3- colours - again consistancy is key.
Use complementary colours and generally no more than two main colours + not many shades of same two colours + a dark grey / black
I must re-iterate, i am no designer, these are rules i follow to save creating disasters and keep a professional look. (mine are definitely more on the ‘passable’ end of the scale).
So start with logo colours (you can change these really, so these are you start point).
Your logo according to my photoshop is (the red) colour hex #e21932
Change this bit to that colour:
From there we want a nice contrasting colour for the form button and scatter lightly elsewhere. See http://paletton.com/ (others exist i’m sure - i use this one).
Enter #e21932 as base RGB and select triad or tetrad for complementary contrasting colours (or you might have brand colours to follow).
here is a tetrad from that colour http://paletton.com/palette.php?uid=75z0u0kstt-hBBdmAv0usnxzQiy
This one could be good:
(we want bright for button stand out and fairlly dark as button text will be white (#ffffff). As above use sparingly in a couple of other places (ticks can work) and it will look good - don’t overdo.
For the black we want to match the logo black which according to my photoshop is #231f20.
Use these throughout the page. right now below the fold, you have all kind of things going on - stick to same font, same font sizes, spacing and alignment + same design colours through whole page - and will look good