diff --git a/physics/pdf/spin.pdf b/physics/pdf/spin.pdf
index 1f4b3d7..76453c4 100644
Binary files a/physics/pdf/spin.pdf and b/physics/pdf/spin.pdf differ
diff --git a/physics/spin.tex b/physics/spin.tex
index 6052db7..c058bab 100755
--- a/physics/spin.tex
+++ b/physics/spin.tex
@@ -10,7 +10,7 @@
 \usepackage{tkz-euclide}
 \usetkzobj{all}
 %
-\definecolor{space}{HTML}{0A2543}
+\definecolor{space}{HTML}{1F2C4E}
 \definecolor{earth}{HTML}{0089FA}
 \definecolor{moon}{HTML}{AFAFAF}
 %