Added colours for teams

app/helpers/color_helper.rb

@@ -0,0 +1,73 @@
+module ColorHelper
+  # Generates a consistent, visually pleasing color based on an ID
+  # Uses the golden ratio to ensure good color distribution
+  def team_color(team_id)
+    # Use the golden ratio to create a well-distributed sequence of hues
+    golden_ratio_conjugate = 0.618033988749895
+    
+    # Use the team_id as a seed for the hue
+    h = (team_id.to_i * golden_ratio_conjugate) % 1
+    
+    # Convert to HSL color with fixed saturation and lightness for good UI colors
+    # Saturation: 65% - vibrant but not too intense
+    # Lightness: 55% - visible on both light and dark backgrounds
+    hsl_to_hex(h, 0.65, 0.55)
+  end
+  
+  # Returns a color object with various formats for a team
+  # This allows for more flexibility in how the color is used
+  def team_color_object(team_id)
+    h = (team_id.to_i * 0.618033988749895) % 1
+    s = 0.65
+    l = 0.55
+    
+    # Calculate RGB values
+    rgb = hsl_to_rgb(h, s, l)
+    hex = hsl_to_hex(h, s, l)
+    
+    {
+      hex: hex,                                       # #RRGGBB
+      rgb: "rgb(#{rgb[0]}, #{rgb[1]}, #{rgb[2]})",    # rgb(r,g,b)
+      hsl: "hsl(#{(h*360).round}, #{(s*100).round}%, #{(l*100).round}%)", # hsl(h,s%,l%)
+      light_bg: hsl_to_hex(h, s, 0.9),                # Lighter version for backgrounds
+      dark_bg: hsl_to_hex(h, s, 0.2),                 # Darker version for backgrounds
+      border: hsl_to_hex(h, s, 0.4)                   # Border color
+    }
+  end
+  
+  private
+  
+  # Convert HSL to Hex color
+  def hsl_to_hex(h, s, l)
+    r, g, b = hsl_to_rgb(h, s, l)
+    "##{r.to_s(16).rjust(2, '0')}#{g.to_s(16).rjust(2, '0')}#{b.to_s(16).rjust(2, '0')}"
+  end
+  
+  # Convert HSL to RGB values
+  def hsl_to_rgb(h, s, l)
+    # Convert HSL to RGB using standard algorithm
+    if s == 0
+      r = g = b = (l * 255).round
+    else
+      q = l < 0.5 ? l * (1 + s) : l + s - l * s
+      p = 2 * l - q
+      
+      r = (hue_to_rgb(p, q, h + 1/3.0) * 255).round
+      g = (hue_to_rgb(p, q, h) * 255).round
+      b = (hue_to_rgb(p, q, h - 1/3.0) * 255).round
+    end
+    
+    [r, g, b]
+  end
+  
+  # Helper function for HSL to RGB conversion
+  def hue_to_rgb(p, q, t)
+    t += 1 if t < 0
+    t -= 1 if t > 1
+    
+    return p + (q - p) * 6 * t if t < 1/6.0
+    return q if t < 1/2.0
+    return p + (q - p) * (2/3.0 - t) * 6 if t < 2/3.0
+    return p
+  end
+end