More than 5 Columns in a Row – with Flexbox easy to create.
Important is that the flex container must be the direct parent of the items.

On this case i gave a Custom Class to the color-section : eight-columns

.eight-columns .entry-content-wrapper.clearfix {
  display: flex !important;
  flex-direction: row;
  flex-wrap: nowrap;
  justify-content: space-between;
  align-items: flex-start;

.eight-columns .entry-content-wrapper .flex_column {
  flex: 0 1 10%;
  margin: 0 !important;