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Sterile Via Ocean

#91f1f4
Notes

Sterile Via Ocean (#91F1F4) is a soft 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 (182°, 82%, 76%) places it in the highly saturated band at a light 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
#91f1f4
RGB
rgb(145, 241, 244)
HSL
hsl(182, 82%, 76%)
HWB
hwb(182 57% 4%)
OKLCH
oklch(90.0% 0.091 198.2)
P3
color(display-p3 0.6569 0.9357 0.9510)
HSV
hsv(182, 41%, 96%)
LAB
lab(89.61% -27.59 -10.36)
LCH
lch(89.61% 29.47 200.59)
CMYK
cmyk(41%, 1%, 0%, 4%)

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.

Via
modifier

Latin via, road-or-way. As a color modifier, via implies a Latin-road-and-Roman-Via-Appia quality, the visual register of Roman-Via-Appia-and-Via-Aemilia hand-Latin-road-and-Roman-Via-Appia Roman-Via-Appia-and-Via-Aemilia-and-Via-Egnatia via-and-Latin-road surfaces under Roman-Via-Appia-and-Via-Aemilia-and-Via-Egnatia Republican-Rome-and-imperial-road-network basalt-paved-Roman-road-light. Sits at the modifier-and-Latin end of the grid, parallel to arbor and domus in usage.

Ocean
noun

The body of saltwater that covers seventy percent of Earth's surface — a single connected mass divided by convention into Atlantic, Pacific, Indian, Southern, and Arctic. The color refers to the average reflectance of mid-depth temperate ocean: a saturated, slightly green-shifted deep blue with the optical depth of a body of water that absorbs all light below the photic zone. Deeper than mediterranean, cooler than peacock.

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.

#91f1f4
Original
#e5e9f4
Protanopia
#d3dcf5
Deuteranopia
#64f7f2
Tritanopia
#dddddd
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
1.30:1
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
16.09:1

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
##91F1F4
Display P3
Display P3
color(display-p3 0.6569 0.9357 0.9510)
P3 has subtle headroomOKLCH chroma 0.091

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.

Related Colors

Canvas