#3F37AC#3F37AC

#3F37AC is a dark, vivid blue. Relative luminance 0.068; OKLCH L 42.4% C 0.179 H 278.6°. Best body text is #FFFFFF at 8.92:1 contrast (WCAG AA passes).

Color values

HEX	#3F37AC
RGB	rgb(63, 55, 172)
HSL	hsl(244, 52%, 45%)
HSV	hsv(244, 68%, 67%)
CMYK	cmyk(63.4%, 68%, 0%, 32.5%)
CIE-LAB	lab(31.27, 38.87, -61.45)
CIE-LCH	lch(31.27, 72.71, 302.32°)
OKLab	oklab(42.39% 0.0267 -0.1772)
OKLCH	oklch(42.39% 0.179 278.6)
XYZ	xyz(10.8601, 6.7668, 39.7556)
Luminance	0.0677 (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

#3F37AC #A4AC37

analogous

#3769AC #3F37AC #7A37AC

triadic

#3F37AC #AC3F37 #37AC3F

tetradic

#3F37AC #AC3769 #A4AC37 #37AC7A

square

#3F37AC #AC3769 #A4AC37 #37AC7A

split-complementary

#3F37AC #AC7A37 #69AC37

monochromatic

#1D194F #2E287E #3F37AC #5F57C9 #8B85D8

Accessibility & contrast

On white

8.92

#3F37AC on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.35

#3F37AC on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3F37AC

8.92:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F37AC	#FFFFFF	#000000	##FFFFFF
##3F37AC	1.00	8.92	2.35	8.92
#FFFFFF	8.92	1.00	21.00	1.00
#000000	2.35	21.00	1.00	21.00
##FFFFFF	8.92	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004EB0

Deuteranopia (green-blind)

#0045AA

Tritanopia (blue-blind)

#00566D

Achromatopsia (no color)

#4A4A4A

Design tokens & code

CSS

--color: #3f37ac;
/* rgb */ color: rgb(63, 55, 172);
/* oklch */ color: oklch(42.4% 0.179 278.6);

Tailwind

colors: {
  custom: {
    50: '#816fc6',
    500: '#3f37ac',
    950: '#000000',
  },
}

SCSS

$custom: #3f37ac;
$custom-light: #816fc6;
$custom-dark: #000000;

JSON

{
  "hex": "#3f37ac",
  "rgb": {
    "r": 63,
    "g": 55,
    "b": 172
  },
  "hsl": {
    "h": 244.103,
    "s": 51.542,
    "l": 44.51
  },
  "oklch": {
    "l": 0.4239,
    "c": 0.17916,
    "h": 278.6
  },
  "luminance": 0.06768
}

Semantic roles & 50–950 ramp

primary

#3F37AC

secondary

#BDC27D

accent

#DB4DD1

background

#F8F6FC

surface

#F0ECF8

border

#CBC7D1

text

#0C0713

muted

#7D7A82

Preview Lab

Preview with #3F37AC

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

Preview Lab → · Contrast checker → · Palette generator →