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Shielded Loft Indigo

#5f64cb
Notes

Shielded Loft Indigo (#5F64CB) is a true blue 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 (237°, 51%, 58%) 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 yellow. For something softer, pull in its analogous neighbors on either side of the wheel.

HEX
#5f64cb
RGB
rgb(95, 100, 203)
HSL
hsl(237, 51%, 58%)
HWB
hwb(237 37% 20%)
OKLCH
oklch(55.2% 0.157 277.9)
HSV
hsv(237, 53%, 80%)
LAB
lab(46.79% 27.02 -54.33)
LCH
lch(46.79% 60.68 296.44)
CMYK
cmyk(53%, 51%, 0%, 20%)

Etymology

Shielded
adjective

Old English scild, shield — past-participle of shield, sharing root with German Schild. As a color modifier, shielded implies a saturated-and-protected-and-defensive quality, the deep-rich color of medieval-knight armorial-shield-and-coat-of-arms heraldic display. Sits at the bold-and-fortified end of the grid, parallel to armored and bastioned.

Loft
modifier

Old Norse lopt, upper-floor / sky. As a color modifier, loft implies an upper-floor-and-rafter quality, the visual register of Tribeca-and-SoHo-Loft Industrial-Revolution converted-warehouse exposed-rafter-and-cast-iron-pillar artist-studio surfaces under Mid-Century-Modern New-York-City artist-loft light. Sits at the modifier-and-place end of the grid, parallel to atrium and barn in usage.

Indigo
noun

Indigofera tinctoria, the South Asian legume whose leaves yield the deep blue dye that has clothed humanity for at least four thousand years — Egyptian linen, Mayan textile, the slave-grown plantations of Carolina. The color refers to a freshly indigo-dyed cotton thread: a saturated, slightly violet-shifted deep blue with the slight lustre of a fiber surface oxidized in air. Deeper than cobalt, cooler than royal.

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.

#5f64cb
Original
#3073cf
Protanopia
#216bc9
Deuteranopia
#2e7b8e
Tritanopia
#6a6a6a
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
5.03:1
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
4.17:1

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