Contrast
Contrast is the difference in luminance or color that makes an object (or its representation in an image or display) distinguishable.
...
Contrast Ratio | Level | Text Color | Background Color | Example | |
|---|---|---|---|---|---|
| 1 | AAA |
|
| example | |
| 2 | AA |
|
| example | |
| 3 | AALG |
|
| example | |
| 4 | FAIL |
|
| example |
As you can see above in the, example column of the above table, rows three and four are more difficult to read than rows one and two.
According to the W3C WCAG 2.0:
...