diff --git a/book/book.tex b/book/book.tex
index 3a16bcc..fe6a15e 100644
--- a/book/book.tex
+++ b/book/book.tex
@@ -20,6 +20,8 @@
     allcolors=black
 }
 
+\definecolor{codeblue}{RGB}{69, 161, 248}
+
 \usepackage{tikz}
 \usetikzlibrary{shapes,arrows}
 
@@ -41,9 +43,9 @@
 \advance\cftsubsecnumwidth 0.5em\relax
 
 % Define block styles
-\tikzstyle{decision} = [diamond, draw, fill=blue!20, 
+\tikzstyle{decision} = [diamond, draw, fill=codeblue, text=white,
     text width=4.5em, text badly centered, node distance=3cm, inner sep=0pt]
-\tikzstyle{block} = [rectangle, draw, fill=blue!20, 
+\tikzstyle{block} = [rectangle, draw, fill=codeblue,  text=white,
     text width=5em, text centered, rounded corners, minimum height=4em]
 \tikzstyle{line} = [draw, -latex']
 \tikzstyle{cloud} = [draw, ellipse,fill=red!20, node distance=3cm,
diff --git a/book/sourdough-starter/sourdough-starter.tex b/book/sourdough-starter/sourdough-starter.tex
index 77cfb85..19dd1fa 100644
--- a/book/sourdough-starter/sourdough-starter.tex
+++ b/book/sourdough-starter/sourdough-starter.tex
@@ -135,7 +135,7 @@ be airtight. You still want some gas exchange to be possible.
    	\node [block] (init) {\footnotesize Mix 50g flour + 50g water, stir}; 
 	\node [block, right of=init, node distance=3cm] (wait1) {\footnotesize Wait 24 hours};
 	\path [line] (init) -- (wait1);
-	\node [block, right of=wait1, node distance=3cm] (feed) {\footnotesize 50g of previous day + 50g water + 50g flour, stir};
+	\node [block, right of=wait1, node distance=3cm] (feed) {\footnotesize 10g of previous day + 50g water + 50g flour, stir};
 	\path [line] (wait1) -- (feed);
 	\node [block, below of=feed] (discard) {\footnotesize Discard the rest};
 	\path [line] (feed) -- (discard);