Get and mark elements on a page regarding their color or any other style.

Get-Element-By-Style.js

// Paste that in your Browser console
let allBodyElements  = document.querySelectorAll('body *'),
    thePropertyName  = 'color',
    theExpectedValue = 'rgb(0, 82, 204)';

allBodyElements.forEach(function(el){
    let style = window.getComputedStyle(el);
    if ( style.getPropertyValue(thePropertyName) == theExpectedValue ) {
		    console.log(el);
        el.style.boxShadow = '0 0 0 2px red';
    }
});