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Cavalier Kilt Ultramarine

#1b43ac
Notes

Cavalier Kilt Ultramarine (#1B43AC) is a true azure 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 (223°, 73%, 39%) 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 amber. For something softer, pull in its analogous neighbors on either side of the wheel.

HEX
#1b43ac
RGB
rgb(27, 67, 172)
HSL
hsl(223, 73%, 39%)
HWB
hwb(223 11% 33%)
OKLCH
oklch(42.7% 0.174 264.2)
P3
color(display-p3 0.1472 0.2592 0.6499)
HSV
hsv(223, 84%, 67%)
LAB
lab(32.31% 27.03 -59.82)
LCH
lch(32.31% 65.64 294.32)
CMYK
cmyk(84%, 61%, 0%, 33%)

Etymology

Cavalier
adjective

Italian cavaliere, horseman / knight via Latin caballārius. As a color modifier, cavalier implies a saturated-and-chivalrous-and-aristocratic quality, the deep-rich color of English-Civil-War royalist Cavalier military-faction velvet-and-lace-and-feathered-hat livery. Sits at the bold-and-chivalrous end of the grid, parallel to gallant and knightly.

Kilt
modifier

Scots kilt, Highland-pleated-skirt. As a color modifier, kilt implies a Highland-tartan-and-pleated-skirt quality, the visual register of Highland-tartan-and-Black-Watch-kilt hand-Highland-tartan-and-pleated-skirt Highland-tartan-and-Black-Watch-kilt-and-clan-Macleod kilt-and-Highland-tartan surfaces under Highland-tartan-and-Black-Watch-kilt-and-clan-Macleod Highland-clan-and-Edinburgh-tartan-mill tartan-and-pleated-light. Sits at the modifier-and-textile end of the grid, parallel to sash and tabard in usage.

Ultramarine
noun

The pigment ground from lapis lazuli — the Afghan mineral imported through Venice in the late Middle Ages, more expensive by weight than gold during the Renaissance. The color refers to a freshly mixed ultramarine pigment in linseed oil: a saturated, slightly violet-shifted deep blue with the matte finish of micron-ground rock. Deeper than cobalt, cooler than royal, with the art-historical weight of the blue Vermeer reserved for Mary's robe.

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.

#1b43ac
Original
#0053af
Protanopia
#0046aa
Deuteranopia
#005e71
Tritanopia
#424242
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
8.59:1
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
2.45:1

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
##1B43AC
Display P3
Display P3
color(display-p3 0.1472 0.2592 0.6499)
P3 has subtle headroomOKLCH chroma 0.174

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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