I'm using the navy-blue skin and the search input text and placeholder are very dark grey and unreadable. I added the following couple of styles to correct it which should be in the stylesheet for all skins

.navy-blue-skin .navbar form .md-form .form-control {
  color: #fff;
}

.navy-blue-skin .navbar form .md-form .form-control::placeholder {
  color: #fff;
}

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