Change evaluate button color

Signed-off-by: Kieran Fraser <Kieran.Fraser@ibm.com>

app.py

@@ -44,6 +44,7 @@ css = """
 div.svelte-15lo0d8>*, div.svelte-15lo0d8>.form > * {
     min-width: 0px !important;
 }
+.eval-bt { background-color: #3b74f4; color: white; }
 """
 
 def sample_CIFAR10():
@@ -269,7 +270,7 @@ with gr.Blocks(css=css, theme='Tshackelton/IBMPlex-DenseReadable') as demo:
                 max_iter = gr.Slider(minimum=1, maximum=10, label="Max iterations", value=4)
                 eps = gr.Slider(minimum=0.0001, maximum=1, label="Epslion", value=0.3) 
                 eps_steps = gr.Slider(minimum=0.0001, maximum=1, label="Epsilon steps", value=0.03) 
-                bt_eval_pgd = gr.Button("Evaluate")
+                bt_eval_pgd = gr.Button("Evaluate", elem_classes="eval-bt")
                 
             # Evaluation Output. Visualisations of success/failures of running evaluation attacks.
             with gr.Column(scale=5):
@@ -312,7 +313,7 @@ with gr.Blocks(css=css, theme='Tshackelton/IBMPlex-DenseReadable') as demo:
                 y_location = gr.Slider(minimum=1, maximum=32, label="Location (y)", value=1) 
                 patch_height = gr.Slider(minimum=1, maximum=32, label="Patch height", value=12) 
                 patch_width = gr.Slider(minimum=1, maximum=32, label="Patch width", value=12) 
-                eval_btn_patch = gr.Button("Evaluate")
+                eval_btn_patch = gr.Button("Evaluate", elem_classes="eval-bt")
                 
             # Evaluation Output. Visualisations of success/failures of running evaluation attacks.
             with gr.Column(scale=3):