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Polished Drear Lagoon

#21b4d6
Notes

Polished Drear Lagoon (#21B4D6) 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 (191°, 73%, 48%) 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
#21b4d6
RGB
rgb(33, 180, 214)
HSL
hsl(191, 73%, 48%)
HWB
hwb(191 13% 16%)
OKLCH
oklch(71.3% 0.123 218.8)
P3
color(display-p3 0.3381 0.6956 0.8242)
HSV
hsv(191, 85%, 84%)
LAB
lab(67.89% -24.66 -27.47)
LCH
lch(67.89% 36.91 228.09)
CMYK
cmyk(85%, 16%, 0%, 16%)

Etymology

Polished
adjective

Latin polīre, to polish — past-participle of polish. As a color modifier, polished implies a clear-and-smooth-and-glossy quality where the hue carries the visual register of buffed-and-burnished smooth-finish surface. Sits at the crisp-and-finished end of the grid, parallel to burnished and gleaming in usage.

Drear
modifier

Old English drēor, gore-and-sorrow. As a color modifier, drear implies a bleak-and-cheerless-and-sorrowful quality, the visual register of Brontë-moorland-and-Hardy-heath-drear hand-bleak-and-cheerless-and-sorrowful Brontë-moorland-and-Hardy-heath-and-Wuthering drear-and-bleak-and-cheerless-and-sorrowful surfaces under Brontë-moorland-and-Hardy-heath-and-Wuthering rain-swept-and-low-cloud-and-empty-vista Yorkshire-and-Wessex-light. Sits at the modifier-and-mood end of the grid, parallel to bleak and gloom 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.

#21b4d6
Original
#9fafd8
Protanopia
#889ed6
Deuteranopia
#00bfbf
Tritanopia
#979797
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
2.45:1
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
8.56:1

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
##21B4D6
Display P3
Display P3
color(display-p3 0.3381 0.6956 0.8242)
P3 has subtle headroomOKLCH chroma 0.123

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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