diff --git a/css/swad21.70.1.css b/css/swad21.70.7.css
similarity index 99%
rename from css/swad21.70.1.css
rename to css/swad21.70.7.css
index 17de3bd8d..2d58c358f 100644
--- a/css/swad21.70.1.css
+++ b/css/swad21.70.7.css
@@ -1879,10 +1879,16 @@ a:hover img.CENTER_PHOTO_SHOW
 	background-size:20px 20px;
 	background-repeat:no-repeat;
 	font-size:12pt;
-	color:#632921;
 	text-align:left;
 	overflow:hidden;
 	}
+.ALERT_TXT_WHITE	{color:#632921;}
+.ALERT_TXT_GREY		{color:#632921;}
+.ALERT_TXT_PURPLE	{color:#632921;}
+.ALERT_TXT_BLUE		{color:#632921;}
+.ALERT_TXT_YELLOW	{color:#632921;}
+.ALERT_TXT_PINK		{color:#632921;}
+.ALERT_TXT_DARK		{color:white;}
 
 /*********************************** Icons ***********************************/
 .ICOx16		{	     height:16px; vertical-align:middle;}
diff --git a/swad_alert.c b/swad_alert.c
index 7466f55c2..4f43c3690 100644
--- a/swad_alert.c
+++ b/swad_alert.c
@@ -360,6 +360,7 @@ void Ale_ShowAlertAndButton1 (Ale_AlertType_t AlertType,const char *fmt,...)
 static void Ale_ShowFixAlertAndButton1 (Ale_AlertType_t AlertType,const char *Txt)
   {
    extern const char *The_ClassAlertBackground[The_NUM_THEMES];
+   extern const char *The_ClassAlertTxtColor[The_NUM_THEMES];
    extern const char *Txt_Close;
    char IdAlert[Frm_MAX_BYTES_ID + 1];
    static const bool AlertClosable[Ale_NUM_ALERT_TYPES] =
@@ -414,9 +415,11 @@ static void Ale_ShowFixAlertAndButton1 (Ale_AlertType_t AlertType,const char *Tx
 
       /***** Write message *****/
       if (AlertType == Ale_NONE)
-	 HTM_DIV_Begin ("class=\"ALERT_TXT\"");
+	 HTM_DIV_Begin ("class=\"ALERT_TXT %s\"",
+	                The_ClassAlertTxtColor[Gbl.Prefs.Theme]);
       else
-	 HTM_DIV_Begin ("class=\"ALERT_TXT\" style=\"background-image:url('%s/%s');\"",
+	 HTM_DIV_Begin ("class=\"ALERT_TXT %s\" style=\"background-image:url('%s/%s');\"",
+	                The_ClassAlertTxtColor[Gbl.Prefs.Theme],
 			Cfg_URL_ICON_PUBLIC,Ale_AlertIcons[AlertType]);
       HTM_Txt (Txt);
       HTM_DIV_End ();
diff --git a/swad_changelog.h b/swad_changelog.h
index 68f30b3d4..63d20da2a 100644
--- a/swad_changelog.h
+++ b/swad_changelog.h
@@ -602,12 +602,13 @@ TODO: FIX BUG, URGENT! En las fechas como par
 
 TODO: En las encuestas, que los estudiantes no puedan ver los resultados hasta que no finalice el plazo.
 */
-#define Log_PLATFORM_VERSION	"SWAD 21.70.6 (2021-12-20)"
-#define CSS_FILE		"swad21.70.1.css"
+#define Log_PLATFORM_VERSION	"SWAD 21.70.7 (2021-12-20)"
+#define CSS_FILE		"swad21.70.7.css"
 #define JS_FILE			"swad21.67.4.js"
 /*
 // TODO: al ver los resultados de un juego como profesor, el rol del estudiante sale como desconocido y no se puede ver el DNI
 
+	Version 21.70.7:  Dec 20, 2021  Working on design of dark theme. (321926 lines)
 	Version 21.70.6:  Dec 20, 2021  Working on design of dark theme. (321886 lines)
 	Version 21.70.5:  Dec 19, 2021  Working on design of dark theme. (321748 lines)
 	Version 21.70.4:  Dec 18, 2021  Working on design of dark theme. (321634 lines)
diff --git a/swad_theme.c b/swad_theme.c
index 6e0b0ba37..5e77b7bc6 100644
--- a/swad_theme.c
+++ b/swad_theme.c
@@ -403,6 +403,16 @@ const char *The_ClassAlertBackground[The_NUM_THEMES] =
    [The_THEME_PINK  ] = "ALERT_BG_PINK",
    [The_THEME_DARK  ] = "ALERT_BG_DARK",
   };
+const char *The_ClassAlertTxtColor[The_NUM_THEMES] =
+  {
+   [The_THEME_WHITE ] = "ALERT_TXT_WHITE",
+   [The_THEME_GREY  ] = "ALERT_TXT_GREY",
+   [The_THEME_PURPLE] = "ALERT_TXT_PURPLE",
+   [The_THEME_BLUE  ] = "ALERT_TXT_BLUE",
+   [The_THEME_YELLOW] = "ALERT_TXT_YELLOW",
+   [The_THEME_PINK  ] = "ALERT_TXT_PINK",
+   [The_THEME_DARK  ] = "ALERT_TXT_DARK",
+  };
 
 /*****************************************************************************/
 /****************************** Private prototypes ***************************/