Try by using
border: 1px solid #4682b4;
1px solid #4682b4 site:codecademy.com
you will find a bunch of articles.....
You might also try a refresh Browser
++++ reset of session *****************
As you are manipulating with objects
under certain circumstances you can shoot your Browser in an
Therefor it is of an advantage to know that you have 2 reset facilities:
One is the use of the F5-key which does a refresh Browser
Two, select© your code
Then use the Reset Code button of the course-window,
then paste your code back in.
Always refresh the browser after making corrections:
CTRL f5 ( if on Windows or Linux)
CMD r ( if on a MAC).
CTRL 0 to reset browser zoom