In physics the shorter wavelength of blue light allows it to be more precisely focussed than red light, so this domain name has scientific sense behind it!
Also, blue has become a popular term in branding with 183 domain name sales including the word blue in just the last year (NameBio data).
BlueFocus would be a nice fit for an optical or laser research group, business, reseller or consultant.
If one interprets blue in a mood sense, the name could apply to music, therapy, etc. while the term focus could refer to education, careers, mindful living, etc.
The name feels fresh and by combining two common words is easily remembered.
The .co has been a well respected general use country code extension for many years. In the past year over 500 domains sales in this extension have been recorded in the NameBio database, with an average price of about $1700.
Don't hesitate to be in touch if you have questions.
Make this domain name yours before it is gone forever.