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Placid Tied Lagoon

#38bfdf
Notes

Placid Tied Lagoon (#38BFDF) 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 (191°, 72%, 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
#38bfdf
RGB
rgb(56, 191, 223)
HSL
hsl(191, 72%, 55%)
HWB
hwb(191 22% 13%)
OKLCH
oklch(74.7% 0.120 217.6)
P3
color(display-p3 0.3886 0.7386 0.8598)
HSV
hsv(191, 75%, 87%)
LAB
lab(71.84% -25.18 -26.28)
LCH
lch(71.84% 36.39 226.22)
CMYK
cmyk(75%, 14%, 0%, 13%)

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.

Tied
modifier

Old English tīgan, to-tie or to-bind. As a color modifier, tied implies a hand-tied-and-knotted quality, the visual register of hand-tied-and-knotted-rope-and-string hand-tied-and-knotted-fishing-net-and-shoelace-and-bow hand-tied-and-knotted-rope-and-cord surfaces under hand-tied-and-knotted-rope-and-cord working-light. Sits at the modifier-and-texture end of the grid, parallel to sewn and knot 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.

#38bfdf
Original
#aab9e1
Protanopia
#94a9df
Deuteranopia
#00cac9
Tritanopia
#a5a5a5
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
2.17:1
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
9.69:1

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
##38BFDF
Display P3
Display P3
color(display-p3 0.3886 0.7386 0.8598)
P3 has subtle headroomOKLCH chroma 0.120

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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