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Sterile Ave Lagoon

#30b8da
Notes

Sterile Ave Lagoon (#30B8DA) 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 (192°, 70%, 52%) 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
#30b8da
RGB
rgb(48, 184, 218)
HSL
hsl(192, 70%, 52%)
HWB
hwb(192 19% 15%)
OKLCH
oklch(72.7% 0.121 219.2)
P3
color(display-p3 0.3646 0.7114 0.8398)
HSV
hsv(192, 78%, 85%)
LAB
lab(69.45% -24.10 -27.24)
LCH
lch(69.45% 36.37 228.50)
CMYK
cmyk(78%, 16%, 0%, 15%)

Etymology

Sterile
adjective

Latin sterilis, barren / not-fertile — sharing root with Greek steiros (barren). As a color modifier, sterile implies a clear-and-medical-clean-and-stripped quality, the crisp color of operating-theater surgical-environment white-and-stainless-steel surfaces. Sits at the crisp-and-clean end of the grid, parallel to sanitary and hygienic in usage.

Ave
modifier

Latin ave, hail-or-greeting. As a color modifier, ave implies a Latin-greeting-and-Ave-Maria-and-Ave-Caesar quality, the visual register of Ave-Maria-and-Ave-Caesar-greeting hand-Latin-greeting-and-Ave-Maria-and-Ave-Caesar Ave-Maria-and-Ave-Caesar-greeting-and-Catholic-prayer-and-Roman-salute ave-and-Latin-greeting surfaces under Ave-Maria-and-Ave-Caesar-greeting-and-Catholic-prayer-and-Roman-salute Roman-arena-and-Catholic-liturgy hailing-greeting-light. Sits at the modifier-and-Latin end of the grid, parallel to salve and pax 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.

#30b8da
Original
#a3b3dc
Protanopia
#8ca3da
Deuteranopia
#00c3c3
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
2.33:1
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
8.99:1

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
##30B8DA
Display P3
Display P3
color(display-p3 0.3646 0.7114 0.8398)
P3 has subtle headroomOKLCH chroma 0.121

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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