I came across the post about blue meaning sarcasm, and googled the meaning of blue writing, and got this:

"Blue signifies the heavens and the kingdom of God not on this earth.
Icons of Mary show her with red outer garments and blue ones on the
inside. This signifies her original human nature (the red) and her heavenly
nature (the blue). "

And

"Blue is the coolest color - the color of the sky, ocean, sleep, twilight. The ancient Egyptians used lapis lazuli to represent heaven. Blue symbolizes the Virgin Mary. A pure blue is the color of inspiration, sincerity and spirituality. Blue is often the chosen color by conservative people. Blue is the calming color. That makes it a wonderful color to use in the home, especially for babies. Blue is so soothing that is a good choice for pajamas. Dark blue is the color of truth and moderation."

Personally, I like blue, and seeing it in any form is calming for me. I guess, it's just a matter of the significance that you as an individual attach to it.

If you feel you want to use blue because it's a good colour that calms. Then, that's what it is to you.