diff --git a/android/app/src/main/java/com/fabledsword/inkwell/ui/Chips.kt b/android/app/src/main/java/com/fabledsword/inkwell/ui/Chips.kt
new file mode 100644
index 0000000..6169030
--- /dev/null
+++ b/android/app/src/main/java/com/fabledsword/inkwell/ui/Chips.kt
@@ -0,0 +1,38 @@
+package com.fabledsword.inkwell.ui
+
+import androidx.compose.foundation.background
+import androidx.compose.foundation.isSystemInDarkTheme
+import androidx.compose.foundation.layout.padding
+import androidx.compose.foundation.shape.RoundedCornerShape
+import androidx.compose.material3.MaterialTheme
+import androidx.compose.material3.Text
+import androidx.compose.runtime.Composable
+import androidx.compose.ui.Modifier
+import androidx.compose.ui.draw.clip
+import androidx.compose.ui.text.style.TextOverflow
+import androidx.compose.ui.unit.dp
+
+/** The corner of every chip on a card: tags, reminders, who shared it. */
+internal val CHIP_RADIUS = 6.dp
+
+/** A one-line chip on a card, in the chip colours of the palette entry [tintKey]. */
+@Composable
+internal fun TintChip(
+    text: String,
+    tintKey: String,
+) {
+    val dark = isSystemInDarkTheme()
+    val tint = noteTint(tintKey)
+    Text(
+        text = text,
+        style = MaterialTheme.typography.labelSmall,
+        color = tint.chipForeground(dark),
+        maxLines = 1,
+        overflow = TextOverflow.Ellipsis,
+        modifier =
+            Modifier
+                .clip(RoundedCornerShape(CHIP_RADIUS))
+                .background(tint.chipBackground(dark))
+                .padding(horizontal = 6.dp, vertical = 2.dp),
+    )
+}
diff --git a/android/app/src/main/java/com/fabledsword/inkwell/ui/ErrorBanner.kt b/android/app/src/main/java/com/fabledsword/inkwell/ui/ErrorBanner.kt
index 1c8c4a2..55bc7dc 100644
--- a/android/app/src/main/java/com/fabledsword/inkwell/ui/ErrorBanner.kt
+++ b/android/app/src/main/java/com/fabledsword/inkwell/ui/ErrorBanner.kt
@@ -4,6 +4,7 @@ import androidx.compose.foundation.background
 import androidx.compose.foundation.border
 import androidx.compose.foundation.isSystemInDarkTheme
 import androidx.compose.foundation.layout.Row
+import androidx.compose.foundation.layout.RowScope
 import androidx.compose.foundation.layout.fillMaxWidth
 import androidx.compose.foundation.layout.padding
 import androidx.compose.foundation.shape.RoundedCornerShape
@@ -28,9 +29,28 @@ import com.fabledsword.inkwell.R
 fun ErrorBanner(
     message: String,
     onDismiss: () -> Unit,
+) {
+    Banner("red") {
+        Text(
+            text = message,
+            style = MaterialTheme.typography.bodyMedium,
+            modifier = Modifier.weight(1f),
+        )
+        TextButton(onClick = onDismiss) { Text(stringResource(R.string.error_dismiss)) }
+    }
+}
+
+/**
+ * A strip across the top of a screen, tinted from the note palette by [tintKey]: a
+ * message on the left and what can be done about it on the right.
+ */
+@Composable
+fun Banner(
+    tintKey: String,
+    content: @Composable RowScope.() -> Unit,
 ) {
     val dark = isSystemInDarkTheme()
-    val tint = noteTint("red")
+    val tint = noteTint(tintKey)
     Row(
         modifier =
             Modifier
@@ -42,12 +62,7 @@ fun ErrorBanner(
                 .padding(start = 12.dp),
         verticalAlignment = Alignment.CenterVertically,
     ) {
-        Text(
-            text = message,
-            style = MaterialTheme.typography.bodyMedium,
-            modifier = Modifier.weight(1f),
-        )
-        TextButton(onClick = onDismiss) { Text(stringResource(R.string.error_dismiss)) }
+        content()
     }
 }
 
diff --git a/android/app/src/main/java/com/fabledsword/inkwell/ui/NoteCard.kt b/android/app/src/main/java/com/fabledsword/inkwell/ui/NoteCard.kt
index 1c81eb5..22c79bf 100644
--- a/android/app/src/main/java/com/fabledsword/inkwell/ui/NoteCard.kt
+++ b/android/app/src/main/java/com/fabledsword/inkwell/ui/NoteCard.kt
@@ -444,28 +444,6 @@ private fun SharedChip(note: Note) {
     TintChip(text, "default")
 }
 
