De Atramentis Atlantic Blue is a dusty blue-grey ink. It is suitable for corporate use. There is some subtle shading visible even using the EF nib. Overall, it's a well behaved ink. I drafted my review on a Field Notes memobook on two seperate days. I noticed the colour of the ink differs greatly on the two seperate days it took to draft my review. I'm not sure if it is due to the sun exposure or just the paper of the memobook. Anyone else has a similar experience?