#3F28BB#3F28BB

#3F28BB is a dark, highly saturated blue. Relative luminance 0.062; OKLCH L 41.8% C 0.213 H 279.0°. Best body text is #FFFFFF at 9.41:1 contrast (WCAG AA passes).

Color values

HEX	#3F28BB
RGB	rgb(63, 40, 187)
HSL	hsl(249, 65%, 45%)
HSV	hsv(249, 79%, 73%)
CMYK	cmyk(66.3%, 78.6%, 0%, 26.7%)
CIE-LAB	lab(29.82, 51.78, -72.77)
CIE-LCH	lch(29.82, 89.31, 305.43°)
OKLab	oklab(41.8% 0.0333 -0.2101)
OKLCH	oklch(41.8% 0.213 279)
XYZ	xyz(11.7755, 6.1612, 47.5728)
Luminance	0.0616 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3F28BB #A4BB28

analogous

#285ABB #3F28BB #8928BB

triadic

#3F28BB #BB3F28 #28BB3F

tetradic

#3F28BB #BB285A #A4BB28 #28BB89

square

#3F28BB #BB285A #A4BB28 #28BB89

split-complementary

#3F28BB #BB8928 #5ABB28

monochromatic

#1D1256 #2E1D89 #3F28BB #5F48D8 #8B7BE3

Accessibility & contrast

On white

9.41

#3F28BB on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.23

#3F28BB on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3F28BB

9.41:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F28BB	#FFFFFF	#000000	##FFFFFF
##3F28BB	1.00	9.41	2.23	9.41
#FFFFFF	9.41	1.00	21.00	1.00
#000000	2.23	21.00	1.00	21.00
##FFFFFF	9.41	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004CBF

Deuteranopia (green-blind)

#0040B8

Tritanopia (blue-blind)

#005471

Achromatopsia (no color)

#464646

Design tokens & code

CSS

--color: #3f28bb;
/* rgb */ color: rgb(63, 40, 187);
/* oklch */ color: oklch(41.8% 0.213 279.0);

Tailwind

colors: {
  custom: {
    50: '#8566d1',
    500: '#3f28bb',
    950: '#000000',
  },
}

SCSS

$custom: #3f28bb;
$custom-light: #8566d1;
$custom-dark: #000000;

JSON

{
  "hex": "#3f28bb",
  "rgb": {
    "r": 63,
    "g": 40,
    "b": 187
  },
  "hsl": {
    "h": 249.388,
    "s": 64.758,
    "l": 44.51
  },
  "oklch": {
    "l": 0.41799,
    "c": 0.21277,
    "h": 279
  },
  "luminance": 0.06162
}

Semantic roles & 50–950 ramp

primary

#3F28BB

secondary

#BDCB74

accent

#E840CE

background

#F8F6FD

surface

#F0EBFA

border

#CBC6D3

text

#0D0614

muted

#7D7A83

Preview Lab

Preview with #3F28BB

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

Preview Lab → · Contrast checker → · Palette generator →