diff --git a/src/app.rs b/src/app.rs
index 20cd29f..019380d 100644
--- a/src/app.rs
+++ b/src/app.rs
@@ -1084,7 +1084,7 @@ struct PressureColorRange {
 
 // The shader begins its orange-to-red transition at intensity 0.66.  With this
 // gamma, a raw cell value at 80% of its configured range maps to that point.
-const PRESSURE_COLOR_GAMMA: f32 = 1.86;
+const PRESSURE_COLOR_GAMMA: f32 = 1.5;
 
 impl PressureColorRange {
     const fn new(min: u32, max: u32) -> Self {