style(colorful-asri): reduce background color opacity for chips

- Decrease the opacity of chip background colors to improve readability and visual balance
- This change affects both light and dark mode styles

style/features/colorful-asri.scss

@@ -379,7 +379,7 @@
     @for $i from 1 through 10 {
         .b3-chip[style*="background-color:var(--b3-font-background#{$i + 3});color:var(--b3-font-color#{$i + 3})"] {
             color: oklch(.6 .2 calc(360 / 10 * #{ $i } + 30)) !important;
-            background-color: oklch(from var(--b3-font-background#{$i + 3}) 0.96 c h) !important;
+            background-color: oklch(from var(--b3-font-background#{$i + 3}) 0.96 c h / .8) !important;
 
             @include darkmode-counterpart {
                 color: oklch(0.85 0.12 calc(360 / 10 * #{ $i } + 30)) !important;