-/** A one-line chip on a card, in the chip colours of the palette entry [tintKey]. */
-@Composable
-private fun TintChip(
-    text: String,
-    tintKey: String,
-) {
-    val dark = isSystemInDarkTheme()
-    val tint = noteTint(tintKey)
-    Text(
-        text = text,
-        style = MaterialTheme.typography.labelSmall,
-        color = tint.chipForeground(dark),
-        maxLines = 1,
-        overflow = TextOverflow.Ellipsis,
-        modifier =
-            Modifier
-                .clip(RoundedCornerShape(CHIP_RADIUS))
-                .background(tint.chipBackground(dark))
-                .padding(horizontal = 6.dp, vertical = 2.dp),
-    )
-}
-
 /** A box that does nothing when tapped: someone else's note, shared to view. */
 private val INERT_TOGGLE: (Int, Boolean) -> Unit = { _, _ -> }
 
@@ -539,4 +517,3 @@ private val CARD_SURFACE_DARK = Color(0xFF171717)
 // surfaces stay the same card. Contrast: #B8B8B8 on white 1.98, #404040 on #171717 1.73.
 private val CARD_EDGE_LIGHT = Color(0xFFB8B8B8)
 private val CARD_EDGE_DARK = Color(0xFF404040)
-private val CHIP_RADIUS = 6.dp
diff --git a/android/app/src/main/java/com/fabledsword/inkwell/ui/UpdateCard.kt b/android/app/src/main/java/com/fabledsword/inkwell/ui/UpdateCard.kt
index 39ff1f8..ad88b04 100644
--- a/android/app/src/main/java/com/fabledsword/inkwell/ui/UpdateCard.kt
+++ b/android/app/src/main/java/com/fabledsword/inkwell/ui/UpdateCard.kt
@@ -1,8 +1,5 @@
 package com.fabledsword.inkwell.ui
 
-import androidx.compose.foundation.background
-import androidx.compose.foundation.border
-import androidx.compose.foundation.isSystemInDarkTheme
 import androidx.compose.foundation.layout.Arrangement
 import androidx.compose.foundation.layout.Column
 import androidx.compose.foundation.layout.Row
@@ -10,7 +7,6 @@ import androidx.compose.foundation.layout.Spacer
 import androidx.compose.foundation.layout.fillMaxWidth
 import androidx.compose.foundation.layout.padding
 import androidx.compose.foundation.layout.size
-import androidx.compose.foundation.shape.RoundedCornerShape
 import androidx.compose.material3.Button
 import androidx.compose.material3.CircularProgressIndicator
 import androidx.compose.material3.LinearProgressIndicator
@@ -23,9 +19,7 @@ import androidx.compose.runtime.getValue
 import androidx.compose.runtime.mutableStateOf
 import androidx.compose.runtime.remember
 import androidx.compose.runtime.setValue
-import androidx.compose.ui.Alignment
 import androidx.compose.ui.Modifier
-import androidx.compose.ui.draw.clip
 import androidx.compose.ui.platform.LocalContext
 import androidx.compose.ui.res.stringResource
 import androidx.compose.ui.unit.dp
@@ -152,19 +146,7 @@ fun UpdateBanner(
     onInstall: () -> Unit,
     onDismiss: () -> Unit,
 ) {
-    val dark = isSystemInDarkTheme()
-    val tint = noteTint("blue")
-    Row(
-        modifier =
-            Modifier
-                .fillMaxWidth()
-                .padding(horizontal = 12.dp, vertical = 4.dp)
-                .clip(RoundedCornerShape(BANNER_RADIUS))
-                .background(tint.background(dark))
-                .border(1.dp, tint.border(dark), RoundedCornerShape(BANNER_RADIUS))
-                .padding(start = 12.dp),
-        verticalAlignment = Alignment.CenterVertically,
-    ) {
+    Banner("blue") {
         Text(
             text = stringResource(R.string.update_banner_ready, version),
             style = MaterialTheme.typography.bodyMedium,
@@ -180,7 +162,6 @@ fun UpdateBanner(
     }
 }
 
-private val BANNER_RADIUS = 12.dp
 private val BANNER_SPINNER = 18.dp
 
 /**