#3F45AF#3F45AF

#3F45AF is a mid, vivid blue. Relative luminance 0.084; OKLCH L 45.1% C 0.166 H 275.1°. Best body text is #FFFFFF at 7.83:1 contrast (WCAG AA passes).

Color values

HEX	#3F45AF
RGB	rgb(63, 69, 175)
HSL	hsl(237, 47%, 47%)
HSV	hsv(237, 64%, 69%)
CMYK	cmyk(64%, 60.6%, 0%, 31.4%)
CIE-LAB	lab(34.82, 31.19, -57.44)
CIE-LCH	lch(34.82, 65.36, 298.50°)
OKLab	oklab(45.06% 0.0147 -0.1654)
OKLCH	oklch(45.06% 0.166 275.1)
XYZ	xyz(11.9133, 8.4072, 41.5441)
Luminance	0.0841 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Blue With A Hint Of Purple

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3F45AF #AFA93F

analogous

#3F7DAF #3F45AF #713FAF

triadic

#3F45AF #AF3F45 #45AF3F

tetradic

#3F45AF #AF3F7D #AFA93F #3FAF71

square

#3F45AF #AF3F7D #AFA93F #3FAF71

split-complementary

#3F45AF #AF713F #7DAF3F

monochromatic

#1F2255 #2F3382 #3F45AF #6469C7 #9195D7

Accessibility & contrast

On white

7.83

#3F45AF on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.68

#3F45AF on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3F45AF

7.83:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F45AF	#FFFFFF	#000000	##FFFFFF
##3F45AF	1.00	7.83	2.68	7.83
#FFFFFF	7.83	1.00	21.00	1.00
#000000	2.68	21.00	1.00	21.00
##FFFFFF	7.83	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0057B2

Deuteranopia (green-blind)

#004DAD

Tritanopia (blue-blind)

#005F73

Achromatopsia (no color)

#525252

Design tokens & code

CSS

--color: #3f45af;
/* rgb */ color: rgb(63, 69, 175);
/* oklch */ color: oklch(45.1% 0.166 275.1);

Tailwind

colors: {
  custom: {
    50: '#8178c8',
    500: '#3f45af',
    950: '#000000',
  },
}

SCSS

$custom: #3f45af;
$custom-light: #8178c8;
$custom-dark: #000000;

JSON

{
  "hex": "#3f45af",
  "rgb": {
    "r": 63,
    "g": 69,
    "b": 175
  },
  "hsl": {
    "h": 236.786,
    "s": 47.059,
    "l": 46.667
  },
  "oklch": {
    "l": 0.45059,
    "c": 0.16601,
    "h": 275.1
  },
  "luminance": 0.08408
}

Semantic roles & 50–950 ramp

primary

#3F45AF

secondary

#C3BF87

accent

#D051D7

background

#F8F7FC

surface

#F0EDF8

border

#CBC8D1

text

#0B0913

muted

#7C7B82

Preview Lab

Preview with #3F45AF

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

Preview Lab → · Contrast checker → · Palette generator →