Gan,

As far as I know, SH3D "borrows" colours and fonts from the theme of the operating system. So, if (for example) you have installed a pale blue theme with little contrast, than SH3D will be in pale blue with little contrast.
If, on the other hand, you choose a black and white theme with high contrast, SH3D will show everything in black and white with high contrast.
You may consider experimenting with a different theme.

Hans