As the sun nears the horizon, the grassland reveals itself.

Note the shift of colours towards red. That’s largely because cheatgrass, which has now gone to seed, dominates for a few weeks, but look at the green of the blown salsify.

Look how in the vetch below the reds and greens meet, as expressions of one band of radiation.

Only blue is stronger, but it has gone purple.  Still blue, but blue-purple. It, too, is one with red and green.

And even the yellow of the young seeds of the curly dock!

That’s four colours at once, all expressions of the same colour. I would call that the sun’s presence, here.