF	7.31	1.00	21.00	1.00
#000000	2.87	21.00	1.00	21.00
##FFFFFF	7.31	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#1E5BA8

Deuteranopia (green-blind)

#0052A3

Tritanopia (blue-blind)

#006372

Achromatopsia (no color)

#565656

Design tokens & code

CSS

--color: #3f4fa5;
/* rgb */ color: rgb(63, 79, 165);
/* oklch */ color: oklch(46.2% 0.139 272.0);

Tailwind

colors: {
  custom: {
    50: '#7e80c0',
    500: '#3f4fa5',
    950: '#000000',
  },
}

SCSS

$custom: #3f4fa5;
$custom-light: #7e80c0;
$custom-dark: #000000;

JSON

{
  "hex": "#3f4fa5",
  "rgb": {
    "r": 63,
    "g": 79,
    "b": 165
  },
  "hsl": {
    "h": 230.588,
    "s": 44.737,
    "l": 44.706
  },
  "oklch": {
    "l": 0.46215,
    "c": 0.13894,
    "h": 272
  },
  "luminance": 0.09365
}

Semantic roles & 50–950 ramp

primary

#3F4FA5

secondary

#BEB482

accent

#C053D4

background

#F8F7FB

surface

#EFEEF7

border

#CAC9D0

text

#0B0A12

muted

#7C7C81

Preview Lab

Preview with #3F4FA5

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

Preview Lab → · Contrast checker → · Palette generator →