Changing the footer colour. Steps or Code?

Good Day,

I am a new poster. I have read some information about posting etiquette and how to write a good post. I may not have gotten everything right, but I think I’ve gotten some things right.

Writing to ask you help about the following:

Changing the footer colour.

I am using WP 3.6.1 (most updated version as of Friday Sept 13, 2013) and Theme Alley’s Thea.

Here is the example of a funky footer colour, The blog is using Thea by Theme Alley, and the person has figured out how to turn the footer into a checkered cloth to highlight the picnic theme.

https://qtpicnic.taliacjohnson.ca/

I am looking for either instructions or step by step what and where to paste code.

I am also wondering about sites where I can find neat footer theme. (Like this table cloth example etc.)

I consulted forums and this thread specifically:

https://en.forums.wordpress.com/topic/change-footer-text-color?replies=17

The concept of CSS is outside my knowledge. I don’t know how to code. These remars were too advanced for me to follow. Hex codes? Yikes!

I moved on to this thread, again beyond my understanding:

https://premium-themes.forums.wordpress.com/topic/change-background-color-of-footer-while-keeping-font-white?replies=10

then this thread:

https://www.ads-software.com/support/topic/change-background-color-header-footer

and this instruction specifically:

write your custom CSS in Appearance->Theme Options->Design Options->Custom CSS input field to hide the Header and Footer pattern. And Save the Changes.

Those instructions hung at Theme Options as it took me to a Theme Alley page and offered paid upgrade themes.

Under Appearances -> Edit Themes

On the right it says, “This child theme inherits templates from a parent theme, Destro.”

On the left it says,

The Thea code currently says:

Thea Stylesheet (style.css)

/*
Theme Name: Thea
Theme URI: https://www.themealley.com/thea/
Description: Child theme of Destro which is a Responsive WordPress magazine theme with 3 home page layouts, 300×250 ads, 125×125 ads, 8 premade (Black, Blue, Red, brown, pink, white and Green) ready to use color schemes/skins, 2 page layouts including a full width page template, featured posts, social icons, twitter updates, threaded comments and widget support.
Version: 1.0.1
Author: ThemeAlley.com
Author URI: https://www.themealley.com/
Template: destro
Tags: black, blue, brown, gray, green, tan, dark, white, two-columns, custom-menu, right-sidebar, fixed-width, flexible-width, custom-background, featured-image-header, sticky-post, theme-options, threaded-comments, featured-images, translation-ready, full-width-template, custom-header, flexible-header
License: GNU General Public License
License URI: license.txt
*/