diff --git a/app/src/main/java/ua/acclorite/book_story/ui/theme/Color.kt b/app/src/main/java/ua/acclorite/book_story/ui/theme/Color.kt
index 9704d3a3..ea194a30 100644
--- a/app/src/main/java/ua/acclorite/book_story/ui/theme/Color.kt
+++ b/app/src/main/java/ua/acclorite/book_story/ui/theme/Color.kt
@@ -10,13 +10,13 @@ import ua.acclorite.book_story.ui.theme.color.aquaTheme
 import ua.acclorite.book_story.ui.theme.color.blackTheme
 import ua.acclorite.book_story.ui.theme.color.blueTheme
 import ua.acclorite.book_story.ui.theme.color.dynamicTheme
-import ua.acclorite.book_story.ui.theme.color.grayTheme
 import ua.acclorite.book_story.ui.theme.color.greenTheme
 import ua.acclorite.book_story.ui.theme.color.lavenderTheme
 import ua.acclorite.book_story.ui.theme.color.marshTheme
 import ua.acclorite.book_story.ui.theme.color.pink2Theme
 import ua.acclorite.book_story.ui.theme.color.pinkTheme
 import ua.acclorite.book_story.ui.theme.color.purpleTheme
+import ua.acclorite.book_story.ui.theme.color.redGrayTheme
 import ua.acclorite.book_story.ui.theme.color.redTheme
 import ua.acclorite.book_story.ui.theme.color.yellow2Theme
 import ua.acclorite.book_story.ui.theme.color.yellowTheme
@@ -29,10 +29,10 @@ enum class Theme(
 ) {
     DYNAMIC(hasThemeContrast = false, title = R.string.dynamic_theme),
     BLUE(hasThemeContrast = true, title = R.string.blue_theme),
-    GRAY(hasThemeContrast = false, title = R.string.gray_theme),
     GREEN(hasThemeContrast = true, title = R.string.green_theme),
     MARSH(hasThemeContrast = true, title = R.string.marsh_theme),
     RED(hasThemeContrast = true, title = R.string.red_theme),
+    RED_GRAY(hasThemeContrast = false, title = R.string.red_gray_theme),
     PURPLE(hasThemeContrast = true, title = R.string.purple_theme),
     LAVENDER(hasThemeContrast = true, title = R.string.lavender_theme),
     PINK(hasThemeContrast = true, title = R.string.pink_theme),
@@ -128,9 +128,9 @@ fun colorScheme(
             redTheme(isDark = darkTheme, themeContrast = themeContrast)
         }
 
-        Theme.GRAY -> {
-            /* Gray Theme */
-            grayTheme(isDark = darkTheme)
+        Theme.RED_GRAY -> {
+            /* Red Gray Theme */
+            redGrayTheme(isDark = darkTheme)
         }
 
         Theme.AQUA -> {
diff --git a/app/src/main/java/ua/acclorite/book_story/ui/theme/color/GrayTheme.kt b/app/src/main/java/ua/acclorite/book_story/ui/theme/color/GrayTheme.kt
index c3610c4e..1fa1e5b2 100644
--- a/app/src/main/java/ua/acclorite/book_story/ui/theme/color/GrayTheme.kt
+++ b/app/src/main/java/ua/acclorite/book_story/ui/theme/color/GrayTheme.kt
@@ -81,7 +81,7 @@ private val surfaceContainerHighestDark = Color(0xFF383433)
 
 
 @Composable
-fun grayTheme(isDark: Boolean): ColorScheme {
+fun redGrayTheme(isDark: Boolean): ColorScheme {
     return if (isDark) {
         darkColorScheme(
             primary = primaryDark,
diff --git a/app/src/main/res/values-ar/strings.xml b/app/src/main/res/values-ar/strings.xml
index b18cce39..677fd1e1 100644
--- a/app/src/main/res/values-ar/strings.xml
+++ b/app/src/main/res/values-ar/strings.xml
@@ -244,7 +244,7 @@
     <string name="internal_storage">التخزين الداخلي</string>
     <string name="file_last_opened">اخر مرة تم فيها فتح الملف</string>
     <string name="chapters">فصول</string>
-    <string name="gray_theme">كاليستو</string>
+    <string name="red_gray_theme">كاليستو</string>
     <string name="lavender_theme">ايريس</string>
     <string name="no_chapters">لا يوجد فصول</string>
