Aqua

Pure aqua is maximum-brightness cyan: electric, aquatic, unmistakable. A dark-mode specialist — on black it glows, on white it vanishes. Handle accordingly.

dark-mode accentstech highlightsdata visualization

Values in every format

HEX: #00ffff
RGB: rgb(0, 255, 255)
HSL: hsl(180, 100%, 50%)
OKLCH: oklch(0.905 0.155 194.8)
CMYK: cmyk(100%, 0%, 0%, 0%)

Hue family: Blue · closest CSS name: aqua. Convert this color

Perceptual shade scale

Eleven even steps from 50 to 950, computed in OKLCH — the starred stop is #00FFFF itself.

50#dffffe
100#b2fdfc
200 ★#00ffff
300#51e5e5
400#00cccc
500#00afaf
600#009595
700#007878
800#005f5f
900#004848
950#002d2d

Build a full system from #00FFFF

Harmonies with aqua

Complementary

Maximum contrast — use one side for action, the other sparingly.

#00ffff #ff0000

Analogous

Neighbors on the wheel — calm, cohesive, hard to get wrong.

#00ff80 #00ffff #007fff

Triadic

Three evenly spaced hues — vibrant, needs one clear leader.

#00ffff #ff00ff #ffff00

Measured contrast

on white1.25:1 · fails AA

on black16.75:1 · AA normal ✓

Check your own pairs