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Placid Sprite Turquoise

#55e3d8
Notes

Placid Sprite Turquoise (#55E3D8) 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°, 72%, 61%) places it in the balanced band at a mid lightness. It works across type, buttons, and borders, saturated enough to feel deliberate but balanced enough to not fight the rest of the palette. 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
#55e3d8
RGB
rgb(85, 227, 216)
HSL
hsl(175, 72%, 61%)
HWB
hwb(175 33% 11%)
OKLCH
oklch(83.7% 0.122 187.9)
HSV
hsv(175, 63%, 89%)
LAB
lab(82.82% -40.32 -5.93)
LCH
lch(82.82% 40.75 188.36)
CMYK
cmyk(63%, 0%, 5%, 11%)

Etymology

Placid
adjective

Latin placidus, gentle / quiet — derived from placēre (to please). As a color modifier, placid implies a clear-and-unruffled quality where the hue carries the visual register of mirror-smooth lake-surface in windless mid-morning. Sits at the crisp-and-calm end of the grid, parallel to serene and peaceful in usage.

Sprite
modifier

Latin spiritus, spirit-or-elf. As a color modifier, sprite implies a fairy-elf-and-quick-and-impish quality, the visual register of English-folk-sprite-and-Shakespearean-Puck hand-fairy-elf-and-quick-and-impish English-folk-sprite-and-Shakespearean-Puck-and-Midsummer-Night sprite-and-fairy-elf-and-quick-and-impish surfaces under English-folk-sprite-and-Shakespearean-Puck-and-Midsummer-Night greenwood-and-elven-meadow fairy-revel-light. Sits at the modifier-and-myth end of the grid, parallel to pixie and faun 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.

#55e3d8
Original
#d7d7d8
Protanopia
#c2c8d9
Deuteranopia
#00e8df
Tritanopia
#c4c4c4
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
1.57:1
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
13.37:1

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