Collections Page – 'Image On Hover + Link Customisation'

Site URL: https://tomato-tuba-tjpr.squarespace.com/landing-test-01

Hey there all,

I've been using squarespace for a while but have a challenging task right now. Few things I would love some help with!

1. On my collections page I am wondering if it is possible on hover of a project link, to have the other project links fade out slightly. I have tried multiple attempts at CSS and custom code to no avail. 
    
2. On the same collections page, when hovering over a project link I am looking to give each link it's own distinctive & individual highlight colour...I am able to give a hover colour across the board for all links on site, but not an individual colour link highlight.

My site is: https://tomato-tuba-tjpr.squarespace.com/landing-test-01

PW: logintest

Thanks so much for your guys help, much appreciated as always =)

Q1. Add to Design > Custom CSS

ul.portfolio-hover-items-list:hover * {
    opacity: 0.5;
}
ul.portfolio-hover-items-list>li:hover * {
    opacity: 1 !important;
}

Q2. It looks like you solved?

Thank you sir – that worked absolutely perfectly for Q1, can't tell you how long I searched for an answer for that – thanks once again!

Q2 – I haven't managed to find a solution yet....I've managed to get a custom colouration for all links, but being able to have for instance:

PROJECT 01 – (red on hover)
PROJECT 02 – (green on hover)
etc....

So yeah – any ideas you might have for that would genuinely be much appreciated sir. 
Thanks a bunch,

S