diff --git a/stuff/maths/numeral-systems/colors-demo.html b/stuff/maths/numeral-systems/colors-demo.html
new file mode 100644
index 000000000..aa70b21db
--- /dev/null
+++ b/stuff/maths/numeral-systems/colors-demo.html
@@ -0,0 +1,25 @@
+<!DOCTYPE html>
+<html lang="en">
+
+<head>
+    <meta charset="UTF-8">
+    <meta name="viewport" content="width=device-width, initial-scale=1.0">
+    <title>Document</title>
+
+    <style>
+        body {
+            /* background-color: red; */
+            /* background-color: #FF0000; */
+            /* background-color: rgb(255, 0, 0); */
+            background-color: rgb(255 0 0);
+            /* background-color: rgb(100%, 0%, 0%); */
+            /* background-color: rgb(100% 0% 0%); */
+        }
+    </style>
+</head>
+
+<body>
+    <h1>hello colors</h1>
+</body>
+
+</html>
\ No newline at end of file
diff --git a/stuff/maths/compression.js b/stuff/maths/numeral-systems/compression.js
similarity index 100%
rename from stuff/maths/compression.js
rename to stuff/maths/numeral-systems/compression.js
diff --git a/stuff/maths/bases.txt b/stuff/maths/numeral-systems/number-bases-or-numeral-systems.txt
similarity index 71%
rename from stuff/maths/bases.txt
rename to stuff/maths/numeral-systems/number-bases-or-numeral-systems.txt
index 9ec96dd72..1a07d4fe4 100644
--- a/stuff/maths/bases.txt
+++ b/stuff/maths/numeral-systems/number-bases-or-numeral-systems.txt
@@ -16,4 +16,13 @@ DEC       BIN    TERNARY      OCTAL       HEX
  14      1110        112         16         E
  15      1111        120         17         F
  16     10000        121         20        10 
-...
\ No newline at end of file
+...
+
+
+R                       G                       B
+0-255                   0-255                   0-255                   DEC
+0000 0000 - 1111 1111   0000 0000 - 1111 1111   0000 0000 - 1111 1111   BIN
+0    0    - F    F      0    0    - F    F      0    0    - F    F      HEX
+
+CSS 
+color: #FF0000 | red | rgb(255, 0, 0)
\ No newline at end of file
