Sudden change in brightness

Hi there,

I'l start from the beginning.

I'm currently a student working on an animation demonstrating some GUI designs for my games design degree. I created the animation in After Effects, however, I ran into issues regarding playback. I managed to work around this by exporting the entire 5 minute animation as still images (18gb worth!). I imported this into Adobe Premier Pro, exported and this fixed the issue i was having previously, but the quality was terrible.

Here is my problem. I'v rendered using various sequence settings but my image comes out rather blurry while the text should be crisp and clear. I found that the AVCHD 1080p30 worked really well in terms of clarity, however, there is one small problem, it plays my animation relatively dull in colour, then at a point it will change to how it's supposed to be. Attached is an example of what I mean. The brighter image is how the whole thing should look, but this only happens about half way through.

Any suggestions?