Create Conditional-Colors-Dax-CheatSheet.md

Author: ninmonkey

source-dax/Conditional-Colors-Dax-CheatSheet.md

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+## Static Measure to Test Syntax
+
+To use one, choose conditional formatting:
+
+- format style: field alpha
+- applies to: values only
+- which field: your measure
+
+Here's a bunch of options. Type `ctrl+/` to quickly comment the lines on and off to compare them.
+
+```ts
+[ Color Test ] =   
+    // note: alpha uses the range [ 0.0, 1.0 ]  to mean 0% to 100% visible
+    return
+        "#ff00ff1f" // magenta, 50%
+        // "#ff00ff"   // magenta
+        // "rgba( 255, 0, 255, 0.4 )"
+        // "rgb(255, 0, 255 )"
+        // "salmon"
+        // "hsla( 219, 68%, 20%, 0.5 )"
+        // "hsl( 219, 68%, 20% )"
+```
+
+```ts
+[ Conditional Alpha ] =
+    // alpha is in the range [0.0, 1.0]
+    var curDecimal = SELECTEDVALUE( Nums[Frac], 0 )
+    return 
+        "hsla(219, 68%, 20%," & curDecimal & ")"
+```
+```ts
+[ Conditional Rgb ] = 
+    // values are in the range [0, 255]
+    var curR = SELECTEDVALUE( Nums[Decimal], 255 ) 
+    var curG = SELECTEDVALUE( Nums[Decimal], 255 )
+    var curB = SELECTEDVALUE( Nums[Decimal], 255 )
+    return "rgb(" & curR
+            & ", " & curG
+            & ", " & curB
+            & ")"
+```
+
+## Docs describing the syntax
+
+- [using `HSL`](https://developer.mozilla.org/en-US/docs/Web/CSS/color_value/hsl)
+- [using `RGB`](https://developer.mozilla.org/en-US/docs/Web/CSS/color_value/rgb)
+- [using `LCH`](https://developer.mozilla.org/en-US/docs/Web/CSS/color_value/lch) ( Not currently enabled, maybe in the future? )