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Bold Vladivostok

#316ad1
Notes

Bold Vladivostok (#316AD1) is a true azure 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 (219°, 63%, 51%) 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
#316ad1
RGB
rgb(49, 106, 209)
HSL
hsl(219, 63%, 51%)
HWB
hwb(219 19% 18%)
OKLCH
oklch(54.4% 0.170 261.1)
HSV
hsv(219, 77%, 82%)
LAB
lab(46.40% 17.79 -58.52)
LCH
lch(46.40% 61.16 286.91)
CMYK
cmyk(77%, 49%, 0%, 18%)

Etymology

Bold
adjective

Old English beald, brave, courageous — a quality word that crossed over to color in the late seventeenth century. Bold describes a color that asserts itself: high saturation combined with mid lightness, where the hue presents itself without compromise. Sits at the center of the bold-bucket grid, near strong and rich. Closer to a presence word than a pigment word.

Vladivostok
noun

The Russian Pacific Far East port city — and the saturated deep blue of Amursky Bay and Vladivostok Harbor on the Sea of Japan. Vladivostok refers to the harbor water at midday: a saturated, slightly cool deep blue with the optical depth of cold-water Pacific port.

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.

#316ad1
Original
#2d76d5
Protanopia
#0067cf
Deuteranopia
#008393
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
5.11:1
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
4.11:1

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