Poniendo colores en latex.
[tex]\color{blue}\displaystyle\int_{a}^{t}\color{red}\phi(\tau)\color{black}\;d\tau[/tex]
Produce
\( \color{blue}\displaystyle\int_{a}^{t}\color{red}\phi(\tau)\color{black}\;d\tau \)
La flor de la kantuta: [tex]\color{red}\blacksquare\color{yellow}\blacksquare\color{green}\blacksquare[/tex]
Produce \( \color{red}\blacksquare\color{yellow}\blacksquare\color{green}\blacksquare \)
Por favor, por razones de visibilidad, solamente utilizar rojo o azul...