#3F4DBD#3F4DBD

#3F4DBD is a mid, vivid blue. Relative luminance 0.100; OKLCH L 47.7% C 0.175 H 272.5°. Best body text is #FFFFFF at 6.98:1 contrast (WCAG AA passes).

Color values

HEX	#3F4DBD
RGB	rgb(63, 77, 189)
HSL	hsl(233, 50%, 49%)
HSV	hsv(233, 67%, 74%)
CMYK	cmyk(66.7%, 59.3%, 0%, 25.9%)
CIE-LAB	lab(37.91, 30.97, -60.67)
CIE-LCH	lch(37.91, 68.12, 297.04°)
OKLab	oklab(47.69% 0.0076 -0.1748)
OKLCH	oklch(47.69% 0.175 272.5)
XYZ	xyz(13.8860, 10.0374, 49.3399)
Luminance	0.1004 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3F4DBD #BDAF3F

analogous

#3F8CBD #3F4DBD #703FBD

triadic

#3F4DBD #BD3F4D #4DBD3F

tetradic

#3F4DBD #BD3F8C #BDAF3F #3FBD70

square

#3F4DBD #BD3F8C #BDAF3F #3FBD70

split-complementary

#3F4DBD #BD703F #8CBD3F

monochromatic

#202861 #303A8F #3F4DBD #6B76CE #99A1DD

Accessibility & contrast

On white

6.98

#3F4DBD on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.01

#3F4DBD on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3F4DBD

6.98:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F4DBD	#FFFFFF	#000000	##FFFFFF
##3F4DBD	1.00	6.98	3.01	6.98
#FFFFFF	6.98	1.00	21.00	1.00
#000000	3.01	21.00	1.00	21.00
##FFFFFF	6.98	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#005FC1

Deuteranopia (green-blind)

#0054BB

Tritanopia (blue-blind)

#00697D

Achromatopsia (no color)

#595959

Design tokens & code

CSS

--color: #3f4dbd;
/* rgb */ color: rgb(63, 77, 189);
/* oklch */ color: oklch(47.7% 0.175 272.5);

Tailwind

colors: {
  custom: {
    50: '#837ed2',
    500: '#3f4dbd',
    950: '#000000',
  },
}

SCSS

$custom: #3f4dbd;
$custom-light: #837ed2;
$custom-dark: #000000;

JSON

{
  "hex": "#3f4dbd",
  "rgb": {
    "r": 63,
    "g": 77,
    "b": 189
  },
  "hsl": {
    "h": 233.333,
    "s": 50,
    "l": 49.412
  },
  "oklch": {
    "l": 0.47692,
    "c": 0.17493,
    "h": 272.5
  },
  "luminance": 0.10039
}

Semantic roles & 50–950 ramp

primary

#3F4DBD

secondary

#C9C38F

accent

#CA4EDA

background

#F8F7FD

surface

#F0EEFA

border

#CBC9D3

text

#0C0A14

muted

#7D7C83

Preview Lab

Preview with #3F4DBD

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

Preview Lab → · Contrast checker → · Palette generator →