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Tough Tobi

#b42935
Notes

Tough Tobi (#B42935) 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 (355°, 63%, 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 cyan. For something softer, pull in its analogous neighbors on either side of the wheel.

HEX
#b42935
RGB
rgb(180, 41, 53)
HSL
hsl(355, 63%, 43%)
HWB
hwb(355 16% 29%)
OKLCH
oklch(50.8% 0.174 21.8)
HSV
hsv(355, 77%, 71%)
LAB
lab(40.49% 55.18 28.10)
LCH
lch(40.49% 61.93 26.98)
CMYK
cmyk(0%, 77%, 71%, 29%)

Etymology

Tough
adjective

Old English tōh, firm / tenacious — sharing root with German zäh. As a color modifier, tough implies a saturated-and-resilient quality where the hue resists fading-and-modulation through its strong pigmentation. Sits at the bold-and-resilient end of the grid, parallel to rugged and hardy in usage.

Tobi
noun

Named for the tobi — the black kite (Milvus migrans) — the slightly muted red-brown of the bird's plumage and of the tobi-iro dye traditionally used in working-class Edo dress. The color refers to a freshly-dyed tobi-iro cotton: a soft, slightly muted red-brown with the matte finish of plant-and-iron mordant. Drier than rust, warmer than maroon.

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.

#b42935
Original
#534c34
Protanopia
#756a30
Deuteranopia
#c6002f
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
6.35:1
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
3.31:1

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