What color is #2F348B?

#2F348B is a dark blue-violet. In RGB it is rgb(47, 52, 139), and in HSL hsl(237, 49%, 36%).

Is #2F348B accessible as text?

On white, #2F348B has a contrast ratio of 10.58:1 (passes WCAG AA for body text); on black it is 1.98:1 (fails). For text placed on #2F348B, use white for the best readability.

What is the closest Tailwind color to #2F348B?

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

What colors go well with #2F348B?

#2F348B pairs cleanly with neutrals — cream, taupe, charcoal and cool grays — and with its complementary #89842F. In UI, a softer accent is often easier to use than the exact complement. Explore the harmonies, shades, tints and ready-made palettes for #2F348B below.

Is #2F348B good for buttons?

#2F348B works well for buttons and highlights, but use white text on #2F348B — black text only reaches 1.98:1, below the 4.5:1 needed for normal-size labels.

Is #2F348B the same as CSS darkslateblue?

No — #2F348B is not the CSS named color darkslateblue, but darkslateblue (#483D8B) is the closest CSS named color.

#2F348B Color — HEX, RGB, HSL, Palette & Shades

Palettes built on #2F348B

Not just a swatch — here's how #2F348B works with other colors. Named schemes with #2F348B in its natural role, and a note on why the supporting colors balance it.

Luxury Packaging Feature · 5 colors

Feature #2F348B Anchor #141210 Accent #DC9659 Secondary #262833 Surface #F3ECE3

Dark Slate 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 #2F348B Anchor #2A2A2E Secondary #6E6E74 Surface #EEE5DB Accent #27154E

Dark Slate 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 Dark Slate Blue.

Coastal Morning Lead · 5 colors

Lead #2F348B Accent #A5C4C2 Surface #EAD5C0 Secondary #9AA0A1 Anchor #21344A

Dark Slate 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 #2F348B Secondary #7F4535 Surface #EED7C2 Accent #365247 Anchor #582239

Dark Slate 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 #2F348B Secondary #5F6685 Support #9D9088 Ink #18140F

Dark Slate 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 Dark Slate Blue carrying the quiet middle.

Build a working theme in the generator →

Color Lab

How #2F348B 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 20/100

Cool

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

Softness 30/100

Low

Firm and assertive — carries weight and contrast.

Depth 64/100

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 35/100

Low

A faint retro warmth without tipping into sepia.

Luxury 66/100

High

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

Brand distinctiveness 55/100

Moderate

Recognisable but shares space with nearby hues.

UI accent fit 67/100

High

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

Surface fit 17/100

Very low

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

Print safety 77/100

High

Reproduces faithfully in CMYK — safe for packaging and print.

Pairs with #2F348B

For UI

For branding

For interior

For fashion

People also use #2F348B with

Steel Blue Rebecca Purple 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 10.6:1. Use

Subtle surface Use #D3D4EA for cards and hover fills. Tint 80

Avoid beside #482F89 — 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 #2F348B 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: #2F348B;
  --color-base-rgb: 47 52 139;
  --color-base-oklch: oklch(37.7% 0.142 274.8);
  --color-50: #F3F4FB;
  --color-100: #E0E1F5;
  --color-200: #C2C4EA;
  --color-300: #989BD7;
  --color-400: #7074C2;
  --color-500: #4F54A6;
  --color-600: #42457F;
  --color-700: #34365B;
  --color-800: #25263C;
  --color-900: #181925;
  --color-on-base: #FFFFFF;
}

// tailwind.config.js
colors: {
  dark-slate-blue: {
    50: '#F3F4FB',
    100: '#E0E1F5',
    200: '#C2C4EA',
    300: '#989BD7',
    400: '#7074C2',
    500: '#4F54A6',
    600: '#42457F',
    700: '#34365B',
    800: '#25263C',
    900: '#181925',
  },
}

$base: #2F348B;
$base-ink: #FFFFFF;
$base-50: #F3F4FB;
$base-100: #E0E1F5;
$base-200: #C2C4EA;
$base-300: #989BD7;
$base-400: #7074C2;
$base-500: #4F54A6;
$base-600: #42457F;
$base-700: #34365B;
$base-800: #25263C;
$base-900: #181925;
$base-hover: #25296D;
$base-subtle: #BCBEE0;

{
    "color": {
        "base": {
            "value": "#2F348B",
            "type": "color"
        },
        "onBase": {
            "value": "#FFFFFF",
            "type": "color"
        },
        "scale": {
            "50": {
                "value": "#F3F4FB",
                "type": "color"
            },
            "100": {
                "value": "#E0E1F5",
                "type": "color"
            },
            "200": {
                "value": "#C2C4EA",
                "type": "color"
            },
            "300": {
                "value": "#989BD7",
                "type": "color"
            },
            "400": {
                "value": "#7074C2",
                "type": "color"
            },
            "500": {
                "value": "#4F54A6",
                "type": "color"
            },
            "600": {
                "value": "#42457F",
                "type": "color"
            },
            "700": {
                "value": "#34365B",
                "type": "color"
            },
            "800": {
                "value": "#25263C",
                "type": "color"
            },
            "900": {
                "value": "#181925",
                "type": "color"
            }
        }
    }
}

Palettes built on #2F348B

Color Lab

Pairs with #2F348B

UI roles & guardrails

In real applications

Scales

Every model

Export