diff --git a/lib/phlex/variants.rb b/lib/phlex/variants.rb
index 16f58fc..283dd42 100644
--- a/lib/phlex/variants.rb
+++ b/lib/phlex/variants.rb
@@ -38,7 +38,7 @@ def build_variants_style(variants)
 
             next value if value
 
-            # doesn't raise error when passing false for variant with only true/:yes option
+            # doesn't raise error when passing false for variant with only true option
             next if option == false && options.has_key?(true)
           end
 
@@ -138,12 +138,13 @@ def initialize(view_class, variant_name)
 
       def method_missing(name, *args) # standard:disable Style/MissingRespondToMissing
         option = name.to_sym
-        view_class::STYLE_VARIANTS[variant_name][option] = args
 
         if option == :yes
           view_class::STYLE_VARIANTS[variant_name][true] = args
         elsif option == :no
           view_class::STYLE_VARIANTS[variant_name][false] = args
+        else
+          view_class::STYLE_VARIANTS[variant_name][option] = args
         end
       end
     end
diff --git a/spec/phlex/variants_spec.rb b/spec/phlex/variants_spec.rb
index 78e78f4..859ff25 100644
--- a/spec/phlex/variants_spec.rb
+++ b/spec/phlex/variants_spec.rb
@@ -196,13 +196,20 @@ def view_template
 
     expect(example.build_style).to eq "btn-normal"
     expect(example.build_style(outline: true, full: false)).to eq "btn-normal btn-outline btn-fit"
-    expect(example.build_style(loading: :yes, full: :no)).to eq "btn-loading btn-fit"
+
+    expect do
+      example.build_style(loading: :yes)
+    end.to raise_error("Option :yes for :loading variant doesn't exist. Valid options are: [true, false]")
   end
 
-  it "doesn't raise error when passing false for a variant with only true/:yes options" do
+  it "doesn't raise error when passing false for a boolean variant without 'false' option" do
     example = phlex_class do
       style do
         variants do
+          color do
+            red "btn-red"
+          end
+
           outline do
             yes "btn-outline"
           end
@@ -211,6 +218,10 @@ def view_template
     end
 
     expect(example.build_style(outline: false)).to eq ""
+
+    expect do
+      example.build_style(color: false)
+    end.to raise_error("Option false for :color variant doesn't exist. Valid options are: [:red]")
   end
 
   it "ignores nil variants" do