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Smooth Icicle Lagoon

#4cbccd
Notes

Smooth Icicle Lagoon (#4CBCCD) 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 (188°, 56%, 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
#4cbccd
RGB
rgb(76, 188, 205)
HSL
hsl(188, 56%, 55%)
HWB
hwb(188 30% 20%)
OKLCH
oklch(73.8% 0.103 209.0)
P3
color(display-p3 0.4219 0.7278 0.7939)
HSV
hsv(188, 63%, 80%)
LAB
lab(70.81% -26.41 -18.00)
LCH
lch(70.81% 31.96 214.27)
CMYK
cmyk(63%, 8%, 0%, 20%)

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.

Icicle
modifier

Old English īsgicel, ice-and-icicle. As a color modifier, icicle implies a hanging-ice-and-eaves-frozen-drip quality, the visual register of Alpine-eaves-and-Norwegian-stave-icicle hand-hanging-ice-and-eaves-frozen-drip Alpine-eaves-and-Norwegian-stave-icicle-and-Cairngorm-ledge icicle-and-hanging-ice-and-eaves-frozen-drip surfaces under Alpine-eaves-and-Norwegian-stave-icicle-and-Cairngorm-ledge Alpine-Dolomites-and-Norwegian-stave-church frozen-drip-light. Sits at the modifier-and-weather end of the grid, parallel to floe and berg 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.

#4cbccd
Original
#adb5ce
Protanopia
#99a7cd
Deuteranopia
#00c4c1
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
2.24:1
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
9.38:1

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
##4CBCCD
Display P3
Display P3
color(display-p3 0.4219 0.7278 0.7939)
P3 has subtle headroomOKLCH chroma 0.103

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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