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Symmetrical Pegasus Lagoon

#39b2d2
Notes

Symmetrical Pegasus Lagoon (#39B2D2) is a true 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 (193°, 63%, 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
#39b2d2
RGB
rgb(57, 178, 210)
HSL
hsl(193, 63%, 52%)
HWB
hwb(193 22% 18%)
OKLCH
oklch(71.1% 0.113 219.5)
P3
color(display-p3 0.3698 0.6885 0.8093)
HSV
hsv(193, 73%, 82%)
LAB
lab(67.55% -22.60 -25.75)
LCH
lch(67.55% 34.26 228.73)
CMYK
cmyk(73%, 15%, 0%, 18%)

Etymology

Symmetrical
adjective

Greek symmetría, due-proportion — adjectival suffix -al, derived from sym-metron (with-measure). As a color modifier, symmetrical implies a clear-and-balanced-and-mirrored quality where the hue carries the visual register of bilateral-or-radial proportional symmetry. Sits at the crisp-and-balanced end of the grid, parallel to balanced and aligned 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.

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.

#39b2d2
Original
#9eadd4
Protanopia
#899ed2
Deuteranopia
#00bdbc
Tritanopia
#9b9b9b
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
2.48:1
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
8.47:1

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
##39B2D2
Display P3
Display P3
color(display-p3 0.3698 0.6885 0.8093)
P3 has subtle headroomOKLCH chroma 0.113

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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