Research tells us that those who suffer from autism spectrum disorders often see colors more intensely than those who don't have the disorder. For that reason, if you are planning a sensory garden for those with ASD you should keep in mind the way that certain colors can affect the emotions of those individuals.
Individuals with Autism Spectrum Disorders need colors that they find calming and soothing. You should avoid warm colors in these sensory gardens when possible. That means you don't plant the yellows, oranges, and reds, that do so well to catch attention. Instead you should focus on cool and pastel colors. Good colors include light blues, light greens, and particularly light pinks.
One additional color that you should avoid including in your sensory garden for those Autism Spectrum Disorder is white. White can be too overwhelming for these individuals. After all, white includes all wavelengths in the visual spectrum and can simply be too much for someone who already sees colors more intensely.
For sensory gardens for those with Autism Spectrum Disorder, calming light blues, greens, grays, and other natural muted colors are the way to go. Instead of vivid colors to draw interest, perhaps an object that adds visual interest would complement the light pink and blue flowers.