What color is #303173?

#303173 is a dark blue-violet. In RGB it is rgb(48, 49, 115), and in HSL hsl(239, 41%, 32%).

Is #303173 accessible as text?

On white, #303173 has a contrast ratio of 11.59:1 (passes WCAG AA for body text); on black it is 1.81:1 (fails). For text placed on #303173, use white for the best readability.

What is the closest Tailwind color to #303173?

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

What colors go well with #303173?

#303173 pairs cleanly with neutrals — cream, taupe, charcoal and cool grays — and with its complementary #737230. In UI, a softer accent is often easier to use than the exact complement. Explore the harmonies, shades, tints and ready-made palettes for #303173 below.

Is #303173 good for buttons?

#303173 works well for buttons and highlights, but use white text on #303173 — black text only reaches 1.81:1, below the 4.5:1 needed for normal-size labels.

Is #303173 the same as CSS darkslateblue?

No — #303173 is not the CSS named color darkslateblue, but darkslateblue (#483D8B) is the closest CSS named color.

#303173 Color — HEX, RGB, HSL, Palette & Shades

Palettes built on #303173

Not just a swatch — here's how #303173 works with other colors. Named schemes with #303173 in its natural role, and a note on why the supporting colors balance it.

Luxury Packaging Feature · 5 colors

Feature #303173 Anchor #141210 Accent #DC9758 Secondary #262833 Surface #F3ECE3

Yale 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.

Moody Editorial Color · 5 colors

Color #303173 Anchor #2A2A2E Secondary #6E6E74 Surface #EEE5DB Accent #22133D

Yale 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 Yale Blue.

Coastal Morning Lead · 5 colors

Lead #303173 Accent #A5C4C2 Surface #EAD5BF Secondary #9AA0A1 Anchor #22344A

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

Vintage Leather Lead · 5 colors

Lead #303173 Secondary #7F4534 Surface #EED7C2 Accent #365247 Anchor #582239

Yale 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.

Minimal Editorial Surface · 5 colors

Surface #F8F4EF Accent #303173 Secondary #5C5F77 Support #9D9088 Ink #18140F

Yale 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 Yale Blue carrying the quiet middle.

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Color Lab

How #303173 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 28/100

Cool

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

Softness 30/100

Low

Firm and assertive — carries weight and contrast.

Depth 65/100

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 41/100

Moderate

A faint retro warmth without tipping into sepia.

Luxury 71/100

High

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

Brand distinctiveness 43/100

Moderate

Recognisable but shares space with nearby hues.

UI accent fit 56/100

Moderate

Workable accent with care around contrast.

Surface fit 28/100

Low

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

Print safety 83/100

Very high

Reproduces faithfully in CMYK — safe for packaging and print.

Pairs with #303173

For UI

For branding

For interior

For fashion

People also use #303173 with

Teal Blue Eminence Olive Brown 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 11.6:1. Use

Subtle surface Use #D2D2E7 for cards and hover fills. Tint 80

Avoid beside #453073 — 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 #303173 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: #303173;
  --color-base-rgb: 48 49 115;
  --color-base-oklch: oklch(35.2% 0.111 278.4);
  --color-50: #F4F4FB;
  --color-100: #E2E2F3;
  --color-200: #C6C6E7;
  --color-300: #9D9ED2;
  --color-400: #7778BB;
  --color-500: #56589E;
  --color-600: #47487A;
  --color-700: #373758;
  --color-800: #27273A;
  --color-900: #191924;
  --color-on-base: #FFFFFF;
}

// tailwind.config.js
colors: {
  yale-blue: {
    50: '#F4F4FB',
    100: '#E2E2F3',
    200: '#C6C6E7',
    300: '#9D9ED2',
    400: '#7778BB',
    500: '#56589E',
    600: '#47487A',
    700: '#373758',
    800: '#27273A',
    900: '#191924',
  },
}

$base: #303173;
$base-ink: #FFFFFF;
$base-50: #F4F4FB;
$base-100: #E2E2F3;
$base-200: #C6C6E7;
$base-300: #9D9ED2;
$base-400: #7778BB;
$base-500: #56589E;
$base-600: #47487A;
$base-700: #373758;
$base-800: #27273A;
$base-900: #191924;
$base-hover: #27275C;
$base-subtle: #BBBBDB;

{
    "color": {
        "base": {
            "value": "#303173",
            "type": "color"
        },
        "onBase": {
            "value": "#FFFFFF",
            "type": "color"
        },
        "scale": {
            "50": {
                "value": "#F4F4FB",
                "type": "color"
            },
            "100": {
                "value": "#E2E2F3",
                "type": "color"
            },
            "200": {
                "value": "#C6C6E7",
                "type": "color"
            },
            "300": {
                "value": "#9D9ED2",
                "type": "color"
            },
            "400": {
                "value": "#7778BB",
                "type": "color"
            },
            "500": {
                "value": "#56589E",
                "type": "color"
            },
            "600": {
                "value": "#47487A",
                "type": "color"
            },
            "700": {
                "value": "#373758",
                "type": "color"
            },
            "800": {
                "value": "#27273A",
                "type": "color"
            },
            "900": {
                "value": "#191924",
                "type": "color"
            }
        }
    }
}

Palettes built on #303173

Color Lab

Pairs with #303173

UI roles & guardrails

In real applications

Scales

Every model

Export