The indicator alizarin was used in a titration reaction. It has two $p{K}_a$ values: $p{K}_{a1}=6\mathrm{.}9$ and $p{K}_{a2}=11\mathrm{.}5.$ The colors of the indicator forms are:

$H_2$ : yellow

$H{I}^{-}$: red

$1^{2-}$: blue

What is the colour of the titration solution if the $pH$ is $12\mathrm{.}7?$

orange

blue

more information is needed

green

yellow

purple

red