#2821B0#2821B0

#2821B0 is a dark, highly saturated blue. Relative luminance 0.047; OKLCH L 38.2% C 0.211 H 272.3°. Best body text is #FFFFFF at 10.85:1 contrast (WCAG AA passes).

Color values

HEX	#2821B0
RGB	rgb(40, 33, 176)
HSL	hsl(243, 68%, 41%)
HSV	hsv(243, 81%, 69%)
CMYK	cmyk(77.3%, 81.3%, 0%, 31%)
CIE-LAB	lab(25.78, 49.92, -72.95)
CIE-LCH	lch(25.78, 88.40, 304.39°)
OKLab	oklab(38.21% 0.0083 -0.2111)
OKLCH	oklch(38.21% 0.211 272.3)
XYZ	xyz(9.2528, 4.6724, 41.4801)
Luminance	0.0467 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#2821B0 #A9B021

analogous

#2161B0 #2821B0 #6F21B0

triadic

#2821B0 #B02821 #21B028

tetradic

#2821B0 #B02161 #A9B021 #21B06F

square

#2821B0 #B02161 #A9B021 #21B06F

split-complementary

#2821B0 #B06F21 #61B021

monochromatic

#110E49 #1C177C #2821B0 #3D35D9 #6F69E3

Accessibility & contrast

On white

10.85

#2821B0 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.93

#2821B0 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #2821B0

10.85:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##2821B0	#FFFFFF	#000000	##FFFFFF
##2821B0	1.00	10.85	1.93	10.85
#FFFFFF	10.85	1.00	21.00	1.00
#000000	1.93	21.00	1.00	21.00
##FFFFFF	10.85	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0044B4

Deuteranopia (green-blind)

#0036AE

Tritanopia (blue-blind)

#004E69

Achromatopsia (no color)

#3D3D3D

Design tokens & code

CSS

--color: #2821b0;
/* rgb */ color: rgb(40, 33, 176);
/* oklch */ color: oklch(38.2% 0.211 272.3);

Tailwind

colors: {
  custom: {
    50: '#7b60c9',
    500: '#2821b0',
    950: '#000000',
  },
}

SCSS

$custom: #2821b0;
$custom-light: #7b60c9;
$custom-dark: #000000;

JSON

{
  "hex": "#2821b0",
  "rgb": {
    "r": 40,
    "g": 33,
    "b": 176
  },
  "hsl": {
    "h": 242.937,
    "s": 68.421,
    "l": 40.98
  },
  "oklch": {
    "l": 0.38207,
    "c": 0.21126,
    "h": 272.3
  },
  "luminance": 0.04673
}

Semantic roles & 50–950 ramp

primary

#2821B0

secondary

#C4C864

accent

#EB3DE3

background

#F8F5FC

surface

#EFEAF8

border

#CAC6D1

text

#0B0513

muted

#7C7982

Preview Lab

Preview with #2821B0

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

Preview Lab → · Contrast checker → · Palette generator →