improve typography and color docs

Author: ghislaineguerin

addon/styles/global.css

@@ -10,11 +10,13 @@
   --color-danger: #FFD8E1;
   --color-warning: #FCFFC9;
   --color-info: #E3EEFC;
+
   --text-preset-1: 1.5rem;
-  --text-preset-2: 2.5rem;
-  --text-preset-3: 4rem;
-  --text-preset-4: 6rem;
-  --text-preset-5: 8rem;
+  --text-preset-2: 2.25rem;
+  --text-preset-3: 3.375rem;
+  --text-preset-4: 5.063rem;
+  --text-preset-5: 7.594rem;
+
   --font-weight-1: 300;
   --font-weight-2: 400;
   --font-weight-3: 600; 

addon/styles/typography.css

@@ -71,6 +71,14 @@
   font-size: var(--text-preset-5);
 }
 
+h1, h2, h3 {
+  margin-bottom: var(--spacing-1);
+}
+
+p {
+  margin-bottom: var(--spacing-2);
+}
+
 .light {
   font-weight: var(--font-weight-1);
 }

docs/concepts/colours.md

@@ -1,12 +1,13 @@
 # Colours
 
-### Here we talk about the color scheme
+### Usage
+#### Legibility
+Website elements like text and icons should meet accesibility standards when used against coloured backgrounds. The following swatches contain a sample of each of the primary palette colours, along with recommendations for its usage and the acceptable contrast guidelines when coupled with text.
+
 
 ## Primary Colours
 The primary palette is applied across every page of the website and contains the brand, accent and neutral colours. The purpose of the primary palette is to keep uniformity across all pages while encouraging accessibility best practices.
 
-The following swatches contain a sample of each of the primary palette colours, along with recommendations for its usage and the acceptable contrast guidelines when coupled with text.
-
 <div class="layout-grid">
   <ColorPallet class="col-2-large" @color="#1A1A1A" @name="Dark Gray" @variable="--color-dark" @class-name="bg-dark" />
 

docs/concepts/typeography.md renamed to docs/concepts/typography.md

@@ -1,6 +1,13 @@
 # Typography
 
-## Sizes
+### Usage
+#### Legibility
+Text legibility is primarily affected by color. All text on the website should comply with the Web Content Accessibility Guidelines (WCAG 2.0) Level AA requirements.
+
+
+Please refer to the <a href="colours">Colours</a> section for more information on colour contrast and accessibility.
+
+### Sizes
 
 Use `.xsmall` for small headings or notice paragraphs.