diff --git a/crates/ui-egui/src/panels/viewer_tools.rs b/crates/ui-egui/src/panels/viewer_tools.rs
index e704e0a6..c94f94f5 100644
--- a/crates/ui-egui/src/panels/viewer_tools.rs
+++ b/crates/ui-egui/src/panels/viewer_tools.rs
@@ -349,6 +349,14 @@ fn transformed(img: &egui::ColorImage, ch: Channel, colorized: bool, stops: f32,
     egui::ColorImage::new(img.size, px.into_iter().map(|a| Color32::from_rgba_premultiplied(a[0], a[1], a[2], a[3])).collect())
 }
 
+/// The display conversion's inputs, for the texture caches.
+pub(crate) fn display_key(app: &EffectcraftApp, has_conversion: bool) -> String {
+    let opts = &app.session.state.viewer;
+    let custom = if opts.simulation.profile == vw::SimProfile::MyCustom { format!("{:?}", app.session.prefs.custom_rgb) } else { String::new() };
+    format!("{:?}{:?}{}{custom}", has_conversion, opts.simulation, app.session.prefs.previews.display_profile)
+        + &format!("{:?}{:?}{}", app.session.project.settings.working_space, app.session.project.settings.output_space, opts.display_color_management)
+}
+
 /// Draw the frame into `comp_rect`: the rendered frame (covering the region of interest when one
 /// is set), or the snapshot while Show Snapshot is on / F5 is held, through Show Channel and the
 /// exposure. Fast Previews ▸ Wireframe draws layer outlines instead.
@@ -378,10 +386,7 @@ pub(crate) fn draw_frame(app: &mut EffectcraftApp, ctx: &egui::Context, painter:
         return;
     }
     let dc = vw::DisplayColor::of(&app.session);
-    // The display conversion's inputs, for the texture caches.
-    let custom = if opts.simulation.profile == vw::SimProfile::MyCustom { format!("{:?}", app.session.prefs.custom_rgb) } else { String::new() };
-    let dc_key = format!("{:?}{:?}{}{custom}", dc.is_some(), opts.simulation, app.session.prefs.previews.display_profile)
-        + &format!("{:?}{:?}{}", app.session.project.settings.working_space, app.session.project.settings.output_space, opts.display_color_management);
+    let dc_key = display_key(app, dc.is_some());
     let plain = opts.channel == Channel::Rgb && opts.exposure == 0.0 && dc.is_none();
     let uv = Rect::from_min_max(pos2(0.0, 0.0), pos2(1.0, 1.0));
     if snap {
diff --git a/crates/ui-egui/src/panels/viewers.rs b/crates/ui-egui/src/panels/viewers.rs
index f23fd511..8d235133 100644
--- a/crates/ui-egui/src/panels/viewers.rs
+++ b/crates/ui-egui/src/panels/viewers.rs
@@ -102,7 +102,9 @@ pub fn show(app: &mut EffectcraftApp, ui: &mut egui::Ui, id: u32, rect: Rect) {
             app.request_frame(cid, frame, scale);
             let key = app.frame_key(cid, frame, scale);
             if let Some((key, img)) = app.frames.get_for_viewer(&key, app.passive_tex.get(&id).map(|(k, _)| k)) {
-                set_texture(app, &ctx, id, key, img);
+                let dc = effectcraft_engine::viewer::DisplayColor::of(&app.session);
+                let dkey = display_hash(&super::viewer_tools::display_key(app, dc.is_some()));
+                set_texture(app, &ctx, id, key, img, dc, dkey);
             }
             match app.passive_tex.get(&id).filter(|(k, _)| k.comp == cid.0) {
                 Some((_, tex)) => {
@@ -126,16 +128,38 @@ pub fn show(app: &mut EffectcraftApp, ui: &mut egui::Ui, id: u32, rect: Rect) {
 }
 
 /// Keep the frame viewer `id` shows in its texture.
-fn set_texture(app: &mut EffectcraftApp, ctx: &egui::Context, id: u32, key: FrameKey, img: FrameImage) {
+fn set_texture(
+    app: &mut EffectcraftApp,
+    ctx: &egui::Context,
+    id: u32,
+    key: FrameKey,
+    img: FrameImage,
+    dc: Option<effectcraft_engine::viewer::DisplayColor>,
+    dkey: u64,
+) {
+    let dc_id = egui::Id::new(("passive-viewer-display", id));
+    let same_display = ctx.data(|d| d.get_temp::<u64>(dc_id)) == Some(dkey);
     if let Some((k, _)) = app.passive_tex.get_mut(&id)
         && *k == key
+        && same_display
     {
         // An undo or an edit elsewhere can reuse this content at a newer revision. Keep that
         // revision as the lower bound for subsequent intermediate edit frames.
         k.revision = key.revision;
         return;
     }
+    ctx.data_mut(|d| d.insert_temp(dc_id, dkey));
     let opts = super::viewer::zoom_texture_options(app.session.prefs.viewer_zoom_smooth());
+    // The monitor conversion the active viewer applies (Use Display Color Management).
+    let img = match (img, &dc) {
+        (FrameImage::Cpu(img), Some(dc)) => {
+            let mut px: Vec<[u8; 4]> = img.pixels.iter().map(|c| c.to_array()).collect();
+            dc.apply(&mut px);
+            let pixels = px.into_iter().map(|a| Color32::from_rgba_premultiplied(a[0], a[1], a[2], a[3])).collect();
+            FrameImage::Cpu(Arc::new(egui::ColorImage::new(img.size, pixels)))
+        }
+        (img, _) => img,
+    };
     let tex = match (img, app.passive_tex.remove(&id)) {
         (FrameImage::Cpu(img), Some((_, PassiveTexture::Cpu(mut h))))
             if h.size() == crate::frames::fitted_size(img.size, crate::frames::max_texture_side(ctx)) =>
@@ -165,6 +189,14 @@ fn set_texture(app: &mut EffectcraftApp, ctx: &egui::Context, id: u32, key: Fram
     app.passive_tex.insert(id, (key, tex));
 }
 
