diff --git a/resources/ormc_handout.cls b/resources/ormc_handout.cls
index 6f3b480..f3d6331 100755
--- a/resources/ormc_handout.cls
+++ b/resources/ormc_handout.cls
@@ -326,6 +326,7 @@
 \RequirePackage{tcolorbox} % For solution boxes
 \RequirePackage{hyperref}  % For custom references & clickable links
 \tcbuselibrary{breakable}  % Allows tcolorboxes to break across pages
+\tcbuselibrary{skins}      % Allows additional tcolorbox customization
 \usetikzlibrary{calc}
 
 \RequirePackage[ % Provides \say{} for quoted text.
@@ -353,6 +354,18 @@
 }
 
 
+\definecolor{ored}{HTML}{D62121}
+\definecolor{ogrape}{HTML}{9C36B5}
+\definecolor{ocyan}{HTML}{2288BF}
+\definecolor{oteal}{HTML}{12B886}
+\definecolor{ogreen}{HTML}{37B26D}
+\definecolor{oblue}{HTML}{1C7ED6}
+
+\colorlet{red}{ored}
+\colorlet{green}{ogreen}
+\colorlet{blue}{oblue}
+\colorlet{teal}{oteal}
+\colorlet{cyan}{ocyan}
 
 
 \if@unfinished
@@ -364,11 +377,11 @@
 					anchor=center,
 					draw,
 					below,
-					text=red,
-					draw=red,
+					text=ored,
+					draw=ored,
 					fill=white,
 					inner sep = 2mm,
-					line width = 0.3mm,
+					line width = 0.6mm,
 				] {
 					\textbf{Incomplete Handout:}
 					this handout is not done, it may need edits!
@@ -431,15 +444,35 @@
 \newcommand{\uptitler}[1]{\gdef\@uptitler{#1}}
 
 \newcommand{\@shortwarning}{
-	\begin{tcolorbox}[colback=white, colframe=red]
-		\large\centering\color{red}
+	\begin{tcolorbox}[
+		enhanced,
+		breakable,
+		colback=white,
+		colframe=ored,
+		boxrule=0.6mm,
+		arc=0mm,
+		outer arc=0mm,
+	]
+		\large\centering\color{ored}
 		\textbf{Instructor's Handout} \par
 	\end{tcolorbox}
 }
 
+% digital boxes may look better with:
+%	drop shadow=gray,
+%	smart shadow arc=false
+
 \newcommand{\@longwarning}{
-	\begin{tcolorbox}[colback=white, colframe=red]
-		\color{red}
+	\begin{tcolorbox}[
+		enhanced,
+		breakable,
+		colback=white,
+		colframe=ored,
+		boxrule=0.6mm,
+		arc=0mm,
+		outer arc=0mm,
+	]
+		\color{ored}
 		\begingroup
 			\large\centering
 			\textbf{Instructor's Handout} \par
@@ -636,17 +669,17 @@
 		\def\ORMCbgcolor{#3}
 
 		\begin{tcolorbox}[
+			enhanced,
 			breakable,
 			colback=#3,
 			colframe=#4,
+			colbacktitle=#4,
+			titlerule=0.6mm,
 			title={\textbf{#2}},
-			%toprule = 0.6mm,
-			%bottomrule = 0.6mm,
-			%leftrule = 0.6mm,
-			%rightrule = 0.6mm,
-			%titlerule = 0.6mm,
-			arc=1mm,
-			outer arc = 1mm
+			frame style={draw=none,fill=none},
+			boxrule=0mm, % We need this even with hidden borders for correct spacing
+			arc=0mm,
+			outer arc=0mm
 		]
 		\raggedright
 	} {
@@ -654,11 +687,11 @@
 	}
 }
 
-\@makeORMCbox{examplesolution}{Example Solution}{white}{gray!75!black}
+\@makeORMCbox{examplesolution}{Example Solution}{black!10!white}{black!65!white}
 
 \if@solutions
-	\@makeORMCbox{solution}{Solution}{red!5!white}{red!75!black}
-	\@makeORMCbox{instructornote}{Note for Instructors}{cyan!5!white}{cyan!75!black}
+	\@makeORMCbox{solution}{Solution}{ored!10!white}{ored}
+	\@makeORMCbox{instructornote}{Note for Instructors}{ocyan!10!white}{ocyan}
 \else
 	\excludecomment{solution}
 	\excludecomment{instructornote}