Very large flat heads of creamy yellow flowers Jun-Aug (and later when the florets splay), grey-green foliage, 60cm....
The truth - the flowers are the colour of old crusted mustard (dubious 1960's seaside cafes), but the colour works...
Clear lemon yellow flowers May-Jul(Nov), good grey evergreen foliage, 60cm. Open sunny sites. Easy.
Like a cream flowered Achillea 'Moonshine'. Evergreen grey foliage and creamy yellow flowers May-Aug, 60cm. Sun.
Broad heads of strong pure red flowers Jun-Sep that keep their colour (maybe darken to crimson) as they age, 60cm.
Feathery grey foliage, pale yellow-cream flowers Jun-Sep(Nov), 50cm. Easy.
The foliage is thick and when young golden yellow, greening-up later, flowers very deep blue Sep-Oct, short 40cm.
Short 35cm, deep blue flowers Sep-Nov, foliage burnished green with darker green tips.
Dreamy clear pale blue flowers shade darker at edges Jul-Oct, good foliage, 1.2m.