Cordia sbucordata of the family Boraginaceae, native to Hawaii. Fairly closely related to bocote and with somewhat similar characteristics.
my samples: NOTE: these pics were all taken in very bright incandescent lighting ("soft white" at 2700K) colors will vary under other lighting conditions
both sides of a sample plank of kou / Cordia subcordata --- HUGE enlargements are present. This sample was loaned to me by David Clark whom I thank for this and other contributions to the site. This piece is from Indonesia.]
end grain and end grain closeup of the piece directly above