Adjust existing colors to pass tests

A lot of these were taken from official websites. For obscurer
languages, I just changed a few digits of the hex value.

lib/linguist/languages.yml

@@ -46,7 +46,7 @@ AGS Script:
 
 AMPL:
   type: programming
-  color: "#00008B"
+  color: "#5B2E7F"
   extensions:
   - .ampl
   tm_scope: source.ampl
@@ -101,7 +101,7 @@ ATS:
 ActionScript:
   type: programming
   tm_scope: source.actionscript.3
-  color: "#e3491a"
+  color: "#882B0F"
   search_term: as3
   aliases:
   - actionscript 3
@@ -705,7 +705,7 @@ D-ObjDump:
 
 DM:
   type: programming
-  color: "#075ff1"
+  color: "#075bb1"
   extensions:
   - .dm
   aliases:
@@ -895,7 +895,7 @@ F#:
 
 FLUX:
   type: programming
-  color: "#33CCFF"
+  color: "#88ccff"
   extensions:
   - .fx
   - .flux
@@ -1420,7 +1420,7 @@ Ioke:
 
 Isabelle:
   type: programming
-  color: "#fdcd00"
+  color: "#FEFE00"
   extensions:
   - .thy
   tm_scope: source.isabelle.theory
@@ -1556,7 +1556,7 @@ Julia:
 
 KRL:
   type: programming
-  color: "#f5c800"
+  color: "#F89A1C"
   extensions:
   - .krl
   tm_scope: none
@@ -1620,7 +1620,7 @@ LabVIEW:
 
 Lasso:
   type: programming
-  color: "#2584c3"
+  color: "#999999"
   extensions:
   - .lasso
   - .las
@@ -1979,7 +1979,7 @@ Nemerle:
 
 NetLinx:
   type: programming
-  color: "#0000ff"
+  color: "#0aa0ff"
   extensions:
   - .axs
   - .axi
@@ -2006,7 +2006,7 @@ NetLogo:
 NewLisp:
   type: programming
   lexer: NewLisp
-  color: "#eedd66"
+  color: "#87AED7"
   extensions:
   - .nl
   - .lisp
@@ -3000,7 +3000,7 @@ Smarty:
 
 SourcePawn:
   type: programming
-  color: "#f69e1d"
+  color: "#c69e1d"
   aliases:
   - sourcemod
   extensions:
@@ -3228,7 +3228,7 @@ VCL:
 
 VHDL:
   type: programming
-  color: "#543978"
+  color: "#343f7f"
   extensions:
   - .vhdl
   - .vhd
@@ -3294,7 +3294,7 @@ Visual Basic:
 
 Volt:
   type: programming
-  color: "#0098db"
+  color: "#1F1F1F"
   extensions:
   - .volt
   tm_scope: source.d
@@ -3533,7 +3533,7 @@ mupad:
 
 nesC:
   type: programming
-  color: "#ffce3b"
+  color: "#bbce3b"
   extensions:
   - .nc
   ace_mode: text