Get a Vec of colors (described using rgb crate) from one of the famous ColorBrewer palette.
These color specifications and designs are developed by Cynthia Brewer (http://colorbrewer2.org/).
```rust use colorbrewer::{Palette, get_ramp};
// Use an existing palette from the Palette Enum and the wanted number of colors:
let ramporange = getcolorramp(Palette::Oranges, 3);
asserteq!(
ramp_orange,
Some(
vec![
rgb::RGB { r: 254, g: 230, b: 206},
rgb::RGB { r: 253, g: 174, b: 107},
rgb::RGB { r: 230, g: 85, b: 13},
]
));
// Or match the name of one palette with the corresponding Enum variant // using the 'parse' method of a string: let bluepal: Palette = "Blues".parse().unwrap(); let ramp = getcolorramp(bluepal, 5);
// None is returned if the number is invalid:
let ramp = getcolorramp(Palette::Pastel2, 35);
assert_eq!(ramp, None);
```
Licensed under Apache License, Version 2.0.
colorbrewer JS Object from https://github.com/saikocat/colorbrewer to transform it in nested rust match, wrapped in a function.rustfmt mostly did the rest of the job.