#3821BB#3821BB

#3821BB is a dark, highly saturated blue. Relative luminance 0.055; OKLCH L 40.5% C 0.220 H 276.9°. Best body text is #FFFFFF at 9.98:1 contrast (WCAG AA passes).

Color values

HEX	#3821BB
RGB	rgb(56, 33, 187)
HSL	hsl(249, 70%, 43%)
HSV	hsv(249, 82%, 73%)
CMYK	cmyk(70.1%, 82.4%, 0%, 26.7%)
CIE-LAB	lab(28.16, 54.38, -75.54)
CIE-LCH	lch(28.16, 93.07, 305.75°)
OKLab	oklab(40.51% 0.0265 -0.2183)
OKLCH	oklch(40.51% 0.22 276.9)
XYZ	xyz(11.1415, 5.5153, 47.4815)
Luminance	0.0552 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3821BB #A4BB21

analogous

#2157BB #3821BB #8521BB

triadic

#3821BB #BB3821 #21BB38

tetradic

#3821BB #BB2157 #A4BB21 #21BB85

square

#3821BB #BB2157 #A4BB21 #21BB85

split-complementary

#3821BB #BB8521 #57BB21

monochromatic

#190F53 #281887 #3821BB #543DDD #8271E6

Accessibility & contrast

On white

9.98

#3821BB on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.10

#3821BB on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3821BB

9.98:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3821BB	#FFFFFF	#000000	##FFFFFF
##3821BB	1.00	9.98	2.10	9.98
#FFFFFF	9.98	1.00	21.00	1.00
#000000	2.10	21.00	1.00	21.00
##FFFFFF	9.98	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0049BF

Deuteranopia (green-blind)

#003CB8

Tritanopia (blue-blind)

#005270

Achromatopsia (no color)

#424242

Design tokens & code

CSS

--color: #3821bb;
/* rgb */ color: rgb(56, 33, 187);
/* oklch */ color: oklch(40.5% 0.220 276.9);

Tailwind

colors: {
  custom: {
    50: '#8362d1',
    500: '#3821bb',
    950: '#000000',
  },
}

SCSS

$custom: #3821bb;
$custom-light: #8362d1;
$custom-dark: #000000;

JSON

{
  "hex": "#3821bb",
  "rgb": {
    "r": 56,
    "g": 33,
    "b": 187
  },
  "hsl": {
    "h": 248.961,
    "s": 70,
    "l": 43.137
  },
  "oklch": {
    "l": 0.40507,
    "c": 0.21986,
    "h": 276.9
  },
  "luminance": 0.05516
}

Semantic roles & 50–950 ramp

primary

#3821BB

secondary

#BECC6B

accent

#ED3BD2

background

#F8F6FD

surface

#F0EBFA

border

#CBC6D3

text

#0C0514

muted

#7D7A83

Preview Lab

Preview with #3821BB

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

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