If you just change your CSS a little bit like this:
.buttonout button {
background-color: LimeGreen;
color: LavenderBlush;
font-size: 16px;
padding: 10px 24px;
transition-duration: 0.4s;
float: left;
border: 2px solid LavenderBlush;
}
.buttonout button:hover {
background-color: LavenderBlush;
color: LimeGreen;
border: 2px solid LimeGreen;
}
then you can do this for the buttons you want to have that styling:
@@.buttonout;<<button "Test Color">><</button>>@@
That just uses the SugarCube custom style markup to do the equivalent of this:
<span class="buttonout"><<button "Test Color">><</button>></span>
Hope that helps! :-)