diff --git a/ts/components/lightbox/Lightbox.tsx b/ts/components/lightbox/Lightbox.tsx
index 3b7b8cdbf..c8d8f1d34 100644
--- a/ts/components/lightbox/Lightbox.tsx
+++ b/ts/components/lightbox/Lightbox.tsx
@@ -16,11 +16,6 @@ import * as MIME from '../../types/MIME';
 import { isUndefined } from 'lodash';
 import styled from 'styled-components';
 
-const Colors = {
-  TEXT_SECONDARY: '#bbb',
-  ICON_SECONDARY: 'var(--color-light-gray-color)',
-};
-
 const colorSVG = (url: string, color: string) => {
   return {
     WebkitMask: `url(${url}) no-repeat center`,
@@ -53,7 +48,7 @@ const styles = {
     right: 0,
     top: 0,
     bottom: 0,
-    backgroundColor: 'rgba(0, 0, 0, 0.8)',
+    backgroundColor: 'var(--lightbox-background-color)',
   } as React.CSSProperties,
   mainContainer: {
     display: 'flex',
@@ -95,7 +90,7 @@ const styles = {
     padding: '1em',
     paddingLeft: '3em',
     paddingRight: '3em',
-    backgroundColor: 'rgba(192, 192, 192, .40)',
+    backgroundColor: 'var(--lightbox-caption-background-color)',
   } as React.CSSProperties,
   controlsOffsetPlaceholder: {
     width: CONTROLS_WIDTH,
@@ -181,7 +176,7 @@ const IconButton = ({ onClick, type }: IconButtonProps) => {
         iconSize={'huge'}
         iconRotation={iconRotation}
         // the lightbox has a dark background
-        iconColor="var(--white-color)"
+        iconColor="var(--lightbox-icon-stroke-color)"
         onClick={clickHandler}
       />
     </StyledIconButton>
@@ -200,7 +195,7 @@ const Icon = ({
   <div
     style={{
       ...(styles.object as any),
-      ...colorSVG(url, Colors.ICON_SECONDARY),
+      ...colorSVG(url, 'var(--lightbox-icon-stroke-color)'),
       maxWidth: 200,
     }}
     onClick={onClick}
diff --git a/ts/themes/SessionTheme.tsx b/ts/themes/SessionTheme.tsx
index 6de2293d6..25751281d 100644
--- a/ts/themes/SessionTheme.tsx
+++ b/ts/themes/SessionTheme.tsx
@@ -671,6 +671,12 @@ export const SessionGlobalStyles = createGlobalStyle`
     --suggestions-background-hover-color: ${THEMES.CLASSIC_LIGHT.COLOR4};
     --suggestions-text-color: var(--text-primary-color);
     --suggestions-shadow: rgba(${hexColorToRGB(COLORS.BLACK)}, 0.24) 0px 3px 8px;
+
+  /* Lightbox */
+  --lightbox-background-color: rgba(${hexColorToRGB(COLORS.BLACK)}, 0.8);
+  --lightbox-caption-background-color: 'rgba(192, 192, 192, .40)';
+  --lightbox-icon-stroke-color: var(--white-color);
+
   };
 `;
 
diff --git a/ts/themes/switchTheme.tsx b/ts/themes/switchTheme.tsx
index d55542480..259e5a901 100644
--- a/ts/themes/switchTheme.tsx
+++ b/ts/themes/switchTheme.tsx
@@ -400,6 +400,16 @@ function loadClassicLight(primaryColor?: PrimaryColorStateType) {
     '--suggestions-shadow',
     `rgba(${hexColorToRGB(COLORS.BLACK)}, 0.24) 0px 3px 8px`
   );
+
+  document.documentElement.style.setProperty(
+    '--lightbox-background-color',
+    `rgba(${hexColorToRGB(COLORS.BLACK)}, 0.8)`
+  );
+  document.documentElement.style.setProperty(
+    '--lightbox-caption-background-color',
+    'rgba(192, 192, 192, .40)'
+  );
+  document.documentElement.style.setProperty('--lightbox-icon-stroke-color', 'var(--white-color)');
 }
 
 function loadClassicDark(primaryColor?: PrimaryColorStateType) {
@@ -789,6 +799,16 @@ function loadClassicDark(primaryColor?: PrimaryColorStateType) {
     '--suggestions-shadow',
     `rgba(${hexColorToRGB(COLORS.BLACK)}, 0.24) 0px 3px 8px`
   );
+
+  document.documentElement.style.setProperty(
+    '--lightbox-background-color',
+    `rgba(${hexColorToRGB(COLORS.BLACK)}, 0.8)`
+  );
+  document.documentElement.style.setProperty(
+    '--lightbox-caption-background-color',
+    'rgba(192, 192, 192, .40)'
+  );
+  document.documentElement.style.setProperty('--lightbox-icon-stroke-color', 'var(--white-color)');
 }
 
 function loadOceanLight(primaryColor?: PrimaryColorStateType) {
@@ -1184,6 +1204,16 @@ function loadOceanLight(primaryColor?: PrimaryColorStateType) {
     '--suggestions-shadow',
     `rgba(${hexColorToRGB(COLORS.BLACK)}, 0.24) 0px 3px 8px`
   );
+
+  document.documentElement.style.setProperty(
+    '--lightbox-background-color',
+    `rgba(${hexColorToRGB(COLORS.BLACK)}, 0.8)`
+  );
+  document.documentElement.style.setProperty(
+    '--lightbox-caption-background-color',
+    'rgba(192, 192, 192, .40)'
+  );
+  document.documentElement.style.setProperty('--lightbox-icon-stroke-color', 'var(--white-color)');
 }
 
 function loadOceanDark(primaryColor?: PrimaryColorStateType) {
@@ -1569,6 +1599,16 @@ function loadOceanDark(primaryColor?: PrimaryColorStateType) {
     '--suggestions-shadow',
     `rgba(${hexColorToRGB(COLORS.BLACK)}, 0.24) 0px 3px 8px`
   );
+
+  document.documentElement.style.setProperty(
+    '--lightbox-background-color',
+    `rgba(${hexColorToRGB(COLORS.BLACK)}, 0.8)`
+  );
+  document.documentElement.style.setProperty(
+    '--lightbox-caption-background-color',
+    'rgba(192, 192, 192, .40)'
+  );
+  document.documentElement.style.setProperty('--lightbox-icon-stroke-color', 'var(--white-color)');
 }
 
 export async function switchTheme(theme: ThemeStateType) {