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Bold Hepatica

#3367d4
Notes

Bold Hepatica (#3367D4) 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 (221°, 65%, 52%) 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
#3367d4
RGB
rgb(51, 103, 212)
HSL
hsl(221, 65%, 52%)
HWB
hwb(221 20% 17%)
OKLCH
oklch(54.0% 0.177 262.8)
P3
color(display-p3 0.2511 0.3991 0.8035)
HSV
hsv(221, 76%, 83%)
LAB
lab(45.85% 21.05 -61.12)
LCH
lch(45.85% 64.64 289.01)
CMYK
cmyk(76%, 51%, 0%, 17%)

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.

Hepatica
noun

The genus Hepaticaliverwort flower, European-and-North-American spring-blooming perennials with saturated deep-blue flowers among the earliest to bloom in temperate forests. The color refers to a fresh H. nobilis in March: a saturated, slightly cool deep blue with the satin finish of six-tepaled spring flower.

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.

#3367d4
Original
#1e74d8
Protanopia
#0066d2
Deuteranopia
#008194
Tritanopia
#646464
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
5.21:1
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
4.03:1

Wide gamut

Display P3 representation

The CSS Color 4 wide-gamut form of this color. Both swatches render the same color on every display — the P3 form only diverges from sRGB when a designer pushes channels outside sRGB's reach.

sRGB hex
sRGB hex
##3367D4
Display P3
Display P3
color(display-p3 0.2511 0.3991 0.8035)
P3 has subtle headroomOKLCH chroma 0.177

Moderately saturated colors gain a small bump in P3 — the difference is usually visible side-by-side on wide-gamut hardware but won't change the character of the color.

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