diff --git a/resources/assets/themes/theme0.less b/resources/assets/themes/theme0.less
index 3e94f738..5028ee9f 100644
--- a/resources/assets/themes/theme0.less
+++ b/resources/assets/themes/theme0.less
@@ -1 +1,2 @@
+// light
 @import "base.less";
\ No newline at end of file
diff --git a/resources/assets/themes/theme1.less b/resources/assets/themes/theme1.less
index d67daab7..e1dfd940 100644
--- a/resources/assets/themes/theme1.less
+++ b/resources/assets/themes/theme1.less
@@ -1,3 +1,4 @@
+// dark
 @import "../../../node_modules/bootstrap/less/variables";
 
 /*
diff --git a/resources/assets/themes/theme10.less b/resources/assets/themes/theme10.less
index 7242df47..8f9fe6d7 100644
--- a/resources/assets/themes/theme10.less
+++ b/resources/assets/themes/theme10.less
@@ -1,3 +1,4 @@
+// cccamp19 green (2019)
 @import "../../../node_modules/bootstrap/less/variables";
 
 /*
diff --git a/resources/assets/themes/theme11.less b/resources/assets/themes/theme11.less
index 0cc9e93d..3526c7a6 100644
--- a/resources/assets/themes/theme11.less
+++ b/resources/assets/themes/theme11.less
@@ -1,3 +1,4 @@
+// high contrast
 @import "../../../node_modules/bootstrap/less/variables";
 
 /*
diff --git a/resources/assets/themes/theme12.less b/resources/assets/themes/theme12.less
index 1ed96a72..81d04e56 100644
--- a/resources/assets/themes/theme12.less
+++ b/resources/assets/themes/theme12.less
@@ -1,3 +1,4 @@
+// 36c3
 @import "../../../node_modules/bootstrap/less/variables";
 
 /*
@@ -198,7 +199,7 @@ THE SOFTWARE.
 //** `<input>` background color
 @input-bg:                       @gray-darker;
 //** `<input disabled>` background color
-@input-bg-disabled:              @gray-lighter;
+@input-bg-disabled:              darken(@gray-dark, 10%);
 
 //** Text color for `<input>`s
 @input-color:                    @text-color;
diff --git a/resources/assets/themes/theme2.less b/resources/assets/themes/theme2.less
index a72576db..26acc1bb 100644
--- a/resources/assets/themes/theme2.less
+++ b/resources/assets/themes/theme2.less
@@ -1,3 +1,4 @@
+// cccamp15
 @import "../../../node_modules/bootstrap/less/variables";
 
 @brand-primary:         #758499;
diff --git a/resources/assets/themes/theme3.less b/resources/assets/themes/theme3.less
index a9d6815d..1a56bc4c 100644
--- a/resources/assets/themes/theme3.less
+++ b/resources/assets/themes/theme3.less
@@ -1,3 +1,4 @@
+// 32c3 (2015)
 @import "../../../node_modules/bootstrap/less/variables";
 
 @brand-primary:         #f19224;
diff --git a/resources/assets/themes/theme4.less b/resources/assets/themes/theme4.less
index d8e0276f..486dc9d0 100644
--- a/resources/assets/themes/theme4.less
+++ b/resources/assets/themes/theme4.less
@@ -1,3 +1,4 @@
+// 33c3 (2016)
 @import "../../../node_modules/bootstrap/less/variables";
 
 /*
@@ -180,7 +181,7 @@ THE SOFTWARE.
 @btn-info-bg:                    @brand-info;
 @btn-info-border:                darken(@btn-default-bg, 10%);
 
-@btn-warning-color:              @btn-default-color;
+@btn-warning-color:              darken(@btn-default-color, 40%);
 @btn-warning-bg:                 @brand-warning;
 @btn-warning-border:             darken(@btn-default-bg, 10%);
 
@@ -506,7 +507,7 @@ THE SOFTWARE.
 @state-info-bg:                  @brand-info;
 @state-info-border:              darken(@state-info-bg, 7%);
 
-@state-warning-text:             #fff;
+@state-warning-text:             darken(@brand-warning, 40%);
 @state-warning-bg:               @brand-warning;
 @state-warning-border:           darken(@state-warning-bg, 3%);
 
diff --git a/resources/assets/themes/theme5.less b/resources/assets/themes/theme5.less
index ec5d0cd9..e09366e7 100644
--- a/resources/assets/themes/theme5.less
+++ b/resources/assets/themes/theme5.less
@@ -1,3 +1,4 @@
+// 34c3 light (2017)
 @import "../../../node_modules/bootstrap/less/variables";
 
 @brand-primary:         rgb(164, 28, 49);
diff --git a/resources/assets/themes/theme6.less b/resources/assets/themes/theme6.less
index ed35c12b..58fecc7d 100644
--- a/resources/assets/themes/theme6.less
+++ b/resources/assets/themes/theme6.less
@@ -1,3 +1,4 @@
+// 34c3 dark (2017)
 @import "../../../node_modules/bootstrap/less/variables";
 
 /*
diff --git a/resources/assets/themes/theme7.less b/resources/assets/themes/theme7.less
index fa01a856..24f3a048 100644
--- a/resources/assets/themes/theme7.less
+++ b/resources/assets/themes/theme7.less
@@ -1,3 +1,4 @@
+// 35c3 dark (2018)
 @import "../../../node_modules/bootstrap/less/variables";
 
 /*
diff --git a/resources/assets/themes/theme8.less b/resources/assets/themes/theme8.less
index f0c42073..435424fc 100644
--- a/resources/assets/themes/theme8.less
+++ b/resources/assets/themes/theme8.less
@@ -1,3 +1,4 @@
+// cccamp19 blue (2019)
 @import "../../../node_modules/bootstrap/less/variables";
 
 /*
diff --git a/resources/assets/themes/theme9.less b/resources/assets/themes/theme9.less
index 12dbb304..4f33798e 100644
--- a/resources/assets/themes/theme9.less
+++ b/resources/assets/themes/theme9.less
@@ -1,3 +1,4 @@
+// cccamp19 yellow (2019)
 @import "../../../node_modules/bootstrap/less/variables";
 
 /*