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Flat Mute Lagoon

#18bfe0
Notes

Flat Mute Lagoon (#18BFE0) 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°, 81%, 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
#18bfe0
RGB
rgb(24, 191, 224)
HSL
hsl(190, 81%, 49%)
HWB
hwb(190 9% 12%)
OKLCH
oklch(74.3% 0.129 216.6)
HSV
hsv(190, 89%, 88%)
LAB
lab(71.44% -27.42 -27.47)
LCH
lch(71.44% 38.82 225.05)
CMYK
cmyk(89%, 15%, 0%, 12%)

Etymology

Flat
adjective

Old Norse flatr, flat / level. As a color modifier, flat implies a clear-and-evenly-spread quality where the hue carries the matte-finish visual register of unmodulated single-plane surface. Sits at the crisp-and-balanced end of the grid, parallel to level and even in usage.

Mute
modifier

Latin mutus, silent-or-dumb. As a color modifier, mute implies a hushed-and-tongue-stilled-and-quieted quality, the visual register of silent-film-and-monastic-mute tongue-stilled-and-cloister-quieted silent-film-and-monastic-and-cloister tongue-stilled-and-still-and-quiet surfaces under silent-film-and-monastic vigil-and-cloister hush-and-quiet vow-of-silence light. Sits at the modifier-and-mood end of the grid, parallel to hush and still 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.

#18bfe0
Original
#a9b9e2
Protanopia
#91a7e0
Deuteranopia
#00cbc9
Tritanopia
#9e9e9e
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
2.19:1
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
9.57:1

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Canvas