#3F41D8#3F41D8

#3F41D8 is a mid, highly saturated blue. Relative luminance 0.098; OKLCH L 48.1% C 0.223 H 273.6°. Best body text is #FFFFFF at 7.10:1 contrast (WCAG AA passes).

Color values

HEX	#3F41D8
RGB	rgb(63, 65, 216)
HSL	hsl(239, 66%, 55%)
HSV	hsv(239, 71%, 85%)
CMYK	cmyk(70.8%, 69.9%, 0%, 15.3%)
CIE-LAB	lab(37.47, 47.49, -77.06)
CIE-LCH	lch(37.47, 90.52, 301.65°)
OKLab	oklab(48.08% 0.0139 -0.2228)
OKLCH	oklch(48.08% 0.223 273.6)
XYZ	xyz(16.3307, 9.7936, 65.9821)
Luminance	0.0979 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Blue (survey)

#0343DF

ΔE00 3.21

Blue With A Hint Of Purple

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3F41D8 #D8D63F

analogous

#3F8DD8 #3F41D8 #8A3FD8

triadic

#3F41D8 #D83F41 #41D83F

tetradic

#3F41D8 #D83F8D #D8D63F #3FD88A

square

#3F41D8 #D83F8D #D8D63F #3FD88A

split-complementary

#3F41D8 #D88A3F #8DD83F

monochromatic

#1A1C82 #2527B5 #3F41D8 #7273E2 #A5A6ED

Accessibility & contrast

On white

7.10

#3F41D8 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.96

#3F41D8 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3F41D8

7.10:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F41D8	#FFFFFF	#000000	##FFFFFF
##3F41D8	1.00	7.10	2.96	7.10
#FFFFFF	7.10	1.00	21.00	1.00
#000000	2.96	21.00	1.00	21.00
##FFFFFF	7.10	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#005FDD

Deuteranopia (green-blind)

#0051D5

Tritanopia (blue-blind)

#006B88

Achromatopsia (no color)

#585858

Design tokens & code

CSS

--color: #3f41d8;
/* rgb */ color: rgb(63, 65, 216);
/* oklch */ color: oklch(48.1% 0.223 273.6);

Tailwind

colors: {
  custom: {
    50: '#8977e5',
    500: '#3f41d8',
    950: '#000000',
  },
}

SCSS

$custom: #3f41d8;
$custom-light: #8977e5;
$custom-dark: #000000;

JSON

{
  "hex": "#3f41d8",
  "rgb": {
    "r": 63,
    "g": 65,
    "b": 216
  },
  "hsl": {
    "h": 239.216,
    "s": 66.234,
    "l": 54.706
  },
  "oklch": {
    "l": 0.48084,
    "c": 0.22326,
    "h": 273.6
  },
  "luminance": 0.09795
}

Semantic roles & 50–950 ramp

primary

#3F41D8

secondary

#DAD999

accent

#E73FE9

background

#F9F7FE

surface

#F2EDFC

border

#CCC8D5

text

#0D0916

muted

#7E7B84

Preview Lab

Preview with #3F41D8

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

Preview Lab → · Contrast checker → · Palette generator →