#3F4DBC#3F4DBC

#3F4DBC is a mid, vivid blue. Relative luminance 0.100; OKLCH L 47.6% C 0.174 H 272.5°. Best body text is #FFFFFF at 7.00:1 contrast (WCAG AA passes).

Color values

HEX	#3F4DBC
RGB	rgb(63, 77, 188)
HSL	hsl(233, 50%, 49%)
HSV	hsv(233, 66%, 74%)
CMYK	cmyk(66.5%, 59%, 0%, 26.3%)
CIE-LAB	lab(37.83, 30.62, -60.21)
CIE-LCH	lch(37.83, 67.55, 296.96°)
OKLab	oklab(47.61% 0.0076 -0.1734)
OKLCH	oklch(47.61% 0.174 272.5)
XYZ	xyz(13.7778, 9.9941, 48.7702)
Luminance	0.0999 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3F4DBC #BCAE3F

analogous

#3F8CBC #3F4DBC #703FBC

triadic

#3F4DBC #BC3F4D #4DBC3F

tetradic

#3F4DBC #BC3F8C #BCAE3F #3FBC70

square

#3F4DBC #BC3F8C #BCAE3F #3FBC70

split-complementary

#3F4DBC #BC703F #8CBC3F

monochromatic

#202760 #303A8E #3F4DBC #6B76CD #99A0DD

Accessibility & contrast

On white

7.00

#3F4DBC on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

3.00

#3F4DBC on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3F4DBC

7.00:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F4DBC	#FFFFFF	#000000	##FFFFFF
##3F4DBC	1.00	7.00	3.00	7.00
#FFFFFF	7.00	1.00	21.00	1.00
#000000	3.00	21.00	1.00	21.00
##FFFFFF	7.00	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#005FC0

Deuteranopia (green-blind)

#0054BA

Tritanopia (blue-blind)

#00687D

Achromatopsia (no color)

#595959

Design tokens & code

CSS

--color: #3f4dbc;
/* rgb */ color: rgb(63, 77, 188);
/* oklch */ color: oklch(47.6% 0.174 272.5);

Tailwind

colors: {
  custom: {
    50: '#837ed1',
    500: '#3f4dbc',
    950: '#000000',
  },
}

SCSS

$custom: #3f4dbc;
$custom-light: #837ed1;
$custom-dark: #000000;

JSON

{
  "hex": "#3f4dbc",
  "rgb": {
    "r": 63,
    "g": 77,
    "b": 188
  },
  "hsl": {
    "h": 233.28,
    "s": 49.801,
    "l": 49.216
  },
  "oklch": {
    "l": 0.4761,
    "c": 0.17359,
    "h": 272.5
  },
  "luminance": 0.09995
}

Semantic roles & 50–950 ramp

primary

#3F4DBC

secondary

#C9C28E

accent

#CA4ED9

background

#F8F7FC

surface

#F0EEF9

border

#CBC9D2

text

#0C0A14

muted

#7D7C82

Preview Lab

Preview with #3F4DBC

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

Preview Lab → · Contrast checker → · Palette generator →