#3F4DCB#3F4DCB

#3F4DCB is a mid, vivid blue. Relative luminance 0.107; OKLCH L 48.9% C 0.194 H 272.2°. Best body text is #FFFFFF at 6.70:1 contrast (WCAG AA passes).

Color values

HEX	#3F4DCB
RGB	rgb(63, 77, 203)
HSL	hsl(234, 57%, 52%)
HSV	hsv(234, 69%, 80%)
CMYK	cmyk(69%, 62.1%, 0%, 20.4%)
CIE-LAB	lab(39.03, 35.86, -67.00)
CIE-LCH	lch(39.03, 76.00, 298.16°)
OKLab	oklab(48.87% 0.0073 -0.1934)
OKLCH	oklch(48.87% 0.194 272.2)
XYZ	xyz(15.4796, 10.6748, 57.7330)
Luminance	0.1068 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Blue With A Hint Of Purple

#533CC6

ΔE00 5.79

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3F4DCB #CBBD3F

analogous

#3F93CB #3F4DCB #773FCB

triadic

#3F4DCB #CB3F4D #4DCB3F

tetradic

#3F4DCB #CB3F93 #CBBD3F #3FCB77

square

#3F4DCB #CB3F93 #CBBD3F #3FCB77

split-complementary

#3F4DCB #CB773F #93CB3F

monochromatic

#1F2771 #2C37A1 #3F4DCB #6F7AD8 #9FA6E5

Accessibility & contrast

On white

6.70

#3F4DCB on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.14

#3F4DCB on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3F4DCB

6.70:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F4DCB	#FFFFFF	#000000	##FFFFFF
##3F4DCB	1.00	6.70	3.14	6.70
#FFFFFF	6.70	1.00	21.00	1.00
#000000	3.14	21.00	1.00	21.00
##FFFFFF	6.70	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0062CF

Deuteranopia (green-blind)

#0056C9

Tritanopia (blue-blind)

#006D85

Achromatopsia (no color)

#5C5C5C

Design tokens & code

CSS

--color: #3f4dcb;
/* rgb */ color: rgb(63, 77, 203);
/* oklch */ color: oklch(48.9% 0.194 272.2);

Tailwind

colors: {
  custom: {
    50: '#867fdc',
    500: '#3f4dcb',
    950: '#000000',
  },
}

SCSS

$custom: #3f4dcb;
$custom-light: #867fdc;
$custom-dark: #000000;

JSON

{
  "hex": "#3f4dcb",
  "rgb": {
    "r": 63,
    "g": 77,
    "b": 203
  },
  "hsl": {
    "h": 234,
    "s": 57.377,
    "l": 52.157
  },
  "oklch": {
    "l": 0.48867,
    "c": 0.1935,
    "h": 272.2
  },
  "luminance": 0.10676
}

Semantic roles & 50–950 ramp

primary

#3F4DCB

secondary

#D1CB94

accent

#D147E1

background

#F8F7FD

surface

#F0EEFB

border

#CBC9D4

text

#0D0A15

muted

#7D7C83

Preview Lab

Preview with #3F4DCB

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

Preview Lab → · Contrast checker → · Palette generator →