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Tough Gin

#3578dd
Notes

Tough Gin (#3578DD) is a true azure with a vibrant character. It holds its own as a focal accent, carrying visual weight without tipping into neon territory. Its HSL profile (216°, 71%, 54%) 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
#3578dd
RGB
rgb(53, 120, 221)
HSL
hsl(216, 71%, 54%)
HWB
hwb(216 21% 13%)
OKLCH
oklch(58.3% 0.169 258.7)
HSV
hsv(216, 76%, 87%)
LAB
lab(51.16% 13.89 -57.65)
LCH
lch(51.16% 59.30 283.54)
CMYK
cmyk(76%, 46%, 0%, 13%)

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.

Gin
noun

The juniper-flavored distilled spirit — and the saturated deep blue of Bombay Sapphire-bottle glass and Hendrick's-style apothecary-style packaging. Gin color refers to a fresh-poured gin bottle in a bar light: a saturated, slightly cool deep blue with the high gloss of dyed glass.

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.

#3578dd
Original
#4282e1
Protanopia
#1973db
Deuteranopia
#0090a0
Tritanopia
#717171
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).
AA Largeon White
4.30:1
The quick brown foxSample body text at normal size. The wcag minimum for body contrast is 4.5:1 (AA) or 7:1 (AAA).
AAon Black
4.88:1

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