     <string name="hide_bars_on_fast_scroll_option">اخفاء الشرائط عند التمرير السريع</string>
diff --git a/app/src/main/res/values-cs/strings.xml b/app/src/main/res/values-cs/strings.xml
index fa1a20ea..ad1553fa 100644
--- a/app/src/main/res/values-cs/strings.xml
+++ b/app/src/main/res/values-cs/strings.xml
@@ -132,7 +132,7 @@
     <string name="screen_orientation_locked_landscape">Pouze na šířku</string>
     <string name="horizontal_gesture_off">Vypnuté</string>
     <string name="horizontal_gesture_on">Zapnuté</string>
-    <string name="gray_theme">Callisto</string>
+    <string name="red_gray_theme">Callisto</string>
     <string name="no_chapters">Žádné kapitoly</string>
     <string name="report_bug_option">Nahlásit chybu</string>
     <string name="credits_option">Zdroje</string>
diff --git a/app/src/main/res/values-de/strings.xml b/app/src/main/res/values-de/strings.xml
index d34dbd02..b4f1179b 100644
--- a/app/src/main/res/values-de/strings.xml
+++ b/app/src/main/res/values-de/strings.xml
@@ -341,7 +341,7 @@
     <string name="chapters_content_desc">Kapitel</string>
     <string name="more_content_desc">Mehr</string>
     <string name="custom_screen_brightness_option">Benutzerdefinierte Helligkeit</string>
-    <string name="gray_theme">Kallisto</string>
+    <string name="red_gray_theme">Kallisto</string>
     <string name="help_desc_how_to_use_perception_expander_1">Der Wahrnehmungsexpander kann Ihnen helfen, schneller zu lesen. Aktivieren Sie ihn zunächst in den Reader-Einstellungen (siehe: Wie passe ich den Reader an?). Sobald er aktiviert ist, werden auf beiden Seiten des Readers zwei vertikale Linien angezeigt. Um Ihre Lesegeschwindigkeit weiter zu optimieren, passen Sie die Polsterung an, um weniger Platz um die Mitte herum zu schaffen. Konzentrieren Sie sich bei der Verwendung auf die Bildschirmmitte, während Sie mit Ihrem peripheren Sehen den Text an den Seiten erfassen. Konzentrieren Sie sich beim Lesen weiterhin auf die Mitte, ohne nach jeder Zeile direkt an die Seiten zu blicken.</string>
     <string name="checkpoint_back_content_desc">Kontrollpunkt zurück</string>
 </resources>
\ No newline at end of file
diff --git a/app/src/main/res/values-es/strings.xml b/app/src/main/res/values-es/strings.xml
index 980ffdcf..499630b8 100644
--- a/app/src/main/res/values-es/strings.xml
+++ b/app/src/main/res/values-es/strings.xml
@@ -341,7 +341,7 @@
     <string name="random_string">Aleatorio</string>
     <string name="search_field_empty">Buscar…</string>
     <string name="screen_brightness_option">Brillo</string>
-    <string name="gray_theme">Calisto</string>
+    <string name="red_gray_theme">Calisto</string>
     <string name="custom_screen_brightness_option">Brillo personalizado</string>
     <string name="pink2_theme">Ganimedes</string>
 </resources>
\ No newline at end of file
diff --git a/app/src/main/res/values-it/strings.xml b/app/src/main/res/values-it/strings.xml
index de16c635..15e903e4 100644
--- a/app/src/main/res/values-it/strings.xml
+++ b/app/src/main/res/values-it/strings.xml
@@ -283,7 +283,7 @@
     <string name="help_title_how_to_use_color_presets">Come si utilizzano le preimpostazioni di colore?</string>
     <string name="start_welcome_desc">Verso un mondo in cui le parole incantano, insegnano e conducono verso avventure incredibili! Prepariamo un po\' di cose!</string>
     <string name="perception_expander_option">Espansore della percezione</string>
-    <string name="gray_theme">Callisto</string>
+    <string name="red_gray_theme">Callisto</string>
