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Steady Lone Turquoise

#5de9de
Notes

Steady Lone Turquoise (#5DE9DE) is a true cyan with a vibrant character. It holds its own as a focal accent, carrying visual weight without tipping into neon territory. Its HSL profile (175°, 76%, 64%) places it in the highly saturated band at a mid lightness. Best used in small doses, like logos, CTAs, focus rings, or highlight text, where its saturation becomes a feature rather than noise. For a confident two-color system, pair it with its complementary red. For something softer, pull in its analogous neighbors on either side of the wheel.

HEX
#5de9de
RGB
rgb(93, 233, 222)
HSL
hsl(175, 76%, 64%)
HWB
hwb(175 36% 9%)
OKLCH
oklch(85.5% 0.121 187.9)
HSV
hsv(175, 60%, 91%)
LAB
lab(84.93% -40.14 -5.95)
LCH
lch(84.93% 40.57 188.44)
CMYK
cmyk(60%, 0%, 5%, 9%)

Etymology

Steady
adjective

Old English stede, place, position — drifted to mean firm and unmoving. Used as a color modifier since the seventeenth century for hues that read as reliable rather than dramatic. Steady gray, steady green: moderate saturation combined with optical calmness. Sits in the crisp-bucket center alongside settled.

Lone
modifier

Middle English lone, shortened from alone. As a color modifier, lone implies a solitary-and-singular-and-isolated quality, the visual register of Caspar-David-Friedrich-Wanderer-and-lone-pine hand-solitary-and-singular-and-isolated Caspar-David-Friedrich-Wanderer-and-lone-pine-and-Romantic-vista loned-and-solitary-and-singular-and-isolated surfaces under Caspar-David-Friedrich-Wanderer-and-lone-pine-and-Romantic-vista mountaintop-and-empty-shore single-figure-light. Sits at the modifier-and-mood end of the grid, parallel to void and drear in usage.

Turquoise
noun

The hydrated copper-aluminum phosphate mined in Persia and the American Southwest for thousands of years — the firuze of Iran, the chalchihuitl of Mesoamerica, the heart of Pueblo and Navajo silverwork. The color refers to a fine Sleeping Beauty turquoise from Arizona: a saturated, slightly green-shifted blue with the slight matrix of host-rock veining. Brighter than persian, lighter than cerulean.

Closest matches

The nearest named color in three reference sources, ranked by perceptual distance (ΔE76 in CIELAB). ΔE < 1 is imperceptible to most viewers; ΔE > 10 is clearly different. When two sources point to the same hex they’re merged into one tile; click any to open that color’s page.

Variations

Click any swatch to explore

Harmonies

Accessibility

Color-vision simulation

How this color appears to viewers with the four major color-vision-deficiency types. Computed via the Machado (2009) physiologically-based model. If a tile matches the original, the color reads the same to that viewer.

#5de9de
Original
#ddddde
Protanopia
#c8cddf
Deuteranopia
#00eee5
Tritanopia
#cacaca
Achromatopsia
WCAG contrast

The color used as foreground text against pure white and pure black, with the contrast ratio and WCAG 2.1 grade. Aim for AA (4.5:1) for body text and AA Large (3:1) for 18 pt+ headlines; AAA (7:1) is the gold standard for long-form reading surfaces.

The quick brown foxSample body text at normal size. The wcag minimum for body contrast is 4.5:1 (AA) or 7:1 (AAA).
Failon White
1.48:1
The quick brown foxSample body text at normal size. The wcag minimum for body contrast is 4.5:1 (AA) or 7:1 (AAA).
AAAon Black
14.18:1

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