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Open Syrup Ocean

#19cbda
Notes

Open Syrup Ocean (#19CBDA) 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 (185°, 79%, 48%) 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
#19cbda
RGB
rgb(25, 203, 218)
HSL
hsl(185, 79%, 48%)
HWB
hwb(185 10% 15%)
OKLCH
oklch(76.9% 0.128 204.5)
HSV
hsv(185, 89%, 85%)
LAB
lab(74.81% -35.08 -19.08)
LCH
lch(74.81% 39.93 208.55)
CMYK
cmyk(89%, 7%, 0%, 15%)

Etymology

Open
adjective

Old English open, unobstructed — used as a color modifier since the eighteenth century for hues that read as airy or uncrowded. Open blue, open green: moderate saturation combined with optical spaciousness, the slight visual breath of a hue that doesn't crowd the surface it covers. Sits at the crisp-bucket center alongside clear.

Syrup
modifier

Arabic sharāb, thick-sweet-drink. As a color modifier, syrup implies a thick-and-amber-and-pourable-sweet quality, the visual register of Vermont-maple-and-Levantine-rose-syrup hand-thick-and-amber-and-pourable-sweet Vermont-maple-and-Levantine-rose-syrup-and-French-grenadine syrup-and-thick-and-amber surfaces under Vermont-maple-and-Levantine-rose-syrup-and-French-grenadine Vermont-sugar-shack-and-Damascus-souk amber-pourable-light. Sits at the modifier-and-flavor end of the grid, parallel to malt and zest 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.

#19cbda
Original
#b9c2db
Protanopia
#a1b1db
Deuteranopia
#00d4cf
Tritanopia
#a6a6a6
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
1.98:1
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
10.60:1

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