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Fortified Chì

#b42745
Notes

Fortified Chì (#B42745) is a true red with a warm character. It leans warm, pulling light toward red, orange, and yellow. Naturally inviting, it suits editorial and hospitality contexts. Its HSL profile (347°, 64%, 43%) 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 teal. For something softer, pull in its analogous neighbors on either side of the wheel.

HEX
#b42745
RGB
rgb(180, 39, 69)
HSL
hsl(347, 64%, 43%)
HWB
hwb(347 15% 29%)
OKLCH
oklch(51.0% 0.176 14.7)
HSV
hsv(347, 78%, 71%)
LAB
lab(40.55% 56.70 18.23)
LCH
lch(40.55% 59.56 17.83)
CMYK
cmyk(0%, 78%, 62%, 29%)

Etymology

Fortified
adjective

Latin fortificāre, to make strong — past-participle of fortify. As a color modifier, fortified implies a saturated-and-strengthened-and-defensive quality, the deep-rich color of Vauban-style military-fortification stone-and-earth rampart-and-bastion architecture. Sits at the bold-and-fortified end of the grid, parallel to bastioned and armored.

Chì
noun

One of the five primary Chinese cardinal colors (chì — red — corresponding to the south, summer, and the phoenix). Distinct from hong, which is more general; chì implies the deeper, slightly more saturated red of historical imperial regalia. The color refers to chì-pigment in classical Chinese painting: a saturated, slightly cool deep red with the matte finish of mineral-and-binder pigment.

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

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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.

#b42745
Original
#4f4d45
Protanopia
#736a41
Deuteranopia
#c50034
Tritanopia
#474747
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).
AAon White
6.33:1
The quick brown foxSample body text at normal size. The wcag minimum for body contrast is 4.5:1 (AA) or 7:1 (AAA).
AA Largeon Black
3.32:1

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