#3F41D9#3F41D9

#3F41D9 is a mid, highly saturated blue. Relative luminance 0.098; OKLCH L 48.2% C 0.224 H 273.5°. Best body text is #FFFFFF at 7.07:1 contrast (WCAG AA passes).

Color values

HEX	#3F41D9
RGB	rgb(63, 65, 217)
HSL	hsl(239, 67%, 55%)
HSV	hsv(239, 71%, 85%)
CMYK	cmyk(71%, 70%, 0%, 14.9%)
CIE-LAB	lab(37.56, 47.82, -77.48)
CIE-LCH	lch(37.56, 91.05, 301.68°)
OKLab	oklab(48.18% 0.0137 -0.224)
OKLCH	oklch(48.18% 0.224 273.5)
XYZ	xyz(16.4604, 9.8455, 66.6651)
Luminance	0.0985 (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

#3F41D9 #D9D73F

analogous

#3F8ED9 #3F41D9 #8A3FD9

triadic

#3F41D9 #D93F41 #41D93F

tetradic

#3F41D9 #D93F8E #D9D73F #3FD98A

square

#3F41D9 #D93F8E #D9D73F #3FD98A

split-complementary

#3F41D9 #D98A3F #8ED93F

monochromatic

#1A1B84 #2426B7 #3F41D9 #7274E3 #A5A6ED

Accessibility & contrast

On white

7.07

#3F41D9 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.97

#3F41D9 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3F41D9

7.07:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F41D9	#FFFFFF	#000000	##FFFFFF
##3F41D9	1.00	7.07	2.97	7.07
#FFFFFF	7.07	1.00	21.00	1.00
#000000	2.97	21.00	1.00	21.00
##FFFFFF	7.07	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0060DE

Deuteranopia (green-blind)

#0051D6

Tritanopia (blue-blind)

#006B88

Achromatopsia (no color)

#585858

Design tokens & code

CSS

--color: #3f41d9;
/* rgb */ color: rgb(63, 65, 217);
/* oklch */ color: oklch(48.2% 0.224 273.5);

Tailwind

colors: {
  custom: {
    50: '#8977e6',
    500: '#3f41d9',
    950: '#000000',
  },
}

SCSS

$custom: #3f41d9;
$custom-light: #8977e6;
$custom-dark: #000000;

JSON

{
  "hex": "#3f41d9",
  "rgb": {
    "r": 63,
    "g": 65,
    "b": 217
  },
  "hsl": {
    "h": 239.221,
    "s": 66.957,
    "l": 54.902
  },
  "oklch": {
    "l": 0.4818,
    "c": 0.22447,
    "h": 273.5
  },
  "luminance": 0.09847
}

Semantic roles & 50–950 ramp

primary

#3F41D9

secondary

#DAD99A

accent

#E83EEA

background

#F9F7FE

surface

#F2EDFD

border

#CCC8D5

text

#0D0916

muted

#7E7B84

Preview Lab

Preview with #3F41D9

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

Preview Lab → · Contrast checker → · Palette generator →