diff --git a/myst_nb/static/mystnb.css b/myst_nb/static/mystnb.css
index adcbb351..241dd272 100644
--- a/myst_nb/static/mystnb.css
+++ b/myst_nb/static/mystnb.css
@@ -117,7 +117,10 @@ tbody span.pasted-inline img {
 }
 
 /* Font colors for translated ANSI escape sequences
-Color values are adapted from share/jupyter/nbconvert/templates/classic/static/style.css
+Color values are copied from Jupyter Notebook
+https://github.com/jupyter/notebook/blob/52581f8eda9b319eb0390ac77fe5903c38f81e3e/notebook/static/notebook/less/ansicolors.less#L14-L21
+Background colors from
+https://nbsphinx.readthedocs.io/en/latest/code-cells.html#ANSI-Colors
 */
 div.highlight .-Color-Bold {
   font-weight: bold;
@@ -132,7 +135,7 @@ div.highlight .-Color[class*=-Green] {
   color: #00A250
 }
 div.highlight .-Color[class*=-Yellow] {
-  color: yellow
+  color: #DDB62B
 }
 div.highlight .-Color[class*=-Blue] {
   color: #208FFB
@@ -156,7 +159,7 @@ div.highlight .-Color[class*=-BGGreen] {
   background-color: #00A250
 }
 div.highlight .-Color[class*=-BGYellow] {
-  background-color: yellow
+  background-color: #DDB62B
 }
 div.highlight .-Color[class*=-BGBlue] {
   background-color: #208FFB