#3F50AF#3F50AF

#3F50AF is a mid, vivid blue. Relative luminance 0.099; OKLCH L 47.2% C 0.152 H 271.7°. Best body text is #FFFFFF at 7.05:1 contrast (WCAG AA passes).

Color values

HEX	#3F50AF
RGB	rgb(63, 80, 175)
HSL	hsl(231, 47%, 47%)
HSV	hsv(231, 64%, 69%)
CMYK	cmyk(64%, 54.3%, 0%, 31.4%)
CIE-LAB	lab(37.64, 24.10, -52.86)
CIE-LCH	lch(37.64, 58.10, 294.51°)
OKLab	oklab(47.16% 0.0045 -0.1518)
OKLCH	oklch(47.16% 0.152 271.7)
XYZ	xyz(12.6538, 9.8881, 41.7909)
Luminance	0.0989 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3F50AF #AF9E3F

analogous

#3F88AF #3F50AF #663FAF

triadic

#3F50AF #AF3F50 #50AF3F

tetradic

#3F50AF #AF3F88 #AF9E3F #3FAF66

square

#3F50AF #AF3F88 #AF9E3F #3FAF66

split-complementary

#3F50AF #AF663F #88AF3F

monochromatic

#1F2755 #2F3B82 #3F50AF #6473C7 #919CD7

Accessibility & contrast

On white

7.05

#3F50AF on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.98

#3F50AF on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3F50AF

7.05:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F50AF	#FFFFFF	#000000	##FFFFFF
##3F50AF	1.00	7.05	2.98	7.05
#FFFFFF	7.05	1.00	21.00	1.00
#000000	2.98	21.00	1.00	21.00
##FFFFFF	7.05	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0D5EB2

Deuteranopia (green-blind)

#0054AD

Tritanopia (blue-blind)

#006677

Achromatopsia (no color)

#595959

Design tokens & code

CSS

--color: #3f50af;
/* rgb */ color: rgb(63, 80, 175);
/* oklch */ color: oklch(47.2% 0.152 271.7);

Tailwind

colors: {
  custom: {
    50: '#8080c8',
    500: '#3f50af',
    950: '#000000',
  },
}

SCSS

$custom: #3f50af;
$custom-light: #8080c8;
$custom-dark: #000000;

JSON

{
  "hex": "#3f50af",
  "rgb": {
    "r": 63,
    "g": 80,
    "b": 175
  },
  "hsl": {
    "h": 230.893,
    "s": 47.059,
    "l": 46.667
  },
  "oklch": {
    "l": 0.47163,
    "c": 0.15184,
    "h": 271.7
  },
  "luminance": 0.09889
}

Semantic roles & 50–950 ramp

primary

#3F50AF

secondary

#C3BA87

accent

#C251D7

background

#F8F7FC

surface

#EFEEF8

border

#CAC9D1

text

#0B0A13

muted

#7C7C82

Preview Lab

Preview with #3F50AF

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

Preview Lab → · Contrast checker → · Palette generator →