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Poised Constantinople

#851ba1
Notes

Poised Constantinople (#851BA1) is a true violet with a jewel character. It carries the deep, saturated richness of a gemstone. Authoritative and slightly formal, it works well for type and heavy UI elements. Its HSL profile (287°, 71%, 37%) 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 green. For something softer, pull in its analogous neighbors on either side of the wheel.

HEX
#851ba1
RGB
rgb(133, 27, 161)
HSL
hsl(287, 71%, 37%)
HWB
hwb(287 11% 37%)
OKLCH
oklch(46.4% 0.205 317.7)
P3
color(display-p3 0.4787 0.1446 0.6091)
HSV
hsv(287, 83%, 63%)
LAB
lab(34.69% 60.41 -48.89)
LCH
lch(34.69% 77.72 321.02)
CMYK
cmyk(17%, 83%, 0%, 37%)

Etymology

Poised
adjective

Old French peser, to weigh — past-participle of poise. As a color modifier, poised implies a saturated-and-balanced-and-confident quality where the hue holds its position with elegant equilibrium. Sits at the bold-and-confident end of the grid, parallel to centered and composed.

Constantinople
noun

Byzantine imperial capital (founded 324 CE as Nova Roma, fell 1453 CE) — and the regulatory home of the purpura monopoly, where Tyrian purple was a state-controlled imperial dye after Justinian I's edict (530 CE). Constantinople color refers to an Empress Theodora San Vitale mosaic robe: a saturated, slightly cool deep violet with the matte finish of multi-bath Tyrian shellfish dye on Byzantine silk.

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.

#851ba1
Original
#004ba4
Protanopia
#20559e
Deuteranopia
#843b60
Tritanopia
#3b3b3b
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
7.87:1
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
2.67:1

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
##851BA1
Display P3
Display P3
color(display-p3 0.4787 0.1446 0.6091)
P3 has visible headroomOKLCH chroma 0.205

This color is chromatic enough that authoring it as P3 native (instead of clamping to sRGB) gives a perceptibly more saturated render on wide-gamut displays — modern Macs, iPhones, iPads, and most recent OLED laptops.

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