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Vitreous Mace Lagoon

#3bb4d2
Notes

Vitreous Mace Lagoon (#3BB4D2) 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 (192°, 63%, 53%) 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
#3bb4d2
RGB
rgb(59, 180, 210)
HSL
hsl(192, 63%, 53%)
HWB
hwb(192 23% 18%)
OKLCH
oklch(71.6% 0.112 218.1)
P3
color(display-p3 0.3765 0.6963 0.8098)
HSV
hsv(192, 72%, 82%)
LAB
lab(68.18% -23.37 -24.77)
LCH
lch(68.18% 34.05 226.67)
CMYK
cmyk(72%, 14%, 0%, 18%)

Etymology

Vitreous
adjective

Latin vitreus, glass-like — derived from vitrum (glass). As a color modifier, vitreous implies a clear-and-glassy quality where the hue carries the optical clarity of polished crown-glass. Sits at the crisp-and-clear end of the grid, parallel to pellucid and crystalline in usage.

Mace
modifier

Latin macir, outer-aril-of-nutmeg. As a color modifier, mace implies a Banda-Islands-aril-and-orange-red-spice quality, the visual register of Banda-Islands-and-Spice-Islands-mace hand-Banda-Islands-aril-and-orange-red-spice Banda-Islands-and-Spice-Islands-mace-and-Maluku-aril mace-and-Banda-Islands-aril surfaces under Banda-Islands-and-Spice-Islands-mace-and-Maluku-aril Banda-Islands-and-Run-and-Maluku Spice-Islands-aril-light. Sits at the modifier-and-flavor end of the grid, parallel to nutmeg and clove 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.

#3bb4d2
Original
#a1afd4
Protanopia
#8ca0d2
Deuteranopia
#00bebd
Tritanopia
#9c9c9c
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
2.43:1
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
8.65:1

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
##3BB4D2
Display P3
Display P3
color(display-p3 0.3765 0.6963 0.8098)
P3 has subtle headroomOKLCH chroma 0.112

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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