Ian Billings has information on this year’s postage rate changes and new stamps on his blog. The big news is that the basic rates of 60p for first-class mail and 50p for second-class mail are not changing. There are many other changes, though.
There will be three new standard Machins in new colors, 78p orchid mauve, 88p amber yellow and £1.88 sapphire blue. From Ian’s images, which I know are not exact, sapphire blue is a dark shade with a hint of gray, amber yellow looks very similar to the Matthews’ old gold, and orchid mauve looks like the current 5p ash pink, though a bit lighter.