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Lucid Luna Lagoon

#3aafce
Notes

Lucid Luna Lagoon (#3AAFCE) 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 (193°, 60%, 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
#3aafce
RGB
rgb(58, 175, 206)
HSL
hsl(193, 60%, 52%)
HWB
hwb(193 23% 19%)
OKLCH
oklch(70.3% 0.111 219.4)
P3
color(display-p3 0.3670 0.6770 0.7940)
HSV
hsv(193, 72%, 81%)
LAB
lab(66.53% -22.20 -25.11)
LCH
lch(66.53% 33.52 228.51)
CMYK
cmyk(72%, 15%, 0%, 19%)

Etymology

Lucid
adjective

Latin lūcidus, clear / bright — derived from lūx (light). As a color modifier, lucid implies a clear-and-readable quality where the hue is unambiguous and free of optical clutter. Sits at the crisp-and-clear end of the grid, parallel to pellucid and plain in usage.

Luna
modifier

Latin luna, moon. As a color modifier, luna implies a moonlit-and-silver-and-pale-night quality, the visual register of full-moon-and-Selene-Diana-Luna hand-moonlit-and-silver-and-pale-night full-moon-and-Selene-Diana-Luna-and-Mare-Tranquillitatis luna-and-moonlit-and-silver-and-pale-night surfaces under full-moon-and-Selene-Diana-Luna-and-Mare-Tranquillitatis night-meadow-and-tarn-and-monastic-cloister silver-night-light. Sits at the modifier-and-cosmic end of the grid, parallel to sol and terra 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.

#3aafce
Original
#9caad0
Protanopia
#879bce
Deuteranopia
#00b9b9
Tritanopia
#989898
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
2.56:1
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
8.20:1

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
##3AAFCE
Display P3
Display P3
color(display-p3 0.3670 0.6770 0.7940)
P3 has subtle headroomOKLCH chroma 0.111

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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