diff --git a/projects/nshmp-apps/src/app/designmaps/rtgm/components/plots/plots.component.html b/projects/nshmp-apps/src/app/designmaps/rtgm/components/plots/plots.component.html
index 82c4428f83b00ccbf07715e68a374dbce1dce312..c9f84b1b31374d3e866c741b98c57736e9e6369f 100644
--- a/projects/nshmp-apps/src/app/designmaps/rtgm/components/plots/plots.component.html
+++ b/projects/nshmp-apps/src/app/designmaps/rtgm/components/plots/plots.component.html
@@ -1,4 +1,23 @@
 <nshmp-lib-ng-plots-container>
+  <nshmp-lib-ng-alert title="Calculations">
+    This application currently performs the RTGM calculation for a single
+    intensity measure (IM) hazard curve at a time. For bulk calculation of RTGMs
+    for a larger number of IM hazard curves, please refer to
+    <a
+      target="_blank"
+      href="https://earthquake.usgs.gov/ws/nshmp/designmaps/rtgm/"
+    >
+      https://earthquake.usgs.gov/ws/nshmp/designmaps/rtgm/
+    </a>
+    or
+    <a
+      target="_blank"
+      href="https://code.usgs.gov/ghsc/erp/erp-rtgm-calculator"
+    >
+      https://code.usgs.gov/ghsc/erp/erp-rtgm-calculator
+    </a>
+  </nshmp-lib-ng-alert>
+
   <mat-accordion multi>
     @for (plot of plots(); track $index) {
       <mat-expansion-panel expanded>
diff --git a/projects/nshmp-apps/src/app/designmaps/rtgm/components/plots/plots.component.ts b/projects/nshmp-apps/src/app/designmaps/rtgm/components/plots/plots.component.ts
index d916030011d1e2a53c1cb3f80529ffd25363b68c..220132002d36ea70fb30096cd596f9193b26527b 100644
--- a/projects/nshmp-apps/src/app/designmaps/rtgm/components/plots/plots.component.ts
+++ b/projects/nshmp-apps/src/app/designmaps/rtgm/components/plots/plots.component.ts
@@ -1,7 +1,10 @@
 import {Component, computed, OnDestroy, OnInit} from '@angular/core';
 import {MatDivider} from '@angular/material/divider';
 import {MatExpansionModule} from '@angular/material/expansion';
-import {NshmpLibNgAppMetadataComponent} from '@ghsc/nshmp-lib-ng/nshmp';
+import {
+  NshmpLibNgAlertComponent,
+  NshmpLibNgAppMetadataComponent,
+} from '@ghsc/nshmp-lib-ng/nshmp';
 import {
   NshmpLibNgPlotComponent,
   NshmpLibNgPlotsContainerComponent,
@@ -18,6 +21,7 @@ import {RtgmSummaryComponent} from '../rtgm-summary/rtgm-summary.component';
     NshmpLibNgPlotsContainerComponent,
     NshmpLibNgPlotComponent,
     NshmpLibNgAppMetadataComponent,
+    NshmpLibNgAlertComponent,
     MatExpansionModule,
     MatDivider,
     ParameterSummaryComponent,
diff --git a/projects/nshmp-apps/src/app/designmaps/rtgm/services/app.service.ts b/projects/nshmp-apps/src/app/designmaps/rtgm/services/app.service.ts
index 60c6214fcfa6c0b8709c97fd54dea45f19c6f8cd..cc8b8f5e6a754e766db950f518d47d787421bc0a 100644
--- a/projects/nshmp-apps/src/app/designmaps/rtgm/services/app.service.ts
+++ b/projects/nshmp-apps/src/app/designmaps/rtgm/services/app.service.ts
@@ -35,7 +35,6 @@ interface DefaultPlotProps {
   title: string;
   xLabel: string;
   yLabel: string;
-
   xRange?: number[];
   xType?: AxisType;
   yRange?: number[];
@@ -301,6 +300,25 @@ export class AppService
     }
   }
 
+  private colorScale(iterations: RtgmIteration[]): readonly string[] {
+    const ncolor = iterations.length % 9;
+
+    const colors: (readonly string[])[] = [
+      [],
+      ['#084081'],
+      ['#2b8cbe', '#084081'],
+      ['#7bccc4', '#2b8cbe', '#084081'],
+      ['#ccebc5', '#7bccc4', '#2b8cbe', '#084081'],
+      ['#f7fcf0', '#ccebc5', '#7bccc4', '#2b8cbe', '#084081'],
+      d3Color.schemeGnBu[6],
+      d3Color.schemeGnBu[7],
+      d3Color.schemeGnBu[8],
+      d3Color.schemeGnBu[9],
+    ];
+
+    return colors[ncolor];
+  }
+
   private createDerivativeFragilityPlot(
     iterations: IterationPlotData
   ): NshmpPlot {
@@ -351,7 +369,7 @@ export class AppService
     yRange: number[]
   ): Partial<PlotData>[] {
     const fragilitySlices: Partial<PlotData>[] = [];
-    const colors = d3Color.schemeCategory10;
+    const colors = this.colorScale(iterations);
 
     iterations.forEach((iteration, index) => {
       const color = colors[index % iterations.length];
@@ -463,7 +481,11 @@ export class AppService
     const hazardFragilityPlotData: Partial<PlotData>[] = [];
     const integralHazardFragilityPlotData: Partial<PlotData>[] = [];
 
+    const colors = this.colorScale(iterations);
+
     iterations.forEach((iteration, index) => {
+      const color = colors[index % iterations.length];
+
       const name =
         index === iterations.length - 1
           ? 'Final Iteration'
@@ -471,6 +493,9 @@ export class AppService
 
       fragilityPlotData.push({
         hovertemplate: '%{x} g, %{y}',
+        line: {
+          color,
+        },
         mode: 'lines+markers',
         name,
         x: imls,
@@ -479,6 +504,9 @@ export class AppService
 
       derivativeFragilityPlotData.push({
         hovertemplate: '%{x} g, %{y}',
+        line: {
+          color,
+        },
         mode: 'lines+markers',
         name,
         x: imls,
@@ -487,6 +515,9 @@ export class AppService
 
       hazardFragilityPlotData.push({
         hovertemplate: '%{x} g, %{y}',
+        line: {
+          color,
+        },
         mode: 'lines+markers',
         name,
         x: imls,
@@ -495,6 +526,9 @@ export class AppService
 
       integralHazardFragilityPlotData.push({
         hovertemplate: '%{x} g, %{y}',
+        line: {
+          color,
+        },
         mode: 'lines+markers',
         name,
         x: imls,