CSS text color using an HTML tag
<p style='color:#155f84'>Lorem ipsum consectetur adipiscing.</p>
CSS text, background, border color using a class
.text_color{color:#155f84;} /*create a class called text_color*/
.bg_color{background-color:#155f84;}
.border_color{border:2px solid #155f84;}
.text_color_rgb{color:rgb(21,95,132);}
.bg_opacity{background-color:rgba(21,95,132,0.5);}
<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)