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Balanced Horus Lagoon

#15b5d3
Notes

Balanced Horus Lagoon (#15B5D3) 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 (189°, 82%, 45%) 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
#15b5d3
RGB
rgb(21, 181, 211)
HSL
hsl(189, 82%, 45%)
HWB
hwb(189 8% 17%)
OKLCH
oklch(71.3% 0.124 215.7)
P3
color(display-p3 0.3286 0.6993 0.8133)
HSV
hsv(189, 90%, 83%)
LAB
lab(67.95% -26.86 -25.73)
LCH
lch(67.95% 37.20 223.76)
CMYK
cmyk(90%, 14%, 0%, 17%)

Etymology

Balanced
adjective

The past participle of balance, to weigh evenly. Used as a color modifier since the eighteenth century for hues that read as neither overcommitted nor restrained. Balanced sage, balanced taupe: moderate saturation combined with optical equilibrium. Sits at the crisp-bucket center alongside even.

Horus
modifier

Egyptian Heru, falcon-headed-sky-god. As a color modifier, horus implies a falcon-headed-and-Eye-of-Horus quality, the visual register of Egyptian-Horus-and-Edfu-temple hand-falcon-headed-and-Eye-of-Horus Egyptian-Horus-and-Edfu-temple-and-falcon-pharaoh horus-and-falcon-headed-and-Eye-of-Horus surfaces under Egyptian-Horus-and-Edfu-temple-and-falcon-pharaoh Edfu-Aswan-temple-and-falcon-throne falcon-eye-light. Sits at the modifier-and-myth end of the grid, parallel to isis and thoth 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.

#15b5d3
Original
#a1afd5
Protanopia
#899ed3
Deuteranopia
#00c0be
Tritanopia
#959595
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
8.58:1

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
##15B5D3
Display P3
Display P3
color(display-p3 0.3286 0.6993 0.8133)
P3 has subtle headroomOKLCH chroma 0.124

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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