colors
Back to gallery

Surveyed Lux Robin

#1b5964
Notes

Surveyed Lux Robin (#1B5964) is a deep 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 (189°, 57%, 25%) places it in the balanced band at a dark lightness. It works well as a headline, icon, or deep background in an otherwise light layout, pairing cleanly with cream, bone, and warm neutrals. 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
#1b5964
RGB
rgb(27, 89, 100)
HSL
hsl(189, 57%, 25%)
HWB
hwb(189 11% 61%)
OKLCH
oklch(43.0% 0.064 211.7)
P3
color(display-p3 0.1783 0.3440 0.3863)
HSV
hsv(189, 73%, 39%)
LAB
lab(34.59% -15.48 -12.06)
LCH
lch(34.59% 19.62 217.93)
CMYK
cmyk(73%, 11%, 0%, 61%)

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.

Lux
modifier

Latin lux, light. As a color modifier, lux implies a Latin-light-and-Fiat-Lux-and-Lux-Aeterna quality, the visual register of Genesis-Fiat-Lux-and-Lux-Aeterna hand-Latin-light-and-Fiat-Lux-and-Lux-Aeterna Genesis-Fiat-Lux-and-Lux-Aeterna-and-Requiem-mass lux-and-Latin-light-and-Fiat-Lux surfaces under Genesis-Fiat-Lux-and-Lux-Aeterna-and-Requiem-mass Vulgate-and-Tridentine-Mass primal-light. Sits at the modifier-and-Latin end of the grid, parallel to ignis and opus in usage.

Robin
noun

The American robin (Turdus migratorius) — though the color refers not to the bird's red breast but to the egg, robin's-egg blue, a pale slightly green-shifted blue produced by biliverdin pigment in the eggshell. The color is the inside surface of a fresh robin's nest at peak laying: a soft, slightly green-shifted pale blue with the matte finish of avian eggshell. Lighter than aqua, cooler than turquoise.

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.

#1b5964
Original
#505665
Protanopia
#464e64
Deuteranopia
#005e5c
Tritanopia
#4d4d4d
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).
AAAon White
7.90:1
The quick brown foxSample body text at normal size. The wcag minimum for body contrast is 4.5:1 (AA) or 7:1 (AAA).
Failon Black
2.66:1

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
##1B5964
Display P3
Display P3
color(display-p3 0.1783 0.3440 0.3863)
Inside sRGBOKLCH chroma 0.064

This color sits well within the sRGB cube. P3 and sRGB share the gray axis and most desaturated tones, so a P3 display renders this identically to an sRGB display.

Related Colors

Canvas