#3F49DB#3F49DB

#3F49DB is a mid, highly saturated blue. Relative luminance 0.109; OKLCH L 49.6% C 0.218 H 272.3°. Best body text is #FFFFFF at 6.59:1 contrast (WCAG AA passes).

Color values

HEX	#3F49DB
RGB	rgb(63, 73, 219)
HSL	hsl(236, 68%, 55%)
HSV	hsv(236, 71%, 86%)
CMYK	cmyk(71.2%, 66.7%, 0%, 14.1%)
CIE-LAB	lab(39.47, 43.80, -75.49)
CIE-LCH	lch(39.47, 87.27, 300.12°)
OKLab	oklab(49.61% 0.0089 -0.2182)
OKLCH	oklch(49.61% 0.218 272.3)
XYZ	xyz(17.2143, 10.9346, 68.2075)
Luminance	0.1094 (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

#3F49DB #DBD13F

analogous

#3F97DB #3F49DB #833FDB

triadic

#3F49DB #DB3F49 #49DB3F

tetradic

#3F49DB #DB3F97 #DBD13F #3FDB83

square

#3F49DB #DB3F97 #DBD13F #3FDB83

split-complementary

#3F49DB #DB833F #97DB3F

monochromatic

#192086 #232DBA #3F49DB #737AE5 #A6ABEE

Accessibility & contrast

On white

6.59

#3F49DB on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.19

#3F49DB on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3F49DB

6.59:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F49DB	#FFFFFF	#000000	##FFFFFF
##3F49DB	1.00	6.59	3.19	6.59
#FFFFFF	6.59	1.00	21.00	1.00
#000000	3.19	21.00	1.00	21.00
##FFFFFF	6.59	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0064E0

Deuteranopia (green-blind)

#0056D8

Tritanopia (blue-blind)

#00708C

Achromatopsia (no color)

#5D5D5D

Design tokens & code

CSS

--color: #3f49db;
/* rgb */ color: rgb(63, 73, 219);
/* oklch */ color: oklch(49.6% 0.218 272.3);

Tailwind

colors: {
  custom: {
    50: '#897ce7',
    500: '#3f49db',
    950: '#000000',
  },
}

SCSS

$custom: #3f49db;
$custom-light: #897ce7;
$custom-dark: #000000;

JSON

{
  "hex": "#3f49db",
  "rgb": {
    "r": 63,
    "g": 73,
    "b": 219
  },
  "hsl": {
    "h": 236.154,
    "s": 68.421,
    "l": 55.294
  },
  "oklch": {
    "l": 0.49611,
    "c": 0.21842,
    "h": 272.3
  },
  "luminance": 0.10936
}

Semantic roles & 50–950 ramp

primary

#3F49DB

secondary

#DCD79A

accent

#E03DEB

background

#F9F7FE

surface

#F2EEFD

border

#CCC9D5

text

#0D0916

muted

#7E7B84

Preview Lab

Preview with #3F49DB

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

Preview Lab → · Contrast checker → · Palette generator →