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Pellucid Flurry Lagoon

#40bdd7
Notes

Pellucid Flurry Lagoon (#40BDD7) 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 (190°, 65%, 55%) 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
#40bdd7
RGB
rgb(64, 189, 215)
HSL
hsl(190, 65%, 55%)
HWB
hwb(190 25% 16%)
OKLCH
oklch(74.1% 0.113 214.6)
P3
color(display-p3 0.3995 0.7312 0.8303)
HSV
hsv(190, 70%, 84%)
LAB
lab(71.14% -25.69 -22.98)
LCH
lch(71.14% 34.47 221.81)
CMYK
cmyk(70%, 12%, 0%, 16%)

Etymology

Pellucid
adjective

Latin pellūcidus, transparent — derived from per-lūcēre (to shine through). As a color modifier, pellucid implies a clear-and-translucent quality where the hue reads with optical clarity and minimal turbidity. Sits at the crisp-and-clear end of the grid, parallel to lucid and translucent in usage.

Flurry
modifier

Imitative origin, quick-burst-of-snow. As a color modifier, flurry implies a quick-burst-of-snow-and-light-and-fluttering quality, the visual register of Adirondack-and-Vermont-flurry hand-quick-burst-of-snow-and-light-and-fluttering Adirondack-and-Vermont-flurry-and-New-England-snow flurry-and-quick-burst-of-snow surfaces under Adirondack-and-Vermont-flurry-and-New-England-snow Adirondack-and-Green-Mountains-and-White-Mountains New-England-snow-light. Sits at the modifier-and-weather end of the grid, parallel to slush and thaw 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.

#40bdd7
Original
#aab7d8
Protanopia
#95a7d7
Deuteranopia
#00c7c5
Tritanopia
#a4a4a4
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
2.22:1
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
9.48:1

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
##40BDD7
Display P3
Display P3
color(display-p3 0.3995 0.7312 0.8303)
P3 has subtle headroomOKLCH chroma 0.113

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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