# Changing color in mathmode in LyX

I know there are \color and \textcolor commands for changing colors in mathmode. However, these commands have two arguments, so when I enter them in LyX, the first argument "swallows" the command and I can't enter the text whose color I want to change.

How do I change color in mathmode within LyX?

• \color only has one argument. – Torbjørn T. Dec 5 '15 at 14:26
• Can you please make a bug report at lyx.org/trac ? I know it takes time, but it would be appreciated if you took the time to help make LyX better. – scottkosty Dec 5 '15 at 17:37
• I think this was previously reported as: lyx.org/trac/ticket/5269 – scottkosty Dec 5 '15 at 19:19

\textcolor{red}{$y=f(x)$}


can also be used inside the math mode.

• Note that this works for LyX if you paste it in all at once. Specifically, copy the LaTeX, start a math inset, paste. – scottkosty Dec 5 '15 at 17:36
• @scottkosty is correct. Instead of copying and pasting each time, I copy and paste \textcolor{#1}{#2} once into a macro with two arguments. If you only need red, make a one argument macro and paste in \textcolor{red}{#1}. – webelo Aug 22 '16 at 21:11

I'm not sure about LyX, but in LaTeX, adding colors in math expressions does work the same way it does in normal text, for example:

$${\color{red} \frac{1}{4}} + {\color{blue} \frac{2}{4}} = {\color{green} \frac{3}{4}}$$


Screenshot:

Might not work in LyX though.