diff --git a/jupyterthemes/styles/chesterish.less b/jupyterthemes/styles/chesterish.less
index eae77563..8028ade8 100644
--- a/jupyterthemes/styles/chesterish.less
+++ b/jupyterthemes/styles/chesterish.less
@@ -129,8 +129,6 @@
 @scrollbar-inactive:    #464e60;
 @box-shadow:            #374556;
 @md-header-link:        rgba(0,0,0,.32);
-@nb-name-fg:            @button-bg;
-@nb-name-hover:         @divider;
 
 /* chesterish ansi colors */
 @ansiblack:             #2b303b;
diff --git a/jupyterthemes/styles/grade3.less b/jupyterthemes/styles/grade3.less
index 0dacacb9..545da3dd 100644
--- a/jupyterthemes/styles/grade3.less
+++ b/jupyterthemes/styles/grade3.less
@@ -113,8 +113,6 @@
 @codeblock-bg:          #efefef;
 @codeblock-border:      #E7E7E7;
 @md-header-link:        rgba(0,0,0,.32);
-@nb-name-fg:            @button-bg;
-@nb-name-hover:         @divider;
 
 /* btn, scrollbar and shadow colors */
 @button-bg:             darken(@cc-input-bg, 3%);
diff --git a/jupyterthemes/styles/gruvboxd.less b/jupyterthemes/styles/gruvboxd.less
index 5f84f304..90778e0d 100644
--- a/jupyterthemes/styles/gruvboxd.less
+++ b/jupyterthemes/styles/gruvboxd.less
@@ -144,8 +144,6 @@
 @scrollbar-inactive:    @gruv-base1;
 @box-shadow:            @gray;
 @md-header-link:        rgba(0,0,0,.32);
-@nb-name-fg:            @button-bg;
-@nb-name-hover:         @divider;
 
 /* gruvized ansi colors */
 @ansiblack:             @gruv-base03;
diff --git a/jupyterthemes/styles/gruvboxl.less b/jupyterthemes/styles/gruvboxl.less
index 350d851d..c079ebb3 100644
--- a/jupyterthemes/styles/gruvboxl.less
+++ b/jupyterthemes/styles/gruvboxl.less
@@ -131,8 +131,6 @@
 @codeblock-bg:          lighten(@cc-input-bg, 4%);
 @codeblock-border:      @codeblock-bg;
 @md-header-link:        rgba(0,0,0,.32);
-@nb-name-fg:            @button-bg;
-@nb-name-hover:         @divider;
 
 /* btn, scrollbar and shadow colors */
 @button-bg:             @selected-half;
diff --git a/jupyterthemes/styles/monokai.less b/jupyterthemes/styles/monokai.less
index 707907e3..5e22d36e 100644
--- a/jupyterthemes/styles/monokai.less
+++ b/jupyterthemes/styles/monokai.less
@@ -129,8 +129,6 @@
 @scrollbar-inactive:    #49483E;
 @box-shadow:            #49483E;
 @md-header-link:        rgba(0,0,0,.32);
-@nb-name-fg:            @button-bg;
-@nb-name-hover:         @divider;
 
 /* monokai ansi colors */
 @ansiblack:             #282828;
diff --git a/jupyterthemes/styles/oceans16.less b/jupyterthemes/styles/oceans16.less
index da556678..dbcfaadb 100644
--- a/jupyterthemes/styles/oceans16.less
+++ b/jupyterthemes/styles/oceans16.less
@@ -129,8 +129,6 @@
 @scrollbar-inactive:    #464e60;
 @box-shadow:            #3e4458;
 @md-header-link:        rgba(0,0,0,.32);
-@nb-name-fg:            @button-bg;
-@nb-name-hover:         @divider;
 
 /* oceans16 ansi colors */
 @ansiblack:             #2b303b;
diff --git a/jupyterthemes/styles/onedork.less b/jupyterthemes/styles/onedork.less
index da37811d..0ac438a6 100644
--- a/jupyterthemes/styles/onedork.less
+++ b/jupyterthemes/styles/onedork.less
@@ -129,8 +129,6 @@
 @scrollbar-inactive:    #464e60;
 @box-shadow:            #3e4458;
 @md-header-link:        rgba(0,0,0,.32);
-@nb-name-fg:            @button-bg;
-@nb-name-hover:         @divider;
 
 /* onedork ansi colors */
 @ansiblack:             #2b303b;
diff --git a/jupyterthemes/styles/solarizedd.less b/jupyterthemes/styles/solarizedd.less
index 529bd35f..ca90866e 100644
--- a/jupyterthemes/styles/solarizedd.less
+++ b/jupyterthemes/styles/solarizedd.less
@@ -144,8 +144,6 @@ http://ethanschoonover.com/solarized
 @scrollbar-inactive:    @solar-base1;
 @box-shadow:            #05262f;
 @md-header-link:        rgba(0,0,0,.32);
-@nb-name-fg:            @button-bg;
-@nb-name-hover:         @divider;
 
 /* solarized ansi colors */
 @ansiblack:             @solar-base03;
diff --git a/jupyterthemes/styles/solarizedl.less b/jupyterthemes/styles/solarizedl.less
index 29e94555..a53af7ca 100644
--- a/jupyterthemes/styles/solarizedl.less
+++ b/jupyterthemes/styles/solarizedl.less
@@ -144,8 +144,6 @@ http://ethanschoonover.com/solarized
 @scrollbar-inactive:    @solar-base1;
 @box-shadow:            #e8e0c7;
 @md-header-link:        rgba(0,0,0,.32);
-@nb-name-fg:            @button-bg;
-@nb-name-hover:         @divider;
 
 /* solarized ansi colors */
 @ansiblack:             @solar-base03;