Why didn't you answer the questions?
Now we do not know which exact version you are using.
Well, where did you select the variation?
If you set it in "Configuration / Global" you change the colors of the admin theme.
But I do not see an issue if I select a variation in the "Theme options"
Here set to "Purple tentacle"
Colors:
As LimeSurvey is based on bootstrap the colors are mainly taken from there.
E.g. the color of the "Next" button is the color of the bootstrap class "btn-primary".
To overwrite this I advice to investigate the page with a webdevelopment tool (included in each browser).
Then set your desired colors in "custom.css"
Here a small part of one of my extended themes
Code:
.progress-bar {
background-color: #90A4AE;
}
.question-container {
border: 1px solid #263238;
border-radius: 5px;
}
.question-title-container, .question-valid-container {
background-color: #90A4AE;
color: #fff;
border-left: 20px solid #C18D00;
}
.question-title-container {
border-radius: 5px 5px 0px 0px;
}
.answer-container {
background-color: #fff;
border-radius: 0px 0px 5px 5px;
padding-top:1.2em;
padding-bottom:1.2em;
}
.question-help-container {
border-top: 1px solid #B0BEC5;
}
.btn-primary {
background-color: #90A4AE;
border-color: #95A5A6;
}
.btn-primary:hover {
background-color: #78909C;
border-color: #2C3E50;
}
.btn-primary:active,
.btn-primary.active {
background-color: #1A242F;
border-color: #161F29;
}