What color is #170C8D?

#170C8D is a dark, vivid blue. In RGB it is rgb(23, 12, 141), and in HSL hsl(245, 84%, 30%).

Is #170C8D accessible as text?

On white, #170C8D has a contrast ratio of 14.25:1 (passes WCAG AA for body text); on black it is 1.47:1 (fails). For text placed on #170C8D, use white for the best readability.

What is the closest Tailwind color to #170C8D?

The nearest Tailwind CSS token is indigo-900 (#312C85).

What colors go well with #170C8D?

#170C8D pairs cleanly with neutrals — cream, taupe, charcoal and cool grays — and with its complementary #828D0C. In UI, a softer accent is often easier to use than the exact complement. Explore the harmonies, shades, tints and ready-made palettes for #170C8D below.

Is #170C8D good for buttons?

#170C8D works well for buttons and highlights, but use white text on #170C8D — black text only reaches 1.47:1, below the 4.5:1 needed for normal-size labels.

Is #170C8D the same as CSS darkblue?

No — #170C8D is not the CSS named color darkblue, but darkblue (#00008B) is the closest CSS named color.

#170C8D Color — HEX, RGB, HSL, Palette & Shades

Palettes built on #170C8D

Not just a swatch — here's how #170C8D works with other colors. Named schemes with #170C8D in its natural role, and a note on why the supporting colors balance it.

Luxury Packaging Feature · 5 colors

Feature #170C8D Anchor #141210 Accent #DC9659 Secondary #252933 Surface #F3ECE3

Phthalo Blue 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.

Tech Product Signal · 5 colors

Signal #170C8D Surface #14161A Highlight #F4F6F8 Secondary #5B6672 Accent #2F40AB

Phthalo 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 Phthalo Blue.

Moody Editorial Color · 5 colors

Color #170C8D Anchor #2A2A2E Secondary #6E6E74 Surface #EEE5DB Accent #180049

Phthalo Blue adds the colour to this moody editorial scheme — charcoal and a mid-grey around it, a bone highlight, and a muted jewel accent drawn from Phthalo Blue.

Coastal Morning Lead · 5 colors

Lead #170C8D Accent #A5C4C2 Surface #EAD5C0 Secondary #9AA0A1 Anchor #21344A

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

Minimal Editorial Surface · 5 colors

Surface #F8F4EF Accent #170C8D Secondary #47537A Support #9D8F88 Ink #18140F

Phthalo 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 Phthalo Blue carrying the quiet middle.

Build a working theme in the generator →

Color Lab

How #170C8D 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 12/100

Cool

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

Softness 21/100

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 19/100

Very low

Clean and current — no dusty, aged cast.

Luxury 67/100

High

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

Brand distinctiveness 73/100

High

Bold and ownable — memorable as a primary brand color.

UI accent fit 39/100

Low

Workable accent with care around contrast.

Surface fit 20/100

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 #170C8D

For UI

For branding

For interior

For fashion

People also use #170C8D with

Denim Blue Indigo Olive 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 14.3:1. Use

Subtle surface Use #C9C6F1 for cards and hover fills. Tint 80

Avoid beside #420C8D — 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 #170C8D 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: #170C8D;
  --color-base-rgb: 23 12 141;
  --color-base-oklch: oklch(30.8% 0.190 270.2);
  --color-50: #F1F0FE;
  --color-100: #DBD8FD;
  --color-200: #BAB4F8;
  --color-300: #8A81EE;
  --color-400: #5F53DF;
  --color-500: #3D30C4;
  --color-600: #352D95;
  --color-700: #2B2569;
  --color-800: #201C45;
  --color-900: #15132A;
  --color-on-base: #FFFFFF;
}

// tailwind.config.js
colors: {
  phthalo-blue: {
    50: '#F1F0FE',
    100: '#DBD8FD',
    200: '#BAB4F8',
    300: '#8A81EE',
    400: '#5F53DF',
    500: '#3D30C4',
    600: '#352D95',
    700: '#2B2569',
    800: '#201C45',
    900: '#15132A',
  },
}

$base: #170C8D;
$base-ink: #FFFFFF;
$base-50: #F1F0FE;
$base-100: #DBD8FD;
$base-200: #BAB4F8;
$base-300: #8A81EE;
$base-400: #5F53DF;
$base-500: #3D30C4;
$base-600: #352D95;
$base-700: #2B2569;
$base-800: #201C45;
$base-900: #15132A;
$base-hover: #120A71;
$base-subtle: #ADA7EC;

{
    "color": {
        "base": {
            "value": "#170C8D",
            "type": "color"
        },
        "onBase": {
            "value": "#FFFFFF",
            "type": "color"
        },
        "scale": {
            "50": {
                "value": "#F1F0FE",
                "type": "color"
            },
            "100": {
                "value": "#DBD8FD",
                "type": "color"
            },
            "200": {
                "value": "#BAB4F8",
                "type": "color"
            },
            "300": {
                "value": "#8A81EE",
                "type": "color"
            },
            "400": {
                "value": "#5F53DF",
                "type": "color"
            },
            "500": {
                "value": "#3D30C4",
                "type": "color"
            },
            "600": {
                "value": "#352D95",
                "type": "color"
            },
            "700": {
                "value": "#2B2569",
                "type": "color"
            },
            "800": {
                "value": "#201C45",
                "type": "color"
            },
            "900": {
                "value": "#15132A",
                "type": "color"
            }
        }
    }
}

Palettes built on #170C8D

Color Lab

Pairs with #170C8D

UI roles & guardrails

In real applications

Scales

Every model

Export