I'm trying to change the colour temperature to be more towards to blue end but I have not the slightest idea how to do that with reshade. Any help would be appreciated.
Lightroom shader from the qUINT collection
has a slider used exactly to control the temperature of the image.
Download the repository and place both "qUINT_lightroom.fx" and "qUINT_common.fxh" files in your reshade-shaders > Shaders directory.