#2821B3#2821B3

#2821B3 is a dark, highly saturated blue. Relative luminance 0.048; OKLCH L 38.6% C 0.215 H 272.0°. Best body text is #FFFFFF at 10.72:1 contrast (WCAG AA passes).

Color values

HEX	#2821B3
RGB	rgb(40, 33, 179)
HSL	hsl(243, 69%, 42%)
HSV	hsv(243, 82%, 70%)
CMYK	cmyk(77.7%, 81.6%, 0%, 29.8%)
CIE-LAB	lab(26.14, 50.85, -74.16)
CIE-LCH	lch(26.14, 89.92, 304.44°)
OKLab	oklab(38.56% 0.0076 -0.2146)
OKLCH	oklch(38.56% 0.215 272)
XYZ	xyz(9.5529, 4.7925, 43.0607)
Luminance	0.0479 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#2821B3 #ACB321

analogous

#2163B3 #2821B3 #7121B3

triadic

#2821B3 #B32821 #21B328

tetradic

#2821B3 #B32163 #ACB321 #21B371

square

#2821B3 #B32163 #ACB321 #21B371

split-complementary

#2821B3 #B37121 #63B321

monochromatic

#110E4C #1C177F #2821B3 #3F37DA #716BE4

Accessibility & contrast

On white

10.72

#2821B3 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.96

#2821B3 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #2821B3

10.72:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##2821B3	#FFFFFF	#000000	##FFFFFF
##2821B3	1.00	10.72	1.96	10.72
#FFFFFF	10.72	1.00	21.00	1.00
#000000	1.96	21.00	1.00	21.00
##FFFFFF	10.72	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0045B7

Deuteranopia (green-blind)

#0037B1

Tritanopia (blue-blind)

#004F6B

Achromatopsia (no color)

#3E3E3E

Design tokens & code

CSS

--color: #2821b3;
/* rgb */ color: rgb(40, 33, 179);
/* oklch */ color: oklch(38.6% 0.215 272.0);

Tailwind

colors: {
  custom: {
    50: '#7b61cb',
    500: '#2821b3',
    950: '#000000',
  },
}

SCSS

$custom: #2821b3;
$custom-light: #7b61cb;
$custom-dark: #000000;

JSON

{
  "hex": "#2821b3",
  "rgb": {
    "r": 40,
    "g": 33,
    "b": 179
  },
  "hsl": {
    "h": 242.877,
    "s": 68.868,
    "l": 41.569
  },
  "oklch": {
    "l": 0.38556,
    "c": 0.21472,
    "h": 272
  },
  "luminance": 0.04794
}

Semantic roles & 50–950 ramp

primary

#2821B3

secondary

#C5CA66

accent

#EC3CE3

background

#F8F5FC

surface

#EFEAF9

border

#CAC6D2

text

#0B0514

muted

#7C7982

Preview Lab

Preview with #2821B3

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

Preview Lab → · Contrast checker → · Palette generator →