Can anything be done to change the white on grey color scheme in Bookmarks?

Question

I just upgraded my Mac Book Pro to OS X Version 10.9.1. I was horrified when I got a look at what Apple has done to Safari!  I have macular degeneration - which means that my eyesight is slowly fading away.  Bookmarks was especially difficult because all of the bookmrks are shown with a white on grey color scheme.  And when the "new" Apple color schemes are not white on grey - they are grey on white.  I simply can NOT see anything which is white on grey.  OR white on ANY light color.  In order to be able to see anything, I need to have contrast.  For example, as I type on this page, the scroll bar is grey on white.  It has become almost impossible for me to find the scroll bar on most pages.  Previously, my scroll bars where usually bright blue.  I can see bright blue on white - but NOT grey on white.  I can read white letters on BRIGHT or DARK Blue -but NOT light blue. 
Apple has made SO many strides in makes computers accessable to those of us who have no other choice except to deal with disabilities!  Can ANYTHING be done to change the white on grey color scheme which Apple has adopted throughout its system? 
Now, in order to use my Bookmarks, I have to go to my Edit Bookmarks page.  Even that solutation is not all that helplful, because the lettering on the Edit Bookmarks page is so small. 
Also - I discovered that the "new" Mail pages had the same problem.  For the most part, the "innovations" in mail make all of the pages too busy for me to be able to sort my mail or keep track of it in any way.  I had to choose to return to the "classic" mail option to be able to get a reasonable facsimile of being able to handle my E mail accounts! 
And, of course, once again, the scroll bar on my mail accounts is also grey on white - so it takes a lot of searching for me to just find the scroll bar when I need to scroll down in an E mail!
ALSO - I was equally horrified when I discovered that the Upgrade to Version 10.9.1 made it impossible for me to visit some of my favorite music pages - most of which use MIDI files!  I can no longer hear any of my favorite MIDI music pages!  I TUNES, of course, is in love with people like Lady Gaga - the type of performers - and performances - which have no relevance to older Americans. 
I do volunteer work at a local Assisted Living facility and one of the greatest advances we have been able to make with Alzheimers patients is the way in which Senior Citizens respond to music from their time period.  Unfortunately, most of the music which senior citizens prefer to listen to is music which has been preserved in MIDI pages.  A few weeks before I "upgraded" my Mac Book Pro - I could take my computer over to the local Assisted Living Facility and play music from Hymn Time's Cyberhymnal or the Angelwinks tunes - but I can NO longer do that with the current Apple "upgrade" in version 10.9.1 - because the music from those MIDI pages can no longer be heard by anyone!  The page comes up and you can see the writing - but no one can hear any of the music.  We understand that a group in Switzerland has been working on an APP for I Phones which DOES make MIDI files accessable - so surely it should be possible to provide a way for Version 10.9.1 users to listen to MIDI files, such as those provided by Hymn Time's Cyber Hymnal or by Angelwinks! 
You will notice that I changed the font for this to Arial Black - primarily because I could NOT see what I was writing when I first began - because, once again, the color scheme was grey on white. 

Answer 1

Hi Grandma,
18 point Helvetica Bold .
There is an Apple Support Community called Vision:
https://discussions.apple.com/community/accessibility/vision?view=discussions
I shall ask the Moderators (Hosts) to move your discussion to that forum.
Kind regards,
Ian.