So when I use pyplot I know how to use the colours blue and red dots, 'bo' and 'ro' respectively. However I cannot find the respective colour codes for orange, yellow, green, indigo and violet (Yup I'm modelling a rainbow). I have been trying to find these colours over the internet with no luck. Can someone please give me a link to these colour codes or list them here please.
Also I don't want to produce dots but coloured lines.
You can use those color codes, an RGB tuple, or you can also use hex colors, which are very easy and customizable (HTML hex color charts are widely available on the web).
Here's the documentation on the color codes: http://matplotlib.org/api/colors_api.html
What 'bo' and 'ro' actually are are two concatenated strings: a one-character string representing the color plus a one-character string representing the line style, in this case, a dot. See http://matplotlib.org/users/pyplot_tutorial.html, where it explains that if you use 'b-' instead of 'bo', it means a blue line instead of a blue dot.
This means that you can use any of the color codes in the colors api link above, followed by an o. For example, a green dot should be 'go'.
If the one-character strings for colors don't suit your needs, you can follow another format:
plot(x, y, color='green', linestyle='dashed', marker='o').
You can insert color names, hex codes, or RGB tuples in the color field.
You can define only a few built-in colors by a single letter (in your case, 'b' and 'r' specifies the color, 'o' specifies the dot type, not the color). You can plot blue lines using 'b-', dotted blue lines using 'b.-' and so on.
The built-in colors are: b: blue g: green r: red c: cyan m: magenta y: yellow k: black w: white
Every other color can be given through their color codes.
See all color formats in the docs here.
