#1820A1#1820A1

#1820A1 is a dark, vivid blue. Relative luminance 0.038; OKLCH L 35.5% C 0.199 H 268.4°. Best body text is #FFFFFF at 11.93:1 contrast (WCAG AA passes).

Color values

HEX	#1820A1
RGB	rgb(24, 32, 161)
HSL	hsl(236, 74%, 36%)
HSV	hsv(236, 85%, 63%)
CMYK	cmyk(85.1%, 80.1%, 0%, 36.9%)
CIE-LAB	lab(23.00, 44.68, -68.53)
CIE-LCH	lch(23.00, 81.81, 303.10°)
OKLab	oklab(35.53% -0.0056 -0.1985)
OKLCH	oklch(35.53% 0.199 268.4)
XYZ	xyz(7.3240, 3.7995, 34.0587)
Luminance	0.0380 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1820A1 #A19918

analogous

#1865A1 #1820A1 #5518A1

triadic

#1820A1 #A11820 #20A118

tetradic

#1820A1 #A11865 #A19918 #18A155

square

#1820A1 #A11865 #A19918 #18A155

split-complementary

#1820A1 #A15518 #65A118

monochromatic

#080B36 #10156C #1820A1 #202BD6 #4F57E5

Accessibility & contrast

On white

11.93

#1820A1 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.76

#1820A1 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1820A1

11.93:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1820A1	#FFFFFF	#000000	##FFFFFF
##1820A1	1.00	11.93	1.76	11.93
#FFFFFF	11.93	1.00	21.00	1.00
#000000	1.76	21.00	1.00	21.00
##FFFFFF	11.93	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#003EA5

Deuteranopia (green-blind)

#00309F

Tritanopia (blue-blind)

#004861

Achromatopsia (no color)

#373737

Design tokens & code

CSS

--color: #1820a1;
/* rgb */ color: rgb(24, 32, 161);
/* oklch */ color: oklch(35.5% 0.199 268.4);

Tailwind

colors: {
  custom: {
    50: '#725ebe',
    500: '#1820a1',
    950: '#000000',
  },
}

SCSS

$custom: #1820a1;
$custom-light: #725ebe;
$custom-dark: #000000;

JSON

{
  "hex": "#1820a1",
  "rgb": {
    "r": 24,
    "g": 32,
    "b": 161
  },
  "hsl": {
    "h": 236.496,
    "s": 74.054,
    "l": 36.275
  },
  "oklch": {
    "l": 0.35525,
    "c": 0.19862,
    "h": 268.4
  },
  "luminance": 0.038
}

Semantic roles & 50–950 ramp

primary

#1820A1

secondary

#C7C04E

accent

#E637F1

background

#F7F5FB

surface

#EEE9F7

border

#C9C5D0

text

#0A0412

muted

#7C7981

Preview Lab

Preview with #1820A1

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

Preview Lab → · Contrast checker → · Palette generator →