Color

#100840

Very dark cool violet. Nearest reference color: Paua.

RGB

0–255

CMYK

0–100%

75%

87.5%

74.9%

RGB describes how #100840 is represented with light on digital screens. This color combines red 16, green 8 and blue 64.

CMYK describes the same color using the four components commonly used in printing: cyan 75%, magenta 87.5%, yellow 0% and black 74.9%.

HSL values

H 248.57° S 77.78% L 14.12%

In the HSL color model, #100840 has a hue of 248.57°, 77.78% saturation and 14.12% lightness. The sliders below show where this color sits across each of these three dimensions.

Color insight

#100840 is a very dark, cool violet with moderate chroma.

Temperature: Cool
Lightness: Very dark
Chroma: Moderate

Color formats

Copy #100840 in a format ready to use in CSS, design tools or other applications.

HEX #100840

RGB rgb(16, 8, 64)

HSL hsl(248.57 77.78% 14.12%)

OKLCH oklch(0.197496 0.098776 278.8745)

CSS --color: #100840;

Tints of #100840

Tints are lighter variations of #100840. They keep the character of the original color while moving progressively toward a lighter appearance.

#EAEDFF #A4ABF0 #6C72B2 #3A3C77 #100840

Shades of #100840

Shades are darker variations of #100840. Moving toward black increases visual depth while preserving the underlying hue of the color.

#100840 #0D033B #0A0034 #06002A #040021

Tones of #100840

Tones reduce the chroma of #100840, producing quieter and more muted variations without simply making the color lighter or darker.

#100840 #100E37 #11112E #121425 #14151C

Tonal range of #100840

A continuous light-to-dark scale places #100840 between its lighter tints and deeper shades.

#EAEDFF #A4ABF0 #6C72B2 #3A3C77 #100840 #0D033B #0A0034 #06002A #040021

CSS color scale

Use this tonal range as reusable CSS custom properties.

:root {
    --color-100: #EAEDFF;
    --color-200: #A4ABF0;
    --color-300: #6C72B2;
    --color-400: #3A3C77;
    --color-500: #100840;
    --color-600: #0D033B;
    --color-700: #0A0034;
    --color-800: #06002A;
    --color-900: #040021;
}

Colors that go with #100840

Color harmonies for #100840 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.

#100840 #1A1500

Analogous

Neighboring hues that stay visually close to the original color.

#00162D #100840 #220136

Triadic

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

#100840 #2C0800 #001B0E

Split complementary

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

#100840 #221100 #0E1A00

Tetradic

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

#100840 #30000E #1A1500 #001A19

CSS gradients with #100840

These gradients show how #100840 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.

#100840 #3F426E #797D9E #BABCCE #FFFFFF

background: linear-gradient(90deg, #100840, #3F426E, #797D9E, #BABCCE, #FFFFFF);

Toward black

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

#100840 #070328 #020113 #000003 #000000

background: linear-gradient(90deg, #100840, #070328, #020113, #000003, #000000);

Toward the complementary color

A gradient connecting the original color with its complementary hue.

#100840 #26032A #2D030F #260D00 #1A1500

background: linear-gradient(90deg, #100840, #26032A, #2D030F, #260D00, #1A1500);

Text contrast and accessibility

Contrast determines how clearly text can be distinguished from #100840. The values below compare white and black text using WCAG contrast ratios.

White text

18.57:1

AA normal Pass AA large Pass AAA normal Pass

Black text

1.13:1

AA normal Fail AA large Fail AAA normal Fail

Recommended text color: #FFFFFF . Relative luminance: 0.0065 .

Accessible CSS

Use the recommended text color with #100840 as the background.

background-color: #100840;
color: #FFFFFF;

Using #100840 in design

See how #100840 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

#100840 used as a full background with its recommended text color.

Accent

Accent color

Use #100840 to emphasize selected interface elements without filling the entire surface.

Example action

Tonal pair

#A4ABF0

#100840

#06002A

Colors similar to #100840

These nearby colors are generated from perceptual variations of #100840, including changes in lightness, chroma and hue.

#201F57 #040020 #110049 #101031 #060C41 #17053E #0D174C #0F002F

Color vision simulation

The simulations below show mathematical approximations of how #100840 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 #001542 Deuteranopia #00113F Tritanopia #001824

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, #100840 can also be represented in perceptual and device-independent color spaces used in color science and modern design tools.

XYZ

X: 1.2256
Y: 0.6539
Z: 4.9111

CIELAB

L*: 5.9066
a*: 22.8247
b*: -33.423

OKLab

L: 0.197496
a: 0.015238
b: -0.097594

OKLCH

L: 0.197496
C: 0.098776
H: 278.8745°