| Title: | Collection of Artistic and Nature-Inspired Color Palettes |
| Version: | 0.4.0 |
| Description: | Offers a variety of color palettes inspired by art, nature, and personal inspirations. Each palette is accompanied by a unique backstory, enriching the understanding and significance of the colors. |
| License: | MIT + file LICENSE |
| Encoding: | UTF-8 |
| RoxygenNote: | 7.3.3 |
| URL: | https://github.com/loukesio/ltc-color-palettes, https://loukesio.github.io/ltc-color-palettes/ |
| BugReports: | https://github.com/loukesio/ltc-color-palettes/issues |
| Imports: | grDevices, ggplot2, ggforce, dplyr, colorspace, crayon |
| Language: | en-US |
| Suggests: | spelling |
| NeedsCompilation: | no |
| Packaged: | 2026-07-19 05:28:35 UTC; theodosiou |
| Author: | Loukas Theodosiou 
[aut, cre] |
| Maintainer: | Loukas Theodosiou <theodosiou@evolbio.mpg.de> |
| Repository: | CRAN |
| Date/Publication: | 2026-07-19 06:10:09 UTC |
Adjust Lightness of Palette Colors
Description
Darken or lighten an entire palette or specific colors within it. Uses the colorspace package for perceptually uniform adjustments.
Usage
adjust_ltc(palette_name, amount = 0, which = NULL)
Arguments
palette_name |
Character or unquoted name. Name of the ltc palette to adjust. |
amount |
Numeric. Amount to adjust lightness (-100 to 100). Negative values darken, positive values lighten. Default is 0 (no change). |
which |
Integer vector. Which colors to adjust (e.g., c(1, 3) for 1st and 3rd). If NULL (default), adjusts all colors. |
Value
A vector of adjusted hex color codes with class "ltc"
Examples
# Darken entire palette
adjust_ltc(alger, amount = -20)
# Lighten entire palette
adjust_ltc("maya", amount = 30)
# Darken only specific colors
adjust_ltc(remains, amount = -25, which = c(2, 4))
Plot a Colour Palette as a Bird
Description
Visualizes a selected colour palette in the form of a bird drawing. Requires at least 5 colors in the palette.
Usage
bird(chrom)
Arguments
chrom |
An ltc palette object |
Value
A ggplot2 object showing a bird drawing using the selected colours.
Examples
# Create a bird visualization
pal <- ltc(paloma)
bird(pal)
Create Custom Palette with Individual Color Adjustments
Description
Apply different lightness adjustments to each color in a palette.
Usage
custom_adjust_ltc(palette_name, adjustments)
Arguments
palette_name |
Character or unquoted name. Name of the ltc palette. |
adjustments |
Numeric vector. Lightness adjustments for each color (-100 to 100). Length must match the palette length. |
Value
A vector of adjusted hex color codes with class "ltc"
Examples
# Different adjustment for each color
custom_adjust_ltc(remains, c(-30, 0, 40, 0))
# Create gradient effect
custom_adjust_ltc("maya", c(-40, -20, 0, 20, 40))
Desaturate Palette Colors
Description
Reduce color saturation (make colors more gray).
Usage
desaturate_ltc(palette_name, amount = 0.5, which = NULL)
Arguments
palette_name |
Character or unquoted name. Name of the ltc palette. |
amount |
Numeric. Desaturation amount (0 to 1). 0 = no change, 1 = completely gray. |
which |
Integer vector. Which colors to desaturate. If NULL (default), affects all colors. |
Value
A vector of desaturated hex color codes with class "ltc"
Examples
# Desaturate entire palette
desaturate_ltc(luminaries, amount = 0.5)
# Desaturate only specific colors
desaturate_ltc("heatmap2", amount = 0.7, which = c(1, 2))
Information about the Colour Palettes
Description
This dataframe contains the backstory or inspiration behind each color palette.
Usage
info
Format
An object of class data.frame with 31 rows and 2 columns.
List of colour palettes
Description
A list containing predefined colour palettes with artistic backstories.
This function provides the desired colour palette by name. You can call it with or without quotes: ltc(paloma) or ltc("paloma")
Usage
palettes
ltc(name, n, type = c("discrete", "continuous"))
Arguments
name |
Character or unquoted name. The name of the desired palette. |
n |
Integer. The number of colors you want from the palette. If omitted, it uses all colors from the palette. |
type |
The type of palette. Either "discrete" or "continuous". |
Format
An object of class list of length 31.
Details
ltc: A Collection of Art-inspired Colour Palettes
This package provides a collection of color palettes inspired by art, nature, and personal preferences. Each palette has a backstory, providing context and meaning to the colors.
Value
A vector of hex color codes with class "ltc"
Examples
# Load a palette (with or without quotes)
ltc(paloma)
ltc("maya")
# Select first 3 colors
ltc(maya, n = 3)
# Generate continuous palette
ltc(remains, n = 10, type = "continuous")
Preview a Palette under Colour Vision Deficiency (CVD)
Description
Simulates how an ltc palette appears to viewers with the three
main types of colour vision deficiency (colour blindness) and shows the
result as rows of swatches. Useful for checking whether a palette stays
distinguishable for colour-blind readers.
The simulation uses colorspace: deuteranopia (green-weak, the most common), protanopia (red-weak) and tritanopia (blue-weak).
Usage
ltc_cvd(name, severity = 1, labels = TRUE)
Arguments
name |
Character or unquoted palette name (e.g. |
severity |
Numeric in |
labels |
Logical. If |
Value
A ggplot2 object: one row of swatches per vision type (Normal, Deuteranopia, Protanopia, Tritanopia).
Examples
ltc_cvd(dora)
ltc_cvd("expevo", severity = 0.6)
Plot a Colour Palette
Description
Visualizes a selected colour palette as a bar of colours.
Usage
## S3 method for class 'ltc'
plot(x, ...)
Arguments
x |
An ltc palette object |
... |
Additional arguments (currently unused). |
Value
A ggplot2 object showing the selected colours.
Examples
# Create and plot a palette
pal <- ltc(paloma)
plot(pal)
Print Method for ltc Objects
Description
Custom print method that displays the palette name followed by hex color codes with actual colors visible in the console.
Usage
## S3 method for class 'ltc'
print(x, ...)
Arguments
x |
An ltc palette object |
... |
Additional arguments (currently unused) |
Value
Invisibly returns the palette object