I was in a maze with lighting-up vivid red and blue colors in the tic-Tac-toe pattern.
There was a portal that took me to the maze in a library.
There was doors that led me to other parts of the maze.
What do you think this could mean?

As with all dreams, it's a reflection of your feelings about what was going on in your life at that time.  Did you check out the meaning of the key symbols in your dream? If not, here are the links to their definitions on this site=>
Maze: dreamdoctor.com/index.php?option=com_dre...ls&id=1237&Itemid=24
Door: dreamdoctor.com/index.php?option=com_dre...ls&id=2080&Itemid=24
Hope it helps.

This is a positive dream. It is about the dreamer’s exploration of his unconscious. 

As per Carl Jung, a maze dream often symbolizes a dream of(what he called) the unconscious.  “The unconscious is often symbolized by corridors, labyrinths, or mazes.” P 171 antilogicalism.com/wp-content/uploads/20...-and-his-symbols.pdf
Thus, a visit to this maze represents a visit to the unconscious. 

The red and blue colors probably refer to the chakras –possibly the first, and the fifth or the sixth.  

The maze is in a library. The library has two possible meanings which are not necessarily mutually exclusive:1.     The library contains the contents of the personal and the collective unconscious.2.     The library contains information about the dreamer’s past lives. The dream may also have a shamanistic meaning. 

Hope this helps and is not too confusing.
Lugus

Dreams are messages from God to the Mind. It can also be an unconscious activity. Both ways of interpreting are valid.


The maze denotes passing through one's life.

In a dream, the color blue represents distress, depression, enmity, or it could mean a calamity. The color red in a dream denotes joy, celebration, spirituality or dominion. Red means the world or material gains. Or vice versa, blue is a positive symbol while red can be a negative symbol. 

Maze to the library represents, ignorance or obscurity to knowledge, house of worship, a mosque, worship or a marketplace. It also represents repentance, guidance, richness, healing, or marriage. 

Other parts of the maze means other possibilities of life. Though it not being that of the knowledgeable library. 

The meaning of your dream is to turn to God and the true religion. To not dwell in life without guidance and to be lost.