What color is #175AAB?

#175AAB is a dark, vivid blue. In RGB it is rgb(23, 90, 171), and in HSL hsl(213, 76%, 38%).

Is #175AAB accessible as text?

On white, #175AAB has a contrast ratio of 6.80:1 (passes WCAG AA for body text); on black it is 3.09:1 (fails). For text placed on #175AAB, use white for the best readability.

What is the closest Tailwind color to #175AAB?

The nearest Tailwind CSS token is sky-700 (#0069A8).

What colors go well with #175AAB?

#175AAB pairs cleanly with neutrals — cream, taupe, charcoal and cool grays — and with its complementary #AB6817. In UI, a softer accent is often easier to use than the exact complement. Explore the harmonies, shades, tints and ready-made palettes for #175AAB below.

Is #175AAB good for buttons?

#175AAB works well for buttons and highlights, but use white text on #175AAB — black text only reaches 3.09:1, below the 4.5:1 needed for normal-size labels.

Is #175AAB the same as CSS darkslateblue?

No — #175AAB is not the CSS named color darkslateblue, but darkslateblue (#483D8B) is the closest CSS named color.

#175AAB Color — HEX, RGB, HSL, Palette & Shades

Palettes built on #175AAB

Not just a swatch — here's how #175AAB works with other colors. Named schemes with #175AAB in its natural role, and a note on why the supporting colors balance it.

Coastal Morning Lead · 5 colors

Lead #175AAB Accent #A5C4C1 Surface #DDDBBF Secondary #9AA0A1 Anchor #20344A

Denim 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 #175AAB Surface #14161A Highlight #F4F6F8 Secondary #5A6672 Accent #467FCB

Denim 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 Denim Blue.

Vintage Leather Lead · 5 colors

Lead #175AAB Secondary #7F4537 Surface #E1DDC1 Accent #375246 Anchor #57233B

Denim 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 #175AAB Surface #EDE9D6 Anchor #5A2145 Accent #E4C2CA Secondary #322B2F

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

Minimal Editorial Surface · 5 colors

Surface #F6F4EF Accent #175AAB Secondary #7186A3 Support #9D8F89 Ink #16140F

Denim 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 Denim Blue carrying the quiet middle.

Build a working theme in the generator →

Color Lab

How #175AAB 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 11/100

Cool

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

Softness 36/100

Low

Middle-weight — neither delicate nor heavy.

Depth 54/100

Moderate

Mid depth — usable as an accent or a muted ground.

Naturalness 0/100

Very low

Reads engineered rather than organic — synthetic, digital.

Vintage feel 38/100

Low

A faint retro warmth without tipping into sepia.

Luxury 57/100

Moderate

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

Brand distinctiveness 39/100

Low

Recognisable but shares space with nearby hues.

UI accent fit 95/100

Very high

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

Surface fit 10/100

Very low

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

Print safety 70/100

High

Reproduces faithfully in CMYK — safe for packaging and print.

Pairs with #175AAB

For UI

For branding

For interior

For fashion

People also use #175AAB with

Robin Egg Blue Zaffre Ginger Gainsboro Charcoal

UI roles & guardrails

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

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 6.8:1. Use

Subtle surface Use #CEDEF1 for cards and hover fills. Tint 80

Avoid beside #1728AB — 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 #175AAB 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: #175AAB;
  --color-base-rgb: 23 90 171;
  --color-base-oklch: oklch(47.4% 0.145 256.2);
  --color-50: #F1F7FE;
  --color-100: #DAE9FB;
  --color-200: #B7D3F5;
  --color-300: #87B3E9;
  --color-400: #5A93D8;
  --color-500: #3774BD;
  --color-600: #325C90;
  --color-700: #294466;
  --color-800: #1E2F43;
  --color-900: #141E29;
  --color-on-base: #FFFFFF;
}

// tailwind.config.js
colors: {
  denim-blue: {
    50: '#F1F7FE',
    100: '#DAE9FB',
    200: '#B7D3F5',
    300: '#87B3E9',
    400: '#5A93D8',
    500: '#3774BD',
    600: '#325C90',
    700: '#294466',
    800: '#1E2F43',
    900: '#141E29',
  },
}

$base: #175AAB;
$base-ink: #FFFFFF;
$base-50: #F1F7FE;
$base-100: #DAE9FB;
$base-200: #B7D3F5;
$base-300: #87B3E9;
$base-400: #5A93D8;
$base-500: #3774BD;
$base-600: #325C90;
$base-700: #294466;
$base-800: #1E2F43;
$base-900: #141E29;
$base-hover: #134888;
$base-subtle: #B4CDEB;

{
    "color": {
        "base": {
            "value": "#175AAB",
            "type": "color"
        },
        "onBase": {
            "value": "#FFFFFF",
            "type": "color"
        },
        "scale": {
            "50": {
                "value": "#F1F7FE",
                "type": "color"
            },
            "100": {
                "value": "#DAE9FB",
                "type": "color"
            },
            "200": {
                "value": "#B7D3F5",
                "type": "color"
            },
            "300": {
                "value": "#87B3E9",
                "type": "color"
            },
            "400": {
                "value": "#5A93D8",
                "type": "color"
            },
            "500": {
                "value": "#3774BD",
                "type": "color"
            },
            "600": {
                "value": "#325C90",
                "type": "color"
            },
            "700": {
                "value": "#294466",
                "type": "color"
            },
            "800": {
                "value": "#1E2F43",
                "type": "color"
            },
            "900": {
                "value": "#141E29",
                "type": "color"
            }
        }
    }
}