If all ids start with roll
you can try something like this span[id^=roll]
^=
denotes selector start with.
span[id^=roll] {
color: red;
}
<span id="roll1">this is someone </span>
<span id="roll2">this is someone c </span>
<span id="roll3">this is someone b </span>
<span id="roll4">this is someone a </span>
<span id="roll5">this is someone d </span>
<span id="roll6">this is someone e</span>
<span id="roll7">this is someone f</span>
Another approach is to add a wrapper element and target the child elements.
Example
.roll-container > span {
color: blue;
}
<div class="roll-container">
<span id="roll1">this is someone </span>
<span id="roll2">this is someone c </span>
<span id="roll3">this is someone b </span>
<span id="roll4">this is someone a </span>
<span id="roll5">this is someone d </span>
<span id="roll6">this is someone e</span>
<span id="roll7">this is someone f</span>
</div>
how can i provide same color to all these id using a external css
file?
You can also target the ids directly.
#roll1, #roll2, #roll3, #roll4, #roll5, #roll5, #roll6, #roll7 {
color: red;
}