@mytec: iter10.1 ready for testing

frontend/src/utils/colorGradient.ts

@@ -1,10 +1,10 @@
 /**
  * RSRP → color mapping with smooth gradient interpolation.
  *
- * Gradient stops are chosen to match standard RF planning tools:
- *   -130 dBm = deep blue (no service)
- *    -90 dBm = green (fair)
- *    -50 dBm = red (excellent)
+ * Warm-only palette (no cyan/green):
+ *   -130 dBm = dark maroon (no service)
+ *    -90 dBm = orange (fair)
+ *    -50 dBm = bright red (excellent)
  *
  * All functions are pure and allocation-free on the hot path
  * (pre-built lookup table for fast per-pixel color resolution).
@@ -18,16 +18,14 @@ interface GradientStop {
 }
 
 const GRADIENT_STOPS: GradientStop[] = [
-  { value: 0.0, r: 26, g: 35, b: 126 },    // #1a237e — deep blue
-  { value: 0.15, r: 13, g: 71, b: 161 },    // #0d47a1
-  { value: 0.25, r: 33, g: 150, b: 243 },   // #2196f3 — blue
-  { value: 0.35, r: 0, g: 188, b: 212 },    // #00bcd4 — cyan
-  { value: 0.45, r: 0, g: 137, b: 123 },    // #00897b — teal
-  { value: 0.55, r: 76, g: 175, b: 80 },    // #4caf50 — green
-  { value: 0.65, r: 139, g: 195, b: 74 },   // #8bc34a — light green
-  { value: 0.75, r: 255, g: 235, b: 59 },   // #ffeb3b — yellow
-  { value: 0.85, r: 255, g: 152, b: 0 },    // #ff9800 — orange
-  { value: 1.0, r: 244, g: 67, b: 54 },     // #f44336 — red
+  { value: 0.0, r: 60, g: 20, b: 40 },      // #3c1428 — deep maroon (no service)
+  { value: 0.15, r: 100, g: 20, b: 30 },     // #64141e — dark red-brown
+  { value: 0.30, r: 139, g: 0, b: 0 },       // #8b0000 — dark red (very weak)
+  { value: 0.45, r: 204, g: 0, b: 0 },       // #cc0000 — red (weak)
+  { value: 0.60, r: 255, g: 68, b: 68 },     // #ff4444 — bright red (fair)
+  { value: 0.75, r: 255, g: 107, b: 53 },    // #ff6b35 — orange-red (good)
+  { value: 0.85, r: 255, g: 152, b: 0 },     // #ff9800 — orange (strong)
+  { value: 1.0, r: 255, g: 235, b: 59 },     // #ffeb3b — yellow (excellent)
 ];
 
 /**