#3F46DB#3F46DB

#3F46DB is a mid, highly saturated blue. Relative luminance 0.106; OKLCH L 49.1% C 0.222 H 272.7°. Best body text is #FFFFFF at 6.75:1 contrast (WCAG AA passes).

Color values

HEX	#3F46DB
RGB	rgb(63, 70, 219)
HSL	hsl(237, 68%, 55%)
HSV	hsv(237, 71%, 86%)
CMYK	cmyk(71.2%, 68%, 0%, 14.1%)
CIE-LAB	lab(38.81, 45.58, -76.57)
CIE-LCH	lch(38.81, 89.11, 300.76°)
OKLab	oklab(49.14% 0.0106 -0.2214)
OKLCH	oklch(49.14% 0.222 272.7)
XYZ	xyz(17.0219, 10.5499, 68.1433)
Luminance	0.1055 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Blue With A Hint Of Purple

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3F46DB #DBD43F

analogous

#3F94DB #3F46DB #863FDB

triadic

#3F46DB #DB3F46 #46DB3F

tetradic

#3F46DB #DB3F94 #DBD43F #3FDB86

square

#3F46DB #DB3F94 #DBD43F #3FDB86

split-complementary

#3F46DB #DB863F #94DB3F

monochromatic

#191E86 #232ABA #3F46DB #7378E5 #A6A9EE

Accessibility & contrast

On white

6.75

#3F46DB on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.11

#3F46DB on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3F46DB

6.75:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F46DB	#FFFFFF	#000000	##FFFFFF
##3F46DB	1.00	6.75	3.11	6.75
#FFFFFF	6.75	1.00	21.00	1.00
#000000	3.11	21.00	1.00	21.00
##FFFFFF	6.75	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0063E0

Deuteranopia (green-blind)

#0054D8

Tritanopia (blue-blind)

#006F8B

Achromatopsia (no color)

#5B5B5B

Design tokens & code

CSS

--color: #3f46db;
/* rgb */ color: rgb(63, 70, 219);
/* oklch */ color: oklch(49.1% 0.222 272.7);

Tailwind

colors: {
  custom: {
    50: '#8a7ae7',
    500: '#3f46db',
    950: '#000000',
  },
}

SCSS

$custom: #3f46db;
$custom-light: #8a7ae7;
$custom-dark: #000000;

JSON

{
  "hex": "#3f46db",
  "rgb": {
    "r": 63,
    "g": 70,
    "b": 219
  },
  "hsl": {
    "h": 237.308,
    "s": 68.421,
    "l": 55.294
  },
  "oklch": {
    "l": 0.49135,
    "c": 0.22167,
    "h": 272.7
  },
  "luminance": 0.10552
}

Semantic roles & 50–950 ramp

primary

#3F46DB

secondary

#DCD99A

accent

#E33DEB

background

#F9F7FE

surface

#F2EDFD

border

#CCC8D5

text

#0D0916

muted

#7E7B84

Preview Lab

Preview with #3F46DB

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

Preview Lab → · Contrast checker → · Palette generator →