Color

#1800A7

Dark vivid cool violet. Nearest reference color: Zaffre.

RGB

0–255

167

CMYK

0–100%

85.63%

100%

34.51%

RGB describes how #1800A7 is represented with light on digital screens. This color combines red 24, green 0 and blue 167.

CMYK describes the same color using the four components commonly used in printing: cyan 85.63%, magenta 100%, yellow 0% and black 34.51%.

HSL values

H 248.62° S 100% L 32.75%

In the HSL color model, #1800A7 has a hue of 248.62°, 100% saturation and 32.75% lightness. The sliders below show where this color sits across each of these three dimensions.

Color insight

#1800A7 is a dark, cool violet with vivid chroma.

Temperature: Cool
Lightness: Dark
Chroma: Vivid

Color formats

Copy #1800A7 in a format ready to use in CSS, design tools or other applications.

HEX #1800A7

RGB rgb(24, 0, 167)

HSL hsl(248.62 100% 32.75%)

OKLCH oklch(0.336834 0.222942 268.8919)

CSS --color: #1800A7;

Tints of #1800A7

Tints are lighter variations of #1800A7. They keep the character of the original color while moving progressively toward a lighter appearance.

#E8EEFF #A2BAFF #5F82FF #3249DC #1800A7

Shades of #1800A7

Shades are darker variations of #1800A7. Moving toward black increases visual depth while preserving the underlying hue of the color.

#1800A7 #110083 #090061 #040041 #010024

Tones of #1800A7

Tones reduce the chroma of #1800A7, producing quieter and more muted variations without simply making the color lighter or darker.

#1800A7 #18228F #1D2E78 #263461 #303749

Tonal range of #1800A7

A continuous light-to-dark scale places #1800A7 between its lighter tints and deeper shades.

#E8EEFF #A2BAFF #5F82FF #3249DC #1800A7 #110083 #090061 #040041 #010024

CSS color scale

Use this tonal range as reusable CSS custom properties.

:root {
    --color-100: #E8EEFF;
    --color-200: #A2BAFF;
    --color-300: #5F82FF;
    --color-400: #3249DC;
    --color-500: #1800A7;
    --color-600: #110083;
    --color-700: #090061;
    --color-800: #040041;
    --color-900: #010024;
}

Colors that go with #1800A7

Color harmonies for #1800A7 are generated by rotating its hue in the OKLCH color space while preserving its lightness and chroma. This creates classic complementary, analogous, triadic and other hue relationships with more consistent perceptual balance.

Complementary

Opposite on the color wheel, creating the strongest direct hue contrast.

#1800A7 #453500

Analogous

Neighboring hues that stay visually close to the original color.

#003B5A #1800A7 #480084

Triadic

Three evenly spaced hues that create a broader, balanced color relationship.

#1800A7 #6D0001 #004418

Split complementary

Two hues around the complementary color, providing contrast with more variation.

#1800A7 #542B00 #333C00

Tetradic

Four related hues forming two complementary pairs on the color wheel.

#1800A7 #690036 #453500 #004138

CSS gradients with #1800A7

These gradients show how #1800A7 moves toward white, black and its complementary color. Each gradient includes ready-to-use CSS that can be copied directly into a project.

Toward white

A light gradient that moves from the original color toward white.

#1800A7 #3E59C2 #7991DA #BAC8EE #FFFFFF

background: linear-gradient(90deg, #1800A7, #3E59C2, #7991DA, #BAC8EE, #FFFFFF);

Toward black

A dark gradient that moves from the original color toward black.

#1800A7 #0D0070 #04003E #000012 #000000

background: linear-gradient(90deg, #1800A7, #0D0070, #04003E, #000012, #000000);

Toward the complementary color

A gradient connecting the original color with its complementary hue.

#1800A7 #003E4F #004138 #1F4100 #453500

background: linear-gradient(90deg, #1800A7, #003E4F, #004138, #1F4100, #453500);

Text contrast and accessibility

Contrast determines how clearly text can be distinguished from #1800A7. The values below compare white and black text using WCAG contrast ratios.

White text

13.15:1

AA normal Pass AA large Pass AAA normal Pass

Black text

1.60:1

AA normal Fail AA large Fail AAA normal Fail

Recommended text color: #FFFFFF . Relative luminance: 0.0298 .

Accessible CSS

Use the recommended text color with #1800A7 as the background.

background-color: #1800A7;
color: #FFFFFF;

Using #1800A7 in design

See how #1800A7 works in a simple interface. The examples below use the color as a background, accent and interface element, with text chosen from its accessibility result.

Background

Paletico Color in context

#1800A7 used as a full background with its recommended text color.

Accent

Accent color

Use #1800A7 to emphasize selected interface elements without filling the entire surface.

Example action

Tonal pair

#A2BAFF

#1800A7

#040041

Colors similar to #1800A7

These nearby colors are generated from perceptual variations of #1800A7, including changes in lightness, chroma and hue.

#232EC2 #0D0073 #171D96 #003278 #2E009C #003C8C #260083

Color vision simulation

The simulations below show mathematical approximations of how #1800A7 may shift under three forms of color vision deficiency. They are simulations, not a diagnosis or an exact representation of any individual person's vision.

Protanopia #0038AB Deuteranopia #0028A5 Tritanopia #004360

Simulation based on the model by Machado, Oliveira and Fernandes (2009), published in IEEE Transactions on Visualization and Computer Graphics. DOI: 10.1109/TVCG.2009.113.

Advanced color values

Beyond RGB, CMYK and HSL, #1800A7 can also be represented in perceptual and device-independent color spaces used in color science and modern design tools.

XYZ

X: 7.3494
Y: 2.9833
Z: 36.7402

CIELAB

L*: 19.9769
a*: 57.9406
b*: -77.2086

OKLab

L: 0.336834
a: -0.004311
b: -0.2229

OKLCH

L: 0.336834
C: 0.222942
H: 268.8919°