shazdeh

This plugin adds an option page where you can add color options and the plugin hooks this elements to the Customizer where your client or theme users can customize the design.
Since 0.2 the custom designed panel to change colors is removed and now design tweaks are done through the WordPress Theme Customizer.

Color Manager

Enable your clients or theme users to easily change the color scheme of your design. With live preview!

George Pattichis

Simple Custom Login Page is a simple but robust plugin to customise the login screen of your WordPress website. You can change the logo, the link and the colors (background, text, links) of the login page to match your brand’s identity.
Considering all the bloated plugins and resource intensive implementations floating around, this lightweight and efficient solution is a must-have for all WordPress users/developers. It is also regularly updated to be compatible with the latest versions of WordPress and PHP.
<h3>Features</h3>
<ul>
<li>You can change login logo image</li>
<li>You can change login logo link</li>
<li>You can change page background color</li>
<li>You can change form background color</li>
<li>You can change label text color</li>
<li>You can change links text color</li>
<li>Changes are also applied to the forgot-password form</li>
<li>Changes are also applied to the notification messages</li>
</ul>

Simple Custom Login Page

A simple, lightweight plugin to easily customise the admin login page with your brand's logo and colors.

Color Manager vs Simple Custom Login Page