feat: Graphs Blue Color (#1597)

* Changed the humidity color on the graph to the same blue used for current in the power graph.

* Refactor: Centralized the blue used in both the Env and Pow metrics in CommonCharts.kt.

---------

Co-authored-by: James Rich <2199651+jamesarich@users.noreply.github.com>

app/src/main/java/com/geeksville/mesh/ui/components/CommonCharts.kt

@@ -73,6 +73,7 @@ object CommonCharts {
     const val LINE_LIMIT = 4
     const val TEXT_PAINT_ALPHA = 192
     const val MAX_PERCENT_VALUE = 100f
+    val INFANTRY_BLUE = Color(75, 119, 190)
 }
 
 private const val LINE_ON = 10f

app/src/main/java/com/geeksville/mesh/ui/components/EnvironmentMetrics.kt

@@ -65,10 +65,11 @@ import com.geeksville.mesh.model.TimeFrame
 import com.geeksville.mesh.ui.components.CommonCharts.X_AXIS_SPACING
 import com.geeksville.mesh.ui.components.CommonCharts.MS_PER_SEC
 import com.geeksville.mesh.ui.components.CommonCharts.DATE_TIME_FORMAT
+import com.geeksville.mesh.ui.components.CommonCharts.INFANTRY_BLUE
 
 private enum class Environment(val color: Color) {
     TEMPERATURE(Color.Red),
-    HUMIDITY(Color.Blue),
+    HUMIDITY(INFANTRY_BLUE),
     IAQ(Color.Green)
 }
 private val LEGEND_DATA = listOf(

app/src/main/java/com/geeksville/mesh/ui/components/PowerMetrics.kt

@@ -64,12 +64,13 @@ import com.geeksville.mesh.model.MetricsViewModel
 import com.geeksville.mesh.model.TimeFrame
 import com.geeksville.mesh.ui.components.CommonCharts.MS_PER_SEC
 import com.geeksville.mesh.ui.components.CommonCharts.DATE_TIME_FORMAT
+import com.geeksville.mesh.ui.components.CommonCharts.INFANTRY_BLUE
 import com.geeksville.mesh.util.GraphUtil
 import com.geeksville.mesh.util.GraphUtil.createPath
 
 @Suppress("MagicNumber")
 private enum class Power(val color: Color, val min: Float, val max: Float) {
-    CURRENT(Color(75, 119, 190), -500f, 500f),
+    CURRENT(INFANTRY_BLUE, -500f, 500f),
     VOLTAGE(Color.Red, 0f, 20f);
     /**
      * Difference between the metrics `max` and `min` values.