Requesting some custom CSS code

Hi Debbie , thanks for sharing your CSS question! Here is the CSS code for those items. I also include a few others that are helpful such as button color and link color.

/* Site header background color */

.site-header {
  background-color: #67b9c0;
}

/* Site header text color */

.site-brand__title>h1 {
  color: #ffffff;
}

/* Icon background color */

.category__icon.-color1 {
    background-color: #67b9c0;
}

.topic__icon-40.-color1 {
  background-color: #67b9c0;
}

.topic__icon.-color1 {
  background-color: #67b9c0;
}

/* Category names */

.idx-category__name {
  color: #67b9c0;
}

.category-name {
  color: #67b9c0;
}

/* Topic titles */

.topic-summary__title {
  color: #67b9c0;
}

/* Link color */

.thm-lnk {
    color: #55999e;
}

.thm-lnk:hover {
    color: #67b9c0;
}

/* Button color */

.btn-primary {
  background-color: #67b9c0;
}

.btn-primary:hover {
  background-color: #55999e;
}