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Practical Sigh Lagoon

#19c3e1
Notes

Practical Sigh Lagoon (#19C3E1) 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 (189°, 80%, 49%) 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
#19c3e1
RGB
rgb(25, 195, 225)
HSL
hsl(189, 80%, 49%)
HWB
hwb(189 10% 12%)
OKLCH
oklch(75.3% 0.129 214.4)
P3
color(display-p3 0.3573 0.7535 0.8678)
HSV
hsv(189, 89%, 88%)
LAB
lab(72.67% -29.02 -26.13)
LCH
lch(72.67% 39.05 222.00)
CMYK
cmyk(89%, 13%, 0%, 12%)

Etymology

Practical
adjective

Greek praktikós, practical — adjectival suffix -al. As a color modifier, practical implies a clear-and-purpose-fit-and-everyday quality where the hue carries the visual register of Shaker-and-Quaker utilitarian-and-functional everyday-life craft. Sits at the crisp-and-functional end of the grid, parallel to functional and workmanlike in usage.

Sigh
modifier

Middle English sighen, to-breathe-out-audibly. As a color modifier, sigh implies a breathed-out-and-released-and-wistful quality, the visual register of Romantic-poet-and-pining-lover-sigh hand-breathed-out-and-released-and-pining Romantic-poet-and-pining-lover-and-bedside-vigil sighed-and-released-and-breathed-out surfaces under Romantic-poet-and-pining-lover candle-lit-and-bedside-vigil window-and-balcony-light. Sits at the modifier-and-mood end of the grid, parallel to yearn and brood in usage.

Lagoon
noun

A shallow body of saltwater partially or fully enclosed by a barrier — coral atoll lagoons in the Pacific, Venice's Laguna Veneta, the Florida Keys' backcountry. The color refers to the average reflectance of a calm tropical lagoon at midday: a saturated, slightly muted blue-green with the optical clarity of shallow water over white sand. Brighter than reef, cooler than aquamarine, with the postcard weight of a Pacific atoll seen from above.

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.

#19c3e1
Original
#aebce3
Protanopia
#95abe1
Deuteranopia
#00cecc
Tritanopia
#a1a1a1
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
2.11:1
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
9.93:1

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
##19C3E1
Display P3
Display P3
color(display-p3 0.3573 0.7535 0.8678)
P3 has subtle headroomOKLCH chroma 0.129

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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