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Inscribed Toltec Turquoise

#42b8c9
Notes

Inscribed Toltec Turquoise (#42B8C9) is a true cyan with a cool character. It leans cool, sitting on the blue, green, and violet side of the wheel. Quiet and dependable, a fit for product UI and data visualization. Its HSL profile (188°, 56%, 52%) 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
#42b8c9
RGB
rgb(66, 184, 201)
HSL
hsl(188, 56%, 52%)
HWB
hwb(188 26% 21%)
OKLCH
oklch(72.4% 0.106 208.7)
P3
color(display-p3 0.3957 0.7120 0.7781)
HSV
hsv(188, 67%, 79%)
LAB
lab(69.22% -27.18 -18.23)
LCH
lch(69.22% 32.73 213.85)
CMYK
cmyk(67%, 8%, 0%, 21%)

Etymology

Inscribed
adjective

Latin īnscrībere, to write upon — past-participle of inscribe. As a color modifier, inscribed implies a clear-and-text-or-pattern-cut quality, the crisp color of Roman-Imperial-period monumental-stone inscription-and-monumental-text incised-relief. Sits at the crisp-and-incised end of the grid, parallel to etched and engraved in usage.

Toltec
modifier

Nahuatl Tolteca, Toltec. As a color modifier, toltec implies a Tula-and-Mesoamerican quality, the visual register of Toltec-civilization-of-Tula post-Classic Mesoamerican hand-carved Atlantean-warrior-and-feathered-serpent stone-monumental surfaces under Tula-Hidalgo-and-Chichen-Itza post-Classic Mesoamerican high-altitude light. Sits at the modifier-and-cultural end of the grid, parallel to aztec and olmec 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.

#42b8c9
Original
#a8b1ca
Protanopia
#95a3c9
Deuteranopia
#00c0bd
Tritanopia
#a0a0a0
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
2.35:1
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
8.93:1

Wide gamut

Display P3 representation

The CSS Color 4 wide-gamut form of this color. Both swatches render the same color on every display — the P3 form only diverges from sRGB when a designer pushes channels outside sRGB's reach.

sRGB hex
sRGB hex
##42B8C9
Display P3
Display P3
color(display-p3 0.3957 0.7120 0.7781)
P3 has subtle headroomOKLCH chroma 0.106

Moderately saturated colors gain a small bump in P3 — the difference is usually visible side-by-side on wide-gamut hardware but won't change the character of the color.

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