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Smooth Suave Lagoon

#37c1dc
Notes

Smooth Suave Lagoon (#37C1DC) 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°, 70%, 54%) 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
#37c1dc
RGB
rgb(55, 193, 220)
HSL
hsl(190, 70%, 54%)
HWB
hwb(190 22% 14%)
OKLCH
oklch(75.0% 0.119 214.1)
P3
color(display-p3 0.3902 0.7463 0.8494)
HSV
hsv(190, 75%, 86%)
LAB
lab(72.31% -27.24 -23.94)
LCH
lch(72.31% 36.26 221.32)
CMYK
cmyk(75%, 12%, 0%, 14%)

Etymology

Smooth
adjective

Old English smōþ, level, polished — used as a color modifier since the seventeenth century for hues that read as continuous without texture or break. Smooth tan, smooth gray: moderate saturation combined with optical evenness. Sits in the crisp-bucket alongside even.

Suave
modifier

French suave, smooth / sweet. As a color modifier, suave implies a smooth-and-polished-and-elegant quality, the visual register of Belle-Époque-and-Mid-Century-Modern polished-and-elegant-and-smooth Belle-Époque-and-Mid-Century-Modern interior-decoration smooth-and-polished surfaces under Belle-Époque-and-Mid-Century-Modern smooth-and-polished elegance light. Sits at the modifier-and-texture end of the grid, parallel to sleek and gloss 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.

#37c1dc
Original
#adbbde
Protanopia
#97aadc
Deuteranopia
#00cbc9
Tritanopia
#a6a6a6
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
2.14:1
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
9.82:1

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
##37C1DC
Display P3
Display P3
color(display-p3 0.3902 0.7463 0.8494)
P3 has subtle headroomOKLCH chroma 0.119

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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