#3F4DBF#3F4DBF

#3F4DBF is a mid, vivid blue. Relative luminance 0.101; OKLCH L 47.9% C 0.178 H 272.4°. Best body text is #FFFFFF at 6.94:1 contrast (WCAG AA passes).

Color values

HEX	#3F4DBF
RGB	rgb(63, 77, 191)
HSL	hsl(233, 50%, 50%)
HSV	hsv(233, 67%, 75%)
CMYK	cmyk(67%, 59.7%, 0%, 25.1%)
CIE-LAB	lab(38.07, 31.67, -61.59)
CIE-LCH	lch(38.07, 69.25, 297.22°)
OKLab	oklab(47.86% 0.0076 -0.1775)
OKLCH	oklch(47.86% 0.178 272.4)
XYZ	xyz(14.1046, 10.1248, 50.4911)
Luminance	0.1013 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3F4DBF #BFB13F

analogous

#3F8DBF #3F4DBF #713FBF

triadic

#3F4DBF #BF3F4D #4DBF3F

tetradic

#3F4DBF #BF3F8D #BFB13F #3FBF71

square

#3F4DBF #BF3F8D #BFB13F #3FBF71

split-complementary

#3F4DBF #BF713F #8DBF3F

monochromatic

#212863 #303A91 #3F4DBF #6D77CF #9BA2DE

Accessibility & contrast

On white

6.94

#3F4DBF on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.03

#3F4DBF on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3F4DBF

6.94:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F4DBF	#FFFFFF	#000000	##FFFFFF
##3F4DBF	1.00	6.94	3.03	6.94
#FFFFFF	6.94	1.00	21.00	1.00
#000000	3.03	21.00	1.00	21.00
##FFFFFF	6.94	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0060C3

Deuteranopia (green-blind)

#0054BD

Tritanopia (blue-blind)

#00697E

Achromatopsia (no color)

#5A5A5A

Design tokens & code

CSS

--color: #3f4dbf;
/* rgb */ color: rgb(63, 77, 191);
/* oklch */ color: oklch(47.9% 0.178 272.4);

Tailwind

colors: {
  custom: {
    50: '#837ed3',
    500: '#3f4dbf',
    950: '#000000',
  },
}

SCSS

$custom: #3f4dbf;
$custom-light: #837ed3;
$custom-dark: #000000;

JSON

{
  "hex": "#3f4dbf",
  "rgb": {
    "r": 63,
    "g": 77,
    "b": 191
  },
  "hsl": {
    "h": 233.438,
    "s": 50.394,
    "l": 49.804
  },
  "oklch": {
    "l": 0.47857,
    "c": 0.17762,
    "h": 272.4
  },
  "luminance": 0.10126
}

Semantic roles & 50–950 ramp

primary

#3F4DBF

secondary

#CAC490

accent

#CB4EDA

background

#F8F7FD

surface

#F0EEFA

border

#CBC9D3

text

#0C0A14

muted

#7D7C83

Preview Lab

Preview with #3F4DBF

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

Preview Lab → · Contrast checker → · Palette generator →