#3F37D8#3F37D8

#3F37D8 is a mid, highly saturated blue. Relative luminance 0.087; OKLCH L 46.7% C 0.233 H 274.7°. Best body text is #FFFFFF at 7.64:1 contrast (WCAG AA passes).

Color values

HEX	#3F37D8
RGB	rgb(63, 55, 216)
HSL	hsl(243, 67%, 53%)
HSV	hsv(243, 75%, 85%)
CMYK	cmyk(70.8%, 74.5%, 0%, 15.3%)
CIE-LAB	lab(35.49, 53.02, -80.32)
CIE-LCH	lch(35.49, 96.24, 303.43°)
OKLab	oklab(46.67% 0.019 -0.2323)
OKLCH	oklch(46.67% 0.233 274.7)
XYZ	xyz(15.8067, 8.7455, 65.8075)
Luminance	0.0875 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Blurple

#5539CC

ΔE00 2.73

Blue With A Hint Of Purple

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3F37D8 #D0D837

analogous

#3780D8 #3F37D8 #8F37D8

triadic

#3F37D8 #D83F37 #37D83F

tetradic

#3F37D8 #D83780 #D0D837 #37D88F

square

#3F37D8 #D83780 #D0D837 #37D88F

split-complementary

#3F37D8 #D88F37 #80D837

monochromatic

#1D187C #2922B0 #3F37D8 #706AE2 #A19DEC

Accessibility & contrast

On white

7.64

#3F37D8 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.75

#3F37D8 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3F37D8

7.64:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F37D8	#FFFFFF	#000000	##FFFFFF
##3F37D8	1.00	7.64	2.75	7.64
#FFFFFF	7.64	1.00	21.00	1.00
#000000	2.75	21.00	1.00	21.00
##FFFFFF	7.64	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#005BDD

Deuteranopia (green-blind)

#004CD5

Tritanopia (blue-blind)

#006685

Achromatopsia (no color)

#535353

Design tokens & code

CSS

--color: #3f37d8;
/* rgb */ color: rgb(63, 55, 216);
/* oklch */ color: oklch(46.7% 0.233 274.7);

Tailwind

colors: {
  custom: {
    50: '#8a70e5',
    500: '#3f37d8',
    950: '#000000',
  },
}

SCSS

$custom: #3f37d8;
$custom-light: #8a70e5;
$custom-dark: #000000;

JSON

{
  "hex": "#3f37d8",
  "rgb": {
    "r": 63,
    "g": 55,
    "b": 216
  },
  "hsl": {
    "h": 242.981,
    "s": 67.364,
    "l": 53.137
  },
  "oklch": {
    "l": 0.46674,
    "c": 0.23307,
    "h": 274.7
  },
  "luminance": 0.08747
}

Semantic roles & 50–950 ramp

primary

#3F37D8

secondary

#D5D893

accent

#EA3EE2

background

#F9F6FE

surface

#F2ECFC

border

#CCC7D5

text

#0E0816

muted

#7E7B84

Preview Lab

Preview with #3F37D8

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

Preview Lab → · Contrast checker → · Palette generator →