CSS text color using an HTML tag
<p style='color:#0f0f0f'>Lorem ipsum consectetur adipiscing.</p>
CSS text, background, border color using a class
.text_color{color:#0f0f0f;} /*create a class called text_color*/
.bg_color{background-color:#0f0f0f;}
.border_color{border:2px solid #0f0f0f;}
.text_color_rgb{color:rgb(15,15,15);}
.bg_opacity{background-color:rgba(15,15,15,0.5);}
<div class='text_color'>Lorem ipsum consectetur adipiscing.</p>
/*How to use the class called text_color or use another class name*/
rgba = red, green, blue, alpha where alpha is a number between 0 (Transparent) and 1 (Opaque)