Hello,
You need to get to the css file of the colour of the template version you are using.
In other words, go to this FTP directory for your website: templates/ja_halite/css/colors/your_template_color.css
(For example I am using the red JA Halite theme so I would go to /templates/ja_halite/css/colors/red.css)
When opened in Notepad (or whatever you use) go down to Line 20 (approximately) to find this:
a.readon {
color: #990000;
}
(The colour here will be different to this one as I have also had to change it for my website)
Simply insert the colour code you wish, save, re-upload and refresh your web page.
I hope this works for you 🙂
edit: You also have to go to templates/ja_halite/css/template.css and find this (somewhere between lines 40-45 near the top):
/* Readon links ---*/
a.readon {
background: url(../images/arrow.png) no-repeat 0px 5px;
color: #990000;
font-weight: none;
padding-left: 12px;
}
and change the colour there too.