What color is #171729?

#171729 is a very dark low-chroma blue-gray with a subtle blue cast. In RGB it is rgb(23, 23, 41), and in HSL hsl(240, 28%, 13%).

Is #171729 accessible as text?

On white, #171729 has a contrast ratio of 17.63:1 (passes WCAG AA for body text); on black it is 1.19:1 (fails). For text placed on #171729, use white for the best readability.

What is the closest Tailwind color to #171729?

The nearest Tailwind CSS token is gray-900 (#101828).

What colors go well with #171729?

As a neutral, #171729 pairs cleanly with white, off-white and light grays for text, and sits under accent hues like blue, violet, emerald or warm orange — use it as a dark surface or high-contrast base and let the accent carry the color.

Is #171729 the same as CSS midnightblue?

No — #171729 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.

#171729 Color — HEX, RGB, HSL, Palette & Shades

Palettes built on #171729

Not just a swatch — here's how #171729 works with other colors. Named schemes with #171729 in its natural role, and a note on why the supporting colors balance it.

Coastal Morning Lead · 5 colors

Lead #171729 Accent #A5C4C3 Surface #EAD5BF Secondary #9AA0A1 Anchor #22334A

Graphite opens this coastal palette with sea-glass and warm sand alongside it, grounded by driftwood grey and a deep-navy anchor.

Nordic Calm Accent · 5 colors

Accent #171729 Secondary #AEB4B8 Surface #F1F2F0 Support #7E92A7 Anchor #2E3236

Graphite keeps this Nordic scheme quiet — cool greys and a soft white around it, a muted-blue support and a charcoal anchor.

Vintage Leather Lead · 5 colors

Lead #171729 Secondary #7F4534 Surface #EDD7C2 Accent #365247 Anchor #582238

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

Luxury Packaging Feature · 5 colors

Feature #171729 Anchor #141210 Accent #DB9758 Secondary #272833 Surface #F3ECE3

Graphite 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 #171729 Secondary #3A3B42 Support #9D9088 Ink #18140F

Graphite 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 Graphite carrying the quiet middle.

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Color Lab

How #171729 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 44/100

Neutral

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

Softness 23/100

Low

Firm and assertive — carries weight and contrast.

Depth 74/100

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 24/100

Low

Clean and current — no dusty, aged cast.

Luxury 75/100

High

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

Brand distinctiveness 14/100

Very low

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

UI accent fit 11/100

Very low

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

Surface fit 60/100

High

Calm enough for large fills — backgrounds, cards, sections.

Print safety 95/100

Very high

Reproduces faithfully in CMYK — safe for packaging and print.

Pairs with #171729

For UI

For branding

For interior

For fashion

People also use #171729 with

Gunmetal Gray Graphite Bistre Gainsboro Prussian Blue

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 17.6:1. Use

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

Avoid beside #1E182A — 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 #171729 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: #171729;
  --color-base-rgb: 23 23 41;
  --color-base-oklch: oklch(21.4% 0.035 283.0);
  --color-50: #F5F5FA;
  --color-100: #E5E5F1;
  --color-200: #CBCBE2;
  --color-300: #A6A6CA;
  --color-400: #8282B0;
  --color-500: #626293;
  --color-600: #4F4F72;
  --color-700: #3C3C53;
  --color-800: #2A2A37;
  --color-900: #1B1B22;
  --color-on-base: #FFFFFF;
}

// tailwind.config.js
colors: {
  graphite: {
    50: '#F5F5FA',
    100: '#E5E5F1',
    200: '#CBCBE2',
    300: '#A6A6CA',
    400: '#8282B0',
    500: '#626293',
    600: '#4F4F72',
    700: '#3C3C53',
    800: '#2A2A37',
    900: '#1B1B22',
  },
}

$base: #171729;
$base-ink: #FFFFFF;
$base-50: #F5F5FA;
$base-100: #E5E5F1;
$base-200: #CBCBE2;
$base-300: #A6A6CA;
$base-400: #8282B0;
$base-500: #626293;
$base-600: #4F4F72;
$base-700: #3C3C53;
$base-800: #2A2A37;
$base-900: #1B1B22;
$base-hover: #131322;
$base-subtle: #AEAECB;

{
    "color": {
        "base": {
            "value": "#171729",
            "type": "color"
        },
        "onBase": {
            "value": "#FFFFFF",
            "type": "color"
        },
        "scale": {
            "50": {
                "value": "#F5F5FA",
                "type": "color"
            },
            "100": {
                "value": "#E5E5F1",
                "type": "color"
            },
            "200": {
                "value": "#CBCBE2",
                "type": "color"
            },
            "300": {
                "value": "#A6A6CA",
                "type": "color"
            },
            "400": {
                "value": "#8282B0",
                "type": "color"
            },
            "500": {
                "value": "#626293",
                "type": "color"
            },
            "600": {
                "value": "#4F4F72",
                "type": "color"
            },
            "700": {
                "value": "#3C3C53",
                "type": "color"
            },
            "800": {
                "value": "#2A2A37",
                "type": "color"
            },
            "900": {
                "value": "#1B1B22",
                "type": "color"
            }
        }
    }
}

Palettes built on #171729

Color Lab

Pairs with #171729

UI roles & guardrails

In real applications

Scales

Every model

Export