[Accessibility] Solve front page text and color contrast issues

[hostle83]

Describe the bug

There are a lot of color contrast issues on the front page of the DSpace Demo instance.

To Reproduce

Steps to reproduce the behavior:
Go to the DSpace Demo Site and, using a color contrast tool, such as Silktide, check the color contrasts for the text against the image.

Expected behavior

Increase color contrast by blurring the image further, by making it darker, and/or by altering the text (font color, font size, style, etc.)

Related work

Related to #3809

[Andrea-Guevara]

Good afternoon @hostle83! We at Neki-it would like to contribute in some way to solving this problem. We've done some tests and would like to know if this looks good to you. If you'd like to suggest any changes, we'd be happy to help.
We look forward to hearing from you!
We'll be happy to provide a pull with the changes.

[hostle83]

Good afternoon, @Andrea-Guevara!

Thank you very much for your message. This might just be me, but I am unable to see a difference between the image you shared and the screenshot in the initial bug report above.

Would you please be so kind and point me in the right direction here? Thank you!

[Andrea-Guevara]

Good morning @hostle83! I understand, it's a bit hard to tell the difference. We've made a pull available for you to test. If necessary, we're happy to change anything.

If this change still isn't good enough, one thing we could do is increase the font size!

[hostle83]

Hi @Andrea-Guevara, thank you! I was able to check out the PR and test it and it looks much better indeed!

However, I am still receiving color contrast issues when running accessibility checks in Silktide. With your PR, the contrast improves from 3.36:1 to 3.95:1. The goal is to reach 4.5:1.

I use Silktide to get an accurate measure of color contrast. It's a free Chrome extension.
Once you have added it to Chrome and have activated it, click on "Accessibility Checker" --> "Text contrast" to get a detailed overview of text that fails the contrast ratio test.

Please let me know if you have any questions!