You can't beat the Malabrigo colors.
And if you want a machine washable yarn at a fine gauge, Mechita is a lovely choice.
It is recommended between 7-8 sts/inch and features 420 yds/100 gm sk.
We also stock the Rios worsted, Mecha bulky, Arroyo dk and sock weights which you can access thru the "Other Malabrigo Yarns" link above.
For other nice yarn options featuring gorgeous colors in very different ranges but at this similar gauge are Fino by Manos del Uruguay and Nuble by Araucania. Both these options are silk and wool and not machine washable.