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Firm Plumed Royal

#4b6ad9
Notes

Firm Plumed Royal (#4B6AD9) is a true blue with a vibrant character. It holds its own as a focal accent, carrying visual weight without tipping into neon territory. Its HSL profile (227°, 65%, 57%) 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
#4b6ad9
RGB
rgb(75, 106, 217)
HSL
hsl(227, 65%, 57%)
HWB
hwb(227 29% 15%)
OKLCH
oklch(56.1% 0.173 268.5)
HSV
hsv(227, 65%, 85%)
LAB
lab(48.02% 24.27 -60.40)
LCH
lch(48.02% 65.09 291.89)
CMYK
cmyk(65%, 51%, 0%, 15%)

Etymology

Firm
adjective

Latin firmus, strong / stable — sharing root with English farm (originally a fixed-yearly-rental). As a color modifier, firm implies a saturated-and-resolute quality where the hue holds its visual position without wavering. Sits at the bold-and-firm end of the grid, parallel to steadfast and unwavering in usage.

Plumed
modifier

Latin plūma, feather. As a color modifier, plumed implies a feathered-and-decorative-feather quality, the visual register of Edwardian-and-Belle-Époque-plumed-hat hand-set-and-decorative ostrich-and-egret-feather Edwardian-and-Belle-Époque plumed-and-feathered-hat surfaces under Edwardian-and-Belle-Époque plumed-hat-and-feather millinery-light. Sits at the modifier-and-texture end of the grid, parallel to fluff and down 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.

#4b6ad9
Original
#2779dd
Protanopia
#006cd7
Deuteranopia
#008497
Tritanopia
#6b6b6b
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
4.81:1
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
4.36:1

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