#3F37C2#3F37C2

#3F37C2 is a dark, highly saturated blue. Relative luminance 0.077; OKLCH L 44.5% C 0.207 H 276.4°. Best body text is #FFFFFF at 8.28:1 contrast (WCAG AA passes).

Color values

HEX	#3F37C2
RGB	rgb(63, 55, 194)
HSL	hsl(243, 56%, 49%)
HSV	hsv(243, 72%, 76%)
CMYK	cmyk(67.5%, 71.6%, 0%, 23.9%)
CIE-LAB	lab(33.31, 46.05, -71.12)
CIE-LCH	lch(33.31, 84.73, 302.92°)
OKLab	oklab(44.48% 0.0232 -0.2055)
OKLCH	oklch(44.48% 0.207 276.4)
XYZ	xyz(13.1505, 7.6830, 51.8184)
Luminance	0.0768 (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

#3F37C2 #BAC237

analogous

#3775C2 #3F37C2 #8537C2

triadic

#3F37C2 #C23F37 #37C23F

tetradic

#3F37C2 #C23775 #BAC237 #37C285

square

#3F37C2 #C23775 #BAC237 #37C285

split-complementary

#3F37C2 #C28537 #75C237

monochromatic

#201C63 #302992 #3F37C2 #6A63D3 #9793E0

Accessibility & contrast

On white

8.28

#3F37C2 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.54

#3F37C2 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3F37C2

8.28:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F37C2	#FFFFFF	#000000	##FFFFFF
##3F37C2	1.00	8.28	2.54	8.28
#FFFFFF	8.28	1.00	21.00	1.00
#000000	2.54	21.00	1.00	21.00
##FFFFFF	8.28	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0054C6

Deuteranopia (green-blind)

#0048BF

Tritanopia (blue-blind)

#005E79

Achromatopsia (no color)

#4E4E4E

Design tokens & code

CSS

--color: #3f37c2;
/* rgb */ color: rgb(63, 55, 194);
/* oklch */ color: oklch(44.5% 0.207 276.4);

Tailwind

colors: {
  custom: {
    50: '#856fd6',
    500: '#3f37c2',
    950: '#000000',
  },
}

SCSS

$custom: #3f37c2;
$custom-light: #856fd6;
$custom-dark: #000000;

JSON

{
  "hex": "#3f37c2",
  "rgb": {
    "r": 63,
    "g": 55,
    "b": 194
  },
  "hsl": {
    "h": 243.453,
    "s": 55.823,
    "l": 48.824
  },
  "oklch": {
    "l": 0.44478,
    "c": 0.20679,
    "h": 276.4
  },
  "luminance": 0.07684
}

Semantic roles & 50–950 ramp

primary

#3F37C2

secondary

#C8CB89

accent

#DF49D6

background

#F8F6FD

surface

#F0ECFA

border

#CBC7D3

text

#0D0714

muted

#7D7A83

Preview Lab

Preview with #3F37C2

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

Preview Lab → · Contrast checker → · Palette generator →