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Surveyed Throne Lagoon

#10a9c9
Notes

Surveyed Throne Lagoon (#10A9C9) 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 (190°, 85%, 43%) 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
#10a9c9
RGB
rgb(16, 169, 201)
HSL
hsl(190, 85%, 43%)
HWB
hwb(190 6% 21%)
OKLCH
oklch(67.9% 0.120 218.1)
P3
color(display-p3 0.3029 0.6529 0.7740)
HSV
hsv(190, 92%, 79%)
LAB
lab(63.92% -24.37 -26.40)
LCH
lch(63.92% 35.93 227.29)
CMYK
cmyk(92%, 16%, 0%, 21%)

Etymology

Surveyed
adjective

Old French surveer, to look upon — past-participle of survey. As a color modifier, surveyed implies a clear-and-measured-and-coordinated quality, the crisp color of Mason-Dixon-Line-and-Royal-Navy-Hydrographic scientific-and-cadastral land-and-sea surveying tradition. Sits at the crisp-and-mapped end of the grid, parallel to mapped and plotted in usage.

Throne
modifier

Latin thronus, seat-of-state. As a color modifier, throne implies a king-and-queen-ceremonial-seat quality, the visual register of Russian-Imperial-and-Tudor-Court hand-carved jeweled-and-gilt-and-velvet ceremonial-seat-of-state surfaces under Russian-Imperial-Romanov-and-Tudor-Court hand-carved ceremonial-seat candlelight. Sits at the modifier-and-cultural end of the grid, parallel to crown and manor 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.

#10a9c9
Original
#95a4cb
Protanopia
#7e94c9
Deuteranopia
#00b4b3
Tritanopia
#8b8b8b
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
2.78:1
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
7.54:1

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
##10A9C9
Display P3
Display P3
color(display-p3 0.3029 0.6529 0.7740)
P3 has subtle headroomOKLCH chroma 0.120

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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