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Tucked Pegasus Ocean

#21bdbd
Notes

Tucked Pegasus Ocean (#21BDBD) 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 (180°, 70%, 44%) 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
#21bdbd
RGB
rgb(33, 189, 189)
HSL
hsl(180, 70%, 44%)
HWB
hwb(180 13% 26%)
OKLCH
oklch(72.5% 0.119 194.9)
P3
color(display-p3 0.3540 0.7304 0.7357)
HSV
hsv(180, 83%, 74%)
LAB
lab(69.75% -36.88 -10.91)
LCH
lch(69.75% 38.46 196.49)
CMYK
cmyk(83%, 0%, 0%, 26%)

Etymology

Tucked
adjective

Old English tūcian, to torment / pull — past-participle of tuck. As a color modifier, tucked implies a clear-and-fitted-and-arranged quality where the hue carries the visual register of carefully-tucked-and-neatly-fitted shirt-into-trouser dress-attire. Sits at the crisp-and-finished end of the grid, parallel to trim and pressed in usage.

Pegasus
modifier

Greek Πήγασος, winged-horse-of-myth. As a color modifier, pegasus implies a winged-horse-and-Great-Square quality, the visual register of Pegasus-Great-Square-and-winged-horse hand-winged-horse-and-Great-Square Pegasus-Great-Square-and-winged-horse-and-autumn-Pegasus pegasus-and-winged-horse-and-Great-Square surfaces under Pegasus-Great-Square-and-winged-horse-and-autumn-Pegasus October-and-November-autumn-zenith autumn-constellation-light. Sits at the modifier-and-cosmic end of the grid, parallel to cygnus and draco 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.

#21bdbd
Original
#b0b3bd
Protanopia
#9ba4be
Deuteranopia
#00c3bd
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
2.31:1
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
9.08:1

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
##21BDBD
Display P3
Display P3
color(display-p3 0.3540 0.7304 0.7357)
P3 has subtle headroomOKLCH chroma 0.119

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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