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Tough Glazed Royal

#3966da
Notes

Tough Glazed Royal (#3966DA) 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 (223°, 69%, 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
#3966da
RGB
rgb(57, 102, 218)
HSL
hsl(223, 69%, 54%)
HWB
hwb(223 22% 15%)
OKLCH
oklch(54.5% 0.185 264.9)
HSV
hsv(223, 74%, 85%)
LAB
lab(46.22% 24.62 -63.92)
LCH
lch(46.22% 68.49 291.06)
CMYK
cmyk(74%, 53%, 0%, 15%)

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.

Glazed
modifier

Old English glæs, glass. As a color modifier, glazed implies a fired-pottery-glaze-and-glass-coating quality, the visual register of Stoke-on-Trent-and-Italian-Maiolica-glazed hand-applied-and-fired ceramic-and-pottery-and-tile-glaze Stoke-on-Trent-and-Italian-Maiolica glazed-pottery surfaces under Stoke-on-Trent-and-Italian-Maiolica hand-glazed pottery-and-tile workshop-light. Sits at the modifier-and-texture end of the grid, parallel to gloss and enameled in usage.

Royal
noun

The blue of European royal court dress and regalia from the late seventeenth century forward — the color of British peers' robes, French royal sashes, the lining of the crown-jewel cases. The color refers to a saturated, slightly violet-shifted blue with the matte finish of velvet or melton wool dyed to maximum intensity: deeper than cornflower, warmer than ultramarine, with the heraldic weight of a color reserved for monarchs and the official Crown.

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.

#3966da
Original
#0875de
Protanopia
#0066d8
Deuteranopia
#008296
Tritanopia
#656565
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
5.14:1
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
4.09:1

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