Named colours you know about.
Shades and Tints are both special cases of linked colours. A shade (as you know) has the same fundamental hue as its parent, but lets you alter its saturation and its "value" (brightness) - they can be both increased and decreased. A tint effectively only lets you make the colour less saturated (as if it was an ink you were diluting). "Linked to another colour" lets you inherit a specific set of components from the parent colour. The rules are fundamentally similar but change the way the colour changes when you change the parent.
Alex
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