What color is #17138F?

#17138F is a dark, vivid blue. In RGB it is rgb(23, 19, 143), and in HSL hsl(242, 77%, 32%).

Is #17138F accessible as text?

On white, #17138F has a contrast ratio of 13.76:1 (passes WCAG AA for body text); on black it is 1.53:1 (fails). For text placed on #17138F, use white for the best readability.

What is the closest Tailwind color to #17138F?

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

What colors go well with #17138F?

#17138F pairs cleanly with neutrals — cream, taupe, charcoal and cool grays — and with its complementary #8C9013. In UI, a softer accent is often easier to use than the exact complement. Explore the harmonies, shades, tints and ready-made palettes for #17138F below.

Is #17138F good for buttons?

#17138F works well for buttons and highlights, but use white text on #17138F — black text only reaches 1.53:1, below the 4.5:1 needed for normal-size labels.

Is #17138F the same as CSS darkblue?

No — #17138F is not the CSS named color darkblue, but darkblue (#00008B) is the closest CSS named color.

#17138F Color — HEX, RGB, HSL, Palette & Shades

Palettes built on #17138F

Not just a swatch — here's how #17138F works with other colors. Named schemes with #17138F in its natural role, and a note on why the supporting colors balance it.

Luxury Packaging Feature · 5 colors

Feature #17138F 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 #17138F Surface #14161A Highlight #F4F6F8 Secondary #5B6672 Accent #3044AD

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 #17138F Anchor #2A2A2E Secondary #6E6E74 Surface #EEE5DB Accent #19004B

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 #17138F 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 #17138F Secondary #49557C 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 #17138F 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 22/100

Low

Firm and assertive — carries weight and contrast.

Depth 73/100

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 20/100

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 42/100

Moderate

Workable accent with care around contrast.

Surface fit 19/100

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 #17138F

For UI

For branding

For interior

For fashion

People also use #17138F 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 13.8:1. Use

Subtle surface Use #CAC9F0 for cards and hover fills. Tint 80

Avoid beside #411390 — 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 #17138F 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: #17138F;
  --color-base-rgb: 23 19 143;
  --color-base-oklch: oklch(31.7% 0.188 269.8);
  --color-50: #F1F1FE;
  --color-100: #DBDAFB;
  --color-200: #B9B7F5;
  --color-300: #8986E9;
  --color-400: #5E59D9;
  --color-500: #3B37BE;
  --color-600: #343191;
  --color-700: #2A2866;
  --color-800: #1F1E43;
  --color-900: #151429;
  --color-on-base: #FFFFFF;
}

// tailwind.config.js
colors: {
  phthalo-blue: {
    50: '#F1F1FE',
    100: '#DBDAFB',
    200: '#B9B7F5',
    300: '#8986E9',
    400: '#5E59D9',
    500: '#3B37BE',
    600: '#343191',
    700: '#2A2866',
    800: '#1F1E43',
    900: '#151429',
  },
}

$base: #17138F;
$base-ink: #FFFFFF;
$base-50: #F1F1FE;
$base-100: #DBDAFB;
$base-200: #B9B7F5;
$base-300: #8986E9;
$base-400: #5E59D9;
$base-500: #3B37BE;
$base-600: #343191;
$base-700: #2A2866;
$base-800: #1F1E43;
$base-900: #151429;
$base-hover: #120F74;
$base-subtle: #AFADE9;

{
    "color": {
        "base": {
            "value": "#17138F",
            "type": "color"
        },
        "onBase": {
            "value": "#FFFFFF",
            "type": "color"
        },
        "scale": {
            "50": {
                "value": "#F1F1FE",
                "type": "color"
            },
            "100": {
                "value": "#DBDAFB",
                "type": "color"
            },
            "200": {
                "value": "#B9B7F5",
                "type": "color"
            },
            "300": {
                "value": "#8986E9",
                "type": "color"
            },
            "400": {
                "value": "#5E59D9",
                "type": "color"
            },
            "500": {
                "value": "#3B37BE",
                "type": "color"
            },
            "600": {
                "value": "#343191",
                "type": "color"
            },
            "700": {
                "value": "#2A2866",
                "type": "color"
            },
            "800": {
                "value": "#1F1E43",
                "type": "color"
            },
            "900": {
                "value": "#151429",
                "type": "color"
            }
        }
    }
}

Palettes built on #17138F

Color Lab

Pairs with #17138F

UI roles & guardrails

In real applications

Scales

Every model

Export