What color is #170321?

#170321 is a very dark, vivid purple. In RGB it is rgb(23, 3, 33), and in HSL hsl(280, 83%, 7%).

Is #170321 accessible as text?

On white, #170321 has a contrast ratio of 19.60:1 (passes WCAG AA for body text); on black it is 1.07:1 (fails). For text placed on #170321, use white for the best readability.

What is the closest Tailwind color to #170321?

The nearest Tailwind CSS token is mauve-950 (#0C090C).

What colors go well with #170321?

#170321 pairs cleanly with neutrals — cream, taupe, charcoal and cool grays — and with its complementary #0D2103. In UI, a softer accent is often easier to use than the exact complement. Explore the harmonies, shades, tints and ready-made palettes for #170321 below.

Is #170321 good for buttons?

#170321 works well for buttons and highlights, but use white text on #170321 — black text only reaches 1.07:1, below the 4.5:1 needed for normal-size labels.

Is #170321 the same as CSS midnightblue?

No — #170321 is not the CSS named color midnightblue, but midnightblue (#191970) is the closest CSS named color by perceptual color distance — it sits in a different color family, so treat it as a rough reference, not a match.

#170321 Color — HEX, RGB, HSL, Palette & Shades

Palettes built on #170321

Not just a swatch — here's how #170321 works with other colors. Named schemes with #170321 in its natural role, and a note on why the supporting colors balance it.

Vintage Leather Lead · 5 colors

Lead #170321 Secondary #7E4630 Surface #ECD8C1 Accent #355249 Anchor #592235

Jet Black plays the worn-leather lead, deepened by saddle brown and an oxblood anchor, softened by aged cream and cooled by a muted forest green.

Japanese Sand Base · 5 colors

Base #170321 Surface #F1E8DC Highlight #F8F0E7 Secondary #BDADA1 Ink #2C2723

Jet Black sets a calm, sun-bleached base here, wrapped in bone and paper off-whites and a soft greige, with a single ink accent for wabi-sabi restraint.

Luxury Packaging Feature · 5 colors

Feature #170321 Anchor #141210 Accent #D89954 Secondary #2C2630 Surface #F3EDE3

Jet Black carries the depth in this luxury scheme, offset by a brass accent and near-black and held together by a deep neutral and an off-white surface.

Minimal Editorial Surface · 5 colors

Surface #F8F4EF Accent #170321 Secondary #322B37 Support #9C9088 Ink #18140F

Jet Black is the single accent in this high-contrast editorial system — set on near-white paper against near-black ink, with a warm grey and a desaturated tint of Jet Black carrying the quiet middle.

Berry & Cream Lead · 5 colors

Lead #170321 Surface #F5E6D7 Anchor #5C213F Accent #E5C2C6 Secondary #332B2F

Jet Black sits between cream and a deep berry here, softened by a blush accent and grounded by charcoal.

Build a working theme in the generator →

Color Lab

How #170321 actually behaves in design work — read from its OKLCH lightness, chroma and hue, not just its raw numbers. Ten signals to help you decide where this color earns its place.

Warmth 48/100

Neutral

Balanced temperature — flexible, sits between warm and cool schemes.

Softness 17/100

Very low

Firm and assertive — carries weight and contrast.

Depth 81/100

Very high

Deep and grounding — anchors a layout, strong dark-mode base.

Naturalness 0/100

Very low

Reads engineered rather than organic — synthetic, digital.

Vintage feel 28/100

Low

A faint retro warmth without tipping into sepia.

Luxury 82/100

Very high

Restrained and premium — deep, quiet, high-end packaging and fashion.

Brand distinctiveness 25/100

Low

Quiet and neutral — a supporting tone, not a signature.

UI accent fit 8/100

Very low

Weak as an action color — too pale, too dark or too muted to signal.

Surface fit 54/100

Moderate

Usable as a tinted surface in measured doses.

Print safety 92/100

Very high

Reproduces faithfully in CMYK — safe for packaging and print.

Pairs with #170321

For UI

For branding

For interior

For fashion

People also use #170321 with

Navy Jet Black Graphite Gainsboro Eggplant

UI roles & guardrails

Primary action Safe as a filled button with white label. AAA

Body text Passes on white at 16px and above. Pass

Large display Fine for headings 24px+ on white. Pass

Background Pair with white text at 19.6:1. Use

Subtle surface Use #D9B3EC for cards and hover fills. Tint 80

Avoid beside #210321 — the hue gap is too small to read as intentional. Clash

In real applications

Not a swatch to memorise — a color to build with. Here is #170321 at work across the surfaces designers actually ship.

Website / UI

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Dashboard

Revenue

$48.2k ▲ 12%

Brand

AVELINE

Studio

Poster

Nov 14 · 8PM

NIGHT
MARKET

Packaging

BLOOM

Botanical Wash

250 ml

Interior

Every model

Export

:root {
  --color-base: #170321;
  --color-base-rgb: 23 3 33;
  --color-base-oklch: oklch(16.1% 0.066 313.0);
  --color-50: #FAF0FE;
  --color-100: #F1D9FD;
  --color-200: #E1B4F8;
  --color-300: #C982ED;
  --color-400: #B054DE;
  --color-500: #9331C3;
  --color-600: #722D95;
  --color-700: #532669;
  --color-800: #371C44;
  --color-900: #22132A;
  --color-on-base: #FFFFFF;
}

// tailwind.config.js
colors: {
  jet-black: {
    50: '#FAF0FE',
    100: '#F1D9FD',
    200: '#E1B4F8',
    300: '#C982ED',
    400: '#B054DE',
    500: '#9331C3',
    600: '#722D95',
    700: '#532669',
    800: '#371C44',
    900: '#22132A',
  },
}

$base: #170321;
$base-ink: #FFFFFF;
$base-50: #FAF0FE;
$base-100: #F1D9FD;
$base-200: #E1B4F8;
$base-300: #C982ED;
$base-400: #B054DE;
$base-500: #9331C3;
$base-600: #722D95;
$base-700: #532669;
$base-800: #371C44;
$base-900: #22132A;
$base-hover: #12021A;
$base-subtle: #C78BE5;

{
    "color": {
        "base": {
            "value": "#170321",
            "type": "color"
        },
        "onBase": {
            "value": "#FFFFFF",
            "type": "color"
        },
        "scale": {
            "50": {
                "value": "#FAF0FE",
                "type": "color"
            },
            "100": {
                "value": "#F1D9FD",
                "type": "color"
            },
            "200": {
                "value": "#E1B4F8",
                "type": "color"
            },
            "300": {
                "value": "#C982ED",
                "type": "color"
            },
            "400": {
                "value": "#B054DE",
                "type": "color"
            },
            "500": {
                "value": "#9331C3",
                "type": "color"
            },
            "600": {
                "value": "#722D95",
                "type": "color"
            },
            "700": {
                "value": "#532669",
                "type": "color"
            },
            "800": {
                "value": "#371C44",
                "type": "color"
            },
            "900": {
                "value": "#22132A",
                "type": "color"
            }
        }
    }
}

Palettes built on #170321

Color Lab

Pairs with #170321

UI roles & guardrails

In real applications

Scales

Every model

Export