#3F46E4#3F46E4

#3F46E4 is a mid, highly saturated blue. Relative luminance 0.110; OKLCH L 50.0% C 0.233 H 272.4°. Best body text is #FFFFFF at 6.55:1 contrast (WCAG AA passes).

Color values

HEX	#3F46E4
RGB	rgb(63, 70, 228)
HSL	hsl(237, 75%, 57%)
HSV	hsv(237, 72%, 89%)
CMYK	cmyk(72.4%, 69.3%, 0%, 10.6%)
CIE-LAB	lab(39.64, 48.56, -80.34)
CIE-LCH	lch(39.64, 93.88, 301.15°)
OKLab	oklab(49.99% 0.0096 -0.2324)
OKLCH	oklch(49.99% 0.233 272.4)
XYZ	xyz(18.2389, 11.0366, 74.5528)
Luminance	0.1104 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3F46E4 #E4DD3F

analogous

#3F98E4 #3F46E4 #8B3FE4

triadic

#3F46E4 #E43F46 #46E43F

tetradic

#3F46E4 #E43F98 #E4DD3F #3FE48B

square

#3F46E4 #E43F98 #E4DD3F #3FE48B

split-complementary

#3F46E4 #E48B3F #98E43F

monochromatic

#151A94 #1C24C9 #3F46E4 #757AEC #AAADF3

Accessibility & contrast

On white

6.55

#3F46E4 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.21

#3F46E4 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3F46E4

6.55:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F46E4	#FFFFFF	#000000	##FFFFFF
##3F46E4	1.00	6.55	3.21	6.55
#FFFFFF	6.55	1.00	21.00	1.00
#000000	3.21	21.00	1.00	21.00
##FFFFFF	6.55	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0065E9

Deuteranopia (green-blind)

#0055E1

Tritanopia (blue-blind)

#007290

Achromatopsia (no color)

#5D5D5D

Design tokens & code

CSS

--color: #3f46e4;
/* rgb */ color: rgb(63, 70, 228);
/* oklch */ color: oklch(50.0% 0.233 272.4);

Tailwind

colors: {
  custom: {
    50: '#8b7aee',
    500: '#3f46e4',
    950: '#000000',
  },
}

SCSS

$custom: #3f46e4;
$custom-light: #8b7aee;
$custom-dark: #000000;

JSON

{
  "hex": "#3f46e4",
  "rgb": {
    "r": 63,
    "g": 70,
    "b": 228
  },
  "hsl": {
    "h": 237.455,
    "s": 75.342,
    "l": 57.059
  },
  "oklch": {
    "l": 0.49985,
    "c": 0.23262,
    "h": 272.4
  },
  "luminance": 0.11039
}

Semantic roles & 50–950 ramp

primary

#3F46E4

secondary

#E1DE9E

accent

#EA36F2

background

#F9F7FE

surface

#F2EEFD

border

#CCC9D5

text

#0E0917

muted

#7E7B85

Preview Lab

Preview with #3F46E4

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

Preview Lab → · Contrast checker → · Palette generator →