#312E81 color
The swatch above shows #312E81 with its hex code written on it in white and in black, so you can see which of the two is legible before reading the measured ratios below.
#312E81 is a dark, moderately saturated blue, closest to the CSS named color darkslateblue (#483D8B).
It is also a Tailwind CSS default: indigo-900. That means you can write bg-indigo-900 or text-indigo-900 directly, with no arbitrary-value brackets and no entry in your theme config.
Color values
| HEX | #312E81 |
| RGB | rgb(49, 46, 129) |
| HSL | hsl(242, 47%, 34%) |
| CMYK | cmyk(62%, 64%, 0%, 49%) |
| Decimal | 3223169 |
| CSS | color: #312E81; |
| Android | 0xFF312E81 |
| Swift | UIColor(red: 0.192, green: 0.180, blue: 0.506, alpha: 1) |
Accessibility and contrast
| White text on #312E81 | 11.42:1 — AA pass · AA large pass · AAA pass |
| Black text on #312E81 | 1.84:1 — AA fail · AA large fail · AAA fail |
| Recommended text color | white |
WCAG 2.1 asks for at least 4.5:1 for body text and 3:1 for large text (18 pt, or 14 pt bold).
Tints and shades of #312E81
Each swatch keeps the hue and saturation of #312E81 and varies only lightness — the quickest way to build a usable scale from a single brand color.
Colors that go with #312E81
Harmonies generated by rotating the hue on the color wheel while holding saturation and lightness constant.
Using #312E81 in code
/* CSS */
.element { color: #312E81; background-color: #312E81; }
.element { color: rgb(49 46 129); }
.element { color: hsl(242 47% 34%); }
/* Tailwind */
<div class="bg-indigo-900 text-white">
/* SCSS variable */
$brand: #312E81;Frequently asked questions
What color is #312E81?
#312E81 is a dark, moderately saturated blue. Its hue sits at 242° on the color wheel, with 47% saturation and 34% lightness.
What is #312E81 in RGB?
#312E81 converts to rgb(49, 46, 129) — 49 red, 46 green and 129 blue.
What is #312E81 in CMYK?
Approximately cmyk(62%, 64%, 0%, 49%). Print output depends on the ICC profile of the press and paper, so treat this as a starting point rather than an exact match.
Should text on #312E81 be white or black?
White gives the better contrast ratio (11.42:1 versus 1.84:1).
What is the complementary color of #312E81?
#7D7F2E — the hue directly opposite #312E81 on the color wheel.