docs: add AstroPaper 2 dark theme lower contrast

src/content/blog/predefined-color-schemes.md

@@ -75,6 +75,21 @@ html[data-theme="light"] {
 
 Light color scheme has to be defined as `html[data-theme="dark"]`.
 
+### AstroPaper 1 original Dark Theme
+
+![AstroPaper 1 default dark theme](https://user-images.githubusercontent.com/53733092/215769153-13b0ad8d-5ba2-44b1-af06-e5ae61293f62.png)
+
+```css
+html[data-theme="dark"] {
+  --color-fill: 47, 55, 65;
+  --color-text-base: 230, 230, 230;
+  --color-accent: 26, 217, 217;
+  --color-card: 63, 75, 90;
+  --color-card-muted: 89, 107, 129;
+  --color-border: 59, 70, 85;
+}
+```
+
 ### Deep Oyster
 
 ![deep-oyster-color-scheme](https://user-images.githubusercontent.com/53733092/192314524-45ec5904-3d8f-450a-9edf-1e32c5e11d6c.png)
@@ -105,17 +120,33 @@ html[data-theme="dark"] {
 }
 ```
 
-### Astro dark
+### Astro dark (High Contrast)
 
 ![astro-dark-color-scheme](https://user-images.githubusercontent.com/53733092/215680520-59427bb0-f4cb-48c0-bccc-f182a428d72d.svg)
 
 ```css
 html[data-theme="dark"] {
-  --color-fill: 16, 23, 42;
+  --color-fill: 16, 23, 42; /* higher contrast bgColor */
+  --color-fill: 33, 39, 55;
+  --color-text-base: 234, 237, 243;
+  --color-accent: 255, 107, 1;
+  --color-card: 27, 39, 70;
+  --color-card-muted: 138, 51, 2;
+  --color-border: 171, 75, 8;
+}
+```
+
+### Astro dark (New default dark theme in AstroPaper 2)
+
+![new dark color scheme - low contrast](https://user-images.githubusercontent.com/53733092/215772856-d5b7ae35-ddaa-4ed6-b0bf-3fa5dbcf834c.png)
+
+```css
+html[data-theme="dark"] {
+  --color-fill: 33, 39, 55; /* lower contrast bgColor */
   --color-text-base: 234, 237, 243;
-  --color-accent: 254, 93, 1;
+  --color-accent: 255, 107, 1;
   --color-card: 27, 39, 70;
   --color-card-muted: 138, 51, 2;
-  --color-border: 141, 56, 8;
+  --color-border: 171, 75, 8;
 }
 ```