Portfolio page logo customization without affecting subpages possible?

Hello there,
by any chance there is a similar solution but for the following,
I have created a Home page based on a Portfolio page where there is a slideshow full bleed,
There it makes sense to have the logo in White, 

but the subpages have a white background, therefore a black logo is necessary there.

I have injected the code above, but it not only affects the Main portfolio page but also the subpages. Anyway to go around this? 
Appreciate the help!

Home with a portfolio page + full bleed slideshow:
https://www.studiohelenaholz.com/home-3
Logo in black disappears.

Porfolio Subpage 

7 minutes ago, NitramHolz said:

Hello there,
by any chance there is a similar solution but for the following,
I have created a Home page based on a Portfolio page where there is a slideshow full bleed,
There it makes sense to have the logo in White, 

but the subpages have a white background, therefore a black logo is necessary there.

I have injected the code above, but it not only affects the Main portfolio page but also the subpages. Anyway to go around this? 
Appreciate the help!

Home with a portfolio page + full bleed slideshow:
https://www.studiohelenaholz.com/home-3
Logo in black disappears.

 

Porfolio Subpage 

Add these code on Custom CSS panel in Website > Utilities > Website Tools > Custom CSS.

#collection-6581c20b2e16065e824a63c5 .header-title-logo img{
    filter: grayscale(1) !important;
}

@Web_Solutions thanks for you suggestion,
I have deleted the previous injected code, replaced the logo for the white version and applied the custom CSS code you have suggested, but the subpages are still featuring the logo in white:

Did I miss a step?

4 minutes ago, NitramHolz said:

I thought you have used black logo. Please replace the previous code with the code below.

.header-title-logo img{
    filter: invert(1)  !important;
}

#collection-6581c20b2e16065e824a63c5 .header-title-logo img {
    filter: grayscale(1) !important;
}

@Web_Solutionssorry about the confusion, it works 🙂
Thanks so much!

@Web_Solutions I Just noticed that on the mobile pages the logo is still white.
Can I do any thing about it?