What color is #173DA4?

#173DA4 is a dark, vivid blue. In RGB it is rgb(23, 61, 164), and in HSL hsl(224, 75%, 37%).

Is #173DA4 accessible as text?

On white, #173DA4 has a contrast ratio of 9.38:1 (passes WCAG AA for body text); on black it is 2.24:1 (fails). For text placed on #173DA4, use white for the best readability.

What is the closest Tailwind color to #173DA4?

The nearest Tailwind CSS token is blue-800 (#193CB8).

What colors go well with #173DA4?

#173DA4 pairs cleanly with neutrals — cream, taupe, charcoal and cool grays — and with its complementary #A57F18. In UI, a softer accent is often easier to use than the exact complement. Explore the harmonies, shades, tints and ready-made palettes for #173DA4 below.

Is #173DA4 good for buttons?

#173DA4 works well for buttons and highlights, but use white text on #173DA4 — black text only reaches 2.24:1, below the 4.5:1 needed for normal-size labels.

Is #173DA4 the same as CSS darkslateblue?

No — #173DA4 is not the CSS named color darkslateblue, but darkslateblue (#483D8B) is the closest CSS named color.

#173DA4 Color — HEX, RGB, HSL, Palette & Shades

Palettes built on #173DA4

Not just a swatch — here's how #173DA4 works with other colors. Named schemes with #173DA4 in its natural role, and a note on why the supporting colors balance it.

Coastal Morning Lead · 5 colors

Lead #173DA4 Accent #A5C4C2 Surface #DDDBBF Secondary #9AA0A1 Anchor #21344A

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

Tech Product Signal · 5 colors

Signal #173DA4 Surface #14161A Highlight #F4F6F8 Secondary #5A6672 Accent #3C64C3

Egyptian Blue is the vivid signal in this product UI — on a near-black surface with cool white, a slate grey and a lighter tint of Egyptian Blue.

Vintage Leather Lead · 5 colors

Lead #173DA4 Secondary #7F4536 Surface #EED7C2 Accent #365246 Anchor #57223A

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

Berry & Cream Lead · 5 colors

Lead #173DA4 Surface #F6E5D8 Anchor #5B2144 Accent #E5C2CA Secondary #322B2F

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

Minimal Editorial Surface · 5 colors

Surface #F8F4EF Accent #173DA4 Secondary #5F7094 Support #9D8F88 Ink #18140F

Egyptian Blue 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 Egyptian Blue carrying the quiet middle.

Build a working theme in the generator →

Color Lab

How #173DA4 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 9/100

Cool

Reads cool and recessive — calming, technical, good for trust-led UI.

Softness 29/100

Low

Firm and assertive — carries weight and contrast.

Depth 62/100

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 28/100

Low

A faint retro warmth without tipping into sepia.

Luxury 61/100

High

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

Brand distinctiveness 46/100

Moderate

Recognisable but shares space with nearby hues.

UI accent fit 74/100

High

Strong interactive accent — visible and can carry a legible label.

Surface fit 14/100

Very low

Too saturated or mid-toned for big areas — keep it to accents.

Print safety 68/100

High

Prints close, with a slight loss of vibrancy.

Pairs with #173DA4

For UI

For branding

For interior

For fashion

People also use #173DA4 with

Carolina Blue Indigo Dark Goldenrod Gainsboro Charcoal

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 9.4:1. Use

Subtle surface Use #CED7F0 for cards and hover fills. Tint 80

Avoid beside #2118A5 — 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 #173DA4 at work across the surfaces designers actually ship.

Website / UI

Northwind Sign up

Build faster.

A working theme, generated in seconds.

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: #173DA4;
  --color-base-rgb: 23 61 164;
  --color-base-oklch: oklch(40.6% 0.172 264.3);
  --color-50: #F1F4FE;
  --color-100: #DAE3FB;
  --color-200: #B8C8F5;
  --color-300: #87A1E8;
  --color-400: #5B7CD7;
  --color-500: #385CBC;
  --color-600: #324B90;
  --color-700: #293966;
  --color-800: #1E2842;
  --color-900: #141A29;
  --color-on-base: #FFFFFF;
}

// tailwind.config.js
colors: {
  egyptian-blue: {
    50: '#F1F4FE',
    100: '#DAE3FB',
    200: '#B8C8F5',
    300: '#87A1E8',
    400: '#5B7CD7',
    500: '#385CBC',
    600: '#324B90',
    700: '#293966',
    800: '#1E2842',
    900: '#141A29',
  },
}

$base: #173DA4;
$base-ink: #FFFFFF;
$base-50: #F1F4FE;
$base-100: #DAE3FB;
$base-200: #B8C8F5;
$base-300: #87A1E8;
$base-400: #5B7CD7;
$base-500: #385CBC;
$base-600: #324B90;
$base-700: #293966;
$base-800: #1E2842;
$base-900: #141A29;
$base-hover: #133184;
$base-subtle: #B3C2EA;

{
    "color": {
        "base": {
            "value": "#173DA4",
            "type": "color"
        },
        "onBase": {
            "value": "#FFFFFF",
            "type": "color"
        },
        "scale": {
            "50": {
                "value": "#F1F4FE",
                "type": "color"
            },
            "100": {
                "value": "#DAE3FB",
                "type": "color"
            },
            "200": {
                "value": "#B8C8F5",
                "type": "color"
            },
            "300": {
                "value": "#87A1E8",
                "type": "color"
            },
            "400": {
                "value": "#5B7CD7",
                "type": "color"
            },
            "500": {
                "value": "#385CBC",
                "type": "color"
            },
            "600": {
                "value": "#324B90",
                "type": "color"
            },
            "700": {
                "value": "#293966",
                "type": "color"
            },
            "800": {
                "value": "#1E2842",
                "type": "color"
            },
            "900": {
                "value": "#141A29",
                "type": "color"
            }
        }
    }
}

Palettes built on #173DA4

Color Lab

Pairs with #173DA4

UI roles & guardrails

In real applications

Scales

Every model

Export