+/// A hash of the display conversion's inputs (see `viewer_tools::display_key`).
+fn display_hash(key: &str) -> u64 {
+    use std::hash::{Hash, Hasher};
+    let mut h = std::collections::hash_map::DefaultHasher::new();
+    key.hash(&mut h);
+    h.finish()
+}
+
 /// Give a passive viewer's texture back (GPU textures are registered with the renderer).
 fn free(app: &EffectcraftApp, tex: Option<PassiveTexture>) {
     if let (Some(PassiveTexture::Gpu(id, _)), Some(rs)) = (tex, &app.wgpu) {
diff --git a/crates/ui-egui/tests/viewer_passive_display.rs b/crates/ui-egui/tests/viewer_passive_display.rs
new file mode 100644
index 00000000..797689af
--- /dev/null
+++ b/crates/ui-egui/tests/viewer_passive_display.rs
@@ -0,0 +1,58 @@
+//! A passive Composition viewer applies the same monitor conversion as the active one (#547).
+use effectcraft_engine::Session;
+use effectcraft_ui_egui::{EffectcraftApp, menus, panels::viewers};
+use egui::{Color32, Context, ImageData, RawInput, Rect, pos2, vec2};
+use serde_json::json;
+use std::collections::HashMap;
+
+fn frames(app: &mut EffectcraftApp, ctx: &Context, textures: &mut HashMap<String, Vec<Color32>>) {
+    for _ in 0..4 {
+        let mut output = ctx.run_ui(RawInput { screen_rect: Some(Rect::from_min_size(pos2(0.0, 0.0), vec2(256.0, 256.0))), ..Default::default() }, |ui| {
+            viewers::show(app, ui, 0, Rect::from_min_size(pos2(0.0, 0.0), vec2(128.0, 256.0)));
+            viewers::show(app, ui, 1, Rect::from_min_size(pos2(128.0, 0.0), vec2(128.0, 256.0)));
+        });
+        for (&id, deltas) in &output.textures_delta.set {
+            let Some(name) = ctx.tex_manager().read().meta(id).map(|m| m.name.clone()) else { continue };
+            for delta in deltas {
+                let ImageData::Color(image) = &delta.image;
+                if delta.pos.is_none() {
+                    textures.insert(name.clone(), image.pixels.clone());
+                }
+            }
+        }
+        output.textures_delta.clear();
+        std::thread::sleep(std::time::Duration::from_millis(100));
+    }
+}
+
+fn pixel(textures: &HashMap<String, Vec<Color32>>, name: &str) -> [u8; 4] {
+    let p = &textures[name];
+    p[p.len() / 2].to_array()
+}
+
+#[test]
+fn passive_viewer_matches_the_monitor_conversion() {
+    let mut s = Session::default();
+    s.execute("comp.new", json!({"name": "Display test", "width": 16, "height": 16, "duration": 1})).unwrap();
+    s.execute("layer.newSolid", json!({"name": "Color", "color": "#406080", "width": 16, "height": 16})).unwrap();
+    s.execute("edit.deselectAll", json!({})).unwrap();
+    let mut app = EffectcraftApp::new(s);
+    let ctx = Context::default();
+    menus::invoke(&mut app, &ctx, "view.newViewer", json!({})).unwrap();
+    let mut textures = HashMap::new();
+    app.session.execute("file.projectSettings", json!({"workingSpace": "rec2020"})).unwrap();
+    app.session.execute("prefs.set", json!({"key": "previews.displayProfile", "value": "p3"})).unwrap();
+    frames(&mut app, &ctx, &mut textures);
+    assert_eq!(pixel(&textures, "viewer-display"), [37, 89, 122, 255]);
+    assert_eq!(pixel(&textures, "viewer-0"), [37, 89, 122, 255]);
+    // Changing which viewer is active keeps the conversion in both.
+    viewers::activate(&mut app, &ctx, 0);
+    frames(&mut app, &ctx, &mut textures);
+    assert_eq!(pixel(&textures, "viewer-display"), [37, 89, 122, 255]);
+    assert_eq!(pixel(&textures, "viewer-1"), [37, 89, 122, 255]);
+    // No output-to-monitor conversion needed: both show the raw frame.
+    app.session.execute("prefs.set", json!({"key": "previews.displayProfile", "value": "srgb"})).unwrap();
+    frames(&mut app, &ctx, &mut textures);
+    assert_eq!(pixel(&textures, "viewer-frame"), [0, 90, 125, 255]);
+    assert_eq!(pixel(&textures, "viewer-1"), [0, 90, 125, 255]);
+}