Add additional convience colors
I have just implemented the "basic colours" from:
use types::{Color, ColorComponent};
-/// White color.
-pub const WHITE: Color = [1.0; 4];
/// Black color.
pub const BLACK: Color = [0.0, 0.0, 0.0, 1.0];
+/// Blue color.
+pub const BLUE: Color = [0.0, 0.0, 255.0, 1.0];
+/// Cyan color.
+pub const CYAN: Color = [0.0, 255.0, 255.0, 1.0];
+/// Gray color.
+pub const GRAY: Color = [128.0, 128.0, 128.0, 1.0];
+/// Green color.
+pub const GREEN: Color = [0.0, 128.0, 0.0, 1.0];
+/// Lime color.
+pub const LIME: Color = [0.0, 255.0, 0.0, 1.0];
+/// Magenta color.
+pub const MAGENTA: Color = [255.0, 0.0, 255.0, 1.0];
+/// Maroon color.
+pub const MAROON: Color = [128.0, 0.0, 0.0, 1.0];
+/// Navy color.
+pub const NAVY: Color = [0.0, 0.0, 128.0, 1.0];
+/// Olive color.
+pub const OLIVE: Color = [128.0, 128.0, 0.0, 1.0];
+/// Purple color.
+pub const PURPLE: Color = [128.0, 0.0, 128.0, 1.0];
+/// Red color.
+pub const RED: Color = [255.0, 0.0, 0.0, 1.0];
+/// Silver color.
+pub const SILVER: Color = [192.0, 192.0, 192.0, 1.0];
+/// Teal color.
+pub const TEAL: Color = [0.0, 128.0, 128.0, 1.0];
+/// White color.
+pub const WHITE: Color = [255.0, 255.0, 255.0, 1.0];
+/// Yellow color.
+pub const YELLOW: Color = [255.0, 255.0, 0.0, 1.0];
/// Transparent color.
pub const TRANSPARENT: Color = [0.0; 4];
