## 10 colors that show why good color science matters

How humans perceive difference between colors is not the same as the mathematical distance between two colors. And we should always optimise for human perception!

If you search *Nearest Color* for `#008000`

in the Tailwind palette, you get the Tailwind class ` lime-700`

. But with a mathematical distance algorithm, you'll get
`green-800`

.

`#008000`

Human perception

lime-700

Mathematical distance

green-800

Most color-sighted humans would say that the `lime-700`

is closer to the original color than `green-800`

. Read more about the science of this.

**Here are 9 more examples** of colors that show how tools like
*Nearest Color* that use human perception of color difference help you
find the right color.

`#00FF00`

Human perception

lime-400

Mathematical distance

green-500

`#4682B4`

Human perception

cyan-600

Mathematical distance

slate-500

`#CD853F`

Human perception

yellow-600

Mathematical distance

orange-400

`#5F9EA0`

Human perception

teal-600

Mathematical distance

slate-500

`#BA55D3`

Human perception

fuchsia-600

Mathematical distance

purple-500

`#00FFFF`

Human perception

cyan-300

Mathematical distance

cyan-400

`#ee5333`

Human perception

orange-600

Mathematical distance

red-500

`#00BFFF`

Human perception

sky-400

Mathematical distance

sky-500

`#FF8C00`

Human perception

orange-400

Mathematical distance

amber-500

Hopefully, you found this useful! Most color-sighted humans would see the colors on the left – the Tailwind classes found by Nearest Color – as closer to the input color than the colors on the right.

### A bit about the science

The mathematical distance approach to finding the closest color is to find the Euclidean distance of colors in sRGB. Because sRGB doesn't match how we perceive colours, two colors with the same Euclidean distance can look very different to color-sighted humans. Read more about Euclidean distance.

DeltaE is the name for the family of formulas that have been developed to find the difference between colors according to human perception. Humans are more sensitive to some colors than to others. Read more about DeltaE and about how humans perceive color difference.