obstacle blindly, and bursts forth aimlessly in every direction.

Yellow, if steadily gazed at in any geometrical form, has a
disturbing influence, and reveals in the colour an insistent,
aggressive character. [Footnote: It is worth noting that the
sour-tasting lemon and shrill-singing canary are both yellow.]
The intensification of the yellow increases the painful
shrillness of its note.

[Footnote: Any parallel between colour and music can only be
relative. Just as a violin can give various shades of tone,--so
yellow has shades, which can be expressed by various instruments.
But in making such parallels, I am assuming in each case a pure
tone of colour or sound, unvaried by vibration or dampers, etc.]

Yellow is the typically earthly colour. It can never have
profound meaning. An intermixture of blue makes it a sickly
colour. It may be paralleled in human nature, with madness, not
with melancholy or hypochondriacal mania, but rather with violent
raving lunacy.

The power of profound meaning is found in blue, and first in its
physical movements (1) of retreat from the spectator, (2) of
turning in upon its own centre. The inclination of blue to depth
is so strong that its inner appeal is stronger when its shade is
deeper.

Blue is the typical heavenly colour.

[Footnote: ...The halos are golden for emperors and prophets