The colour of the primary (4) is white, that of the secondary maroon.
The star [xi] Scorpionis is a neat double, the components 7".2 apart, their magnitudes 4-1/2 and 7-1/2, their colours white and grey.

This star is really triple, a fifth-magnitude star lying close to the primary.
In Ophiuchus, a constellation covering a wide space immediately above Scorpio, there are several fine doubles.

Among others-- 39 Ophiuchi, distance between components 12".1, their magnitudes 5-1/2 and 7-1/2, their colours orange and blue.
The star 70 Ophiuchi, a fourth-magnitude star on the right shoulder of Ophiuchus, is a noted double.

The distance between the components about 5-1/2", their magnitudes 4-1/2 and 7, the colours yellow and red.

The pair form a system whose period of revolution is about 95 years.
36 Ophiuchi (variable), distance 5".2, magnitudes 4-1/2 and 6-1/2, colours red and yellow.
[rho] Opiuchi, distance 4", colours yellow and blue, magnitudes 5 and 7.
Between [alpha] and [beta] Scorpionis the fine nebula 80 M may be looked for.