Question: How can we concatenate an expression value with some string and evaluate the resulting expression?

If we have one object prefix and I wanted to concatenate its value with some string. e.g 

```
{{prefix"Output"}}

```

I would like to first evaluate the prefix value and then concatenate it with the "Output" string. 

So the resulting expression may be something like "UnitOutput" where Unit is the value of the prefix.

Lastly I want the concatenated expression from above to be evaluated as well in that case resulting value will be the value of "UnitOutput".

Answer: 
An easy fix is to use:

```
 .custom-dark{
    color : #30393A !important; // text
    background-color:blue!important; // for bg color
 }

```

This will overide the current css set..

I think its more appropriate to add to style sheet than in the html itself , as its easier for development , modifying and unnecessary bloating
add these line in your style.css under /www/css directory

```
.title.title-center.header-item {
        background-color:#F38023!important; // for bg color
        margin:0px!important;
        margin-left:0px!important;
        color: #ffffff!important;
        width: 100%;
    }

```