#3F48E0#3F48E0

#3F48E0 is a mid, highly saturated blue. Relative luminance 0.111; OKLCH L 49.9% C 0.226 H 272.3°. Best body text is #FFFFFF at 6.53:1 contrast (WCAG AA passes).

Color values

HEX	#3F48E0
RGB	rgb(63, 72, 224)
HSL	hsl(237, 72%, 56%)
HSV	hsv(237, 72%, 88%)
CMYK	cmyk(71.9%, 67.9%, 0%, 12.2%)
CIE-LAB	lab(39.70, 46.07, -77.97)
CIE-LCH	lch(39.70, 90.56, 300.58°)
OKLab	oklab(49.92% 0.0089 -0.2255)
OKLCH	oklch(49.92% 0.226 272.3)
XYZ	xyz(17.8173, 11.0715, 71.7046)
Luminance	0.1107 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3F48E0 #E0D73F

analogous

#3F99E0 #3F48E0 #873FE0

triadic

#3F48E0 #E03F48 #48E03F

tetradic

#3F48E0 #E03F99 #E0D73F #3FE087

square

#3F48E0 #E03F99 #E0D73F #3FE087

split-complementary

#3F48E0 #E0873F #99E03F

monochromatic

#171E8E #1F29C2 #3F48E0 #747AE9 #A8ACF1

Accessibility & contrast

On white

6.53

#3F48E0 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.21

#3F48E0 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3F48E0

6.53:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F48E0	#FFFFFF	#000000	##FFFFFF
##3F48E0	1.00	6.53	3.21	6.53
#FFFFFF	6.53	1.00	21.00	1.00
#000000	3.21	21.00	1.00	21.00
##FFFFFF	6.53	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0065E5

Deuteranopia (green-blind)

#0056DD

Tritanopia (blue-blind)

#00718E

Achromatopsia (no color)

#5E5E5E

Design tokens & code

CSS

--color: #3f48e0;
/* rgb */ color: rgb(63, 72, 224);
/* oklch */ color: oklch(49.9% 0.226 272.3);

Tailwind

colors: {
  custom: {
    50: '#8a7ceb',
    500: '#3f48e0',
    950: '#000000',
  },
}

SCSS

$custom: #3f48e0;
$custom-light: #8a7ceb;
$custom-dark: #000000;

JSON

{
  "hex": "#3f48e0",
  "rgb": {
    "r": 63,
    "g": 72,
    "b": 224
  },
  "hsl": {
    "h": 236.646,
    "s": 72.197,
    "l": 56.275
  },
  "oklch": {
    "l": 0.49915,
    "c": 0.22567,
    "h": 272.3
  },
  "luminance": 0.11073
}

Semantic roles & 50–950 ramp

primary

#3F48E0

secondary

#DFDB9C

accent

#E539EF

background

#F9F7FE

surface

#F2EEFD

border

#CCC9D5

text

#0E0916

muted

#7E7B84

Preview Lab

Preview with #3F48E0

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

Preview Lab → · Contrast checker → · Palette generator →