     <string name="horizontal_gesture_option">Gesto orizzontale</string>
     <string name="chapter_title_alignment_option">Allineamento del titolo del capitolo</string>
     <string name="fullscreen_option_desc">Nascondi barre e margini di sistema</string>
diff --git a/app/src/main/res/values-pt-rBR/strings.xml b/app/src/main/res/values-pt-rBR/strings.xml
index 0bcc1d5a..c8461682 100644
--- a/app/src/main/res/values-pt-rBR/strings.xml
+++ b/app/src/main/res/values-pt-rBR/strings.xml
@@ -136,7 +136,7 @@
     <string name="filter_content_desc">Filtro</string>
     <string name="delete_book_description">Isso irá apagar o livro do banco de dados. Isso não irá apagar esse livro do dispositivo.</string>
     <string name="random_string">Aleatório</string>
-    <string name="gray_theme">Calisto</string>
+    <string name="red_gray_theme">Calisto</string>
     <string name="general_settings_desc">Linguagem do aplicativo</string>
     <string name="appearance_settings_desc">Tema, cores</string>
     <string name="language_option">Linguagem do aplicativo</string>
diff --git a/app/src/main/res/values-ta/strings.xml b/app/src/main/res/values-ta/strings.xml
index 3f627f43..54b8d9a6 100644
--- a/app/src/main/res/values-ta/strings.xml
+++ b/app/src/main/res/values-ta/strings.xml
@@ -271,7 +271,7 @@
     <string name="green_theme">பூமி</string>
     <string name="red_theme">செவ்வாய்</string>
     <string name="credits_icon">சின்னங்கள்</string>
-    <string name="gray_theme">காலிச்டோ</string>
+    <string name="red_gray_theme">காலிச்டோ</string>
     <string name="purple_theme">வியாழன்</string>
     <string name="pink_theme">காரி</string>
     <string name="pink2_theme">கனிமீட்</string>
diff --git a/app/src/main/res/values-uk/strings.xml b/app/src/main/res/values-uk/strings.xml
index 45493eef..51040f32 100644
--- a/app/src/main/res/values-uk/strings.xml
+++ b/app/src/main/res/values-uk/strings.xml
@@ -291,7 +291,7 @@
     <string name="blue_theme">Нептун</string>
     <string name="green_theme">Земля</string>
     <string name="red_theme">Марс</string>
-    <string name="gray_theme">Каллісто</string>
+    <string name="red_gray_theme">Каллісто</string>
     <string name="purple_theme">Юпітер</string>
     <string name="pink_theme">Сатурн</string>
     <string name="pink2_theme">Ганімед</string>
diff --git a/app/src/main/res/values-zh-rCN/strings.xml b/app/src/main/res/values-zh-rCN/strings.xml
index 3e934226..0c04fbc8 100644
--- a/app/src/main/res/values-zh-rCN/strings.xml
+++ b/app/src/main/res/values-zh-rCN/strings.xml
@@ -348,7 +348,7 @@
     <string name="more_content_desc">更多</string>
     <string name="shuffle_color_preset_content_desc">随机颜色</string>
     <string name="filter_content_desc">过滤</string>
-    <string name="gray_theme">木卫一</string>
+    <string name="red_gray_theme">木卫一</string>
     <string name="pink2_theme">木卫三</string>
     <string name="yellow2_theme">鸟神星</string>
     <string name="tryzub_content_desc">三叉戟</string>
diff --git a/app/src/main/res/values/strings.xml b/app/src/main/res/values/strings.xml
index 220b98ab..d0def73c 100644
--- a/app/src/main/res/values/strings.xml
+++ b/app/src/main/res/values/strings.xml
@@ -350,7 +350,7 @@
     <string name="blue_theme">Neptune</string>
     <string name="green_theme">Earth</string>
     <string name="red_theme">Mars</string>
-    <string name="gray_theme">Callisto</string>
+    <string name="red_gray_theme">Callisto</string>
     <string name="purple_theme">Jupiter</string>
     <string name="pink_theme">Saturn</string>
     <string name="pink2_theme">Ganymede</string>