What color is #373290?

#373290 is a dark blue-violet. In RGB it is rgb(55, 50, 144), and in HSL hsl(243, 48%, 38%).

Is #373290 accessible as text?

On white, #373290 has a contrast ratio of 10.39:1 (passes WCAG AA for body text); on black it is 2.02:1 (fails). For text placed on #373290, use white for the best readability.

What is the closest Tailwind color to #373290?

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

What colors go well with #373290?

#373290 pairs cleanly with neutrals — cream, taupe, charcoal and cool grays — and with its complementary #8B8F32. In UI, a softer accent is often easier to use than the exact complement. Explore the harmonies, shades, tints and ready-made palettes for #373290 below.

Is #373290 good for buttons?

#373290 works well for buttons and highlights, but use white text on #373290 — black text only reaches 2.02:1, below the 4.5:1 needed for normal-size labels.

Is #373290 the same as CSS darkslateblue?

No — #373290 is not the CSS named color darkslateblue, but darkslateblue (#483D8B) is the closest CSS named color.

#373290 Color — HEX, RGB, HSL, Palette & Shades

Palettes built on #373290

Not just a swatch — here's how #373290 works with other colors. Named schemes with #373290 in its natural role, and a note on why the supporting colors balance it.

Coastal Morning Lead · 5 colors

Lead #373290 Accent #A5C4C2 Surface #EAD5BF Secondary #9AA0A1 Anchor #22344A

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 #373290 Secondary #7F4534 Surface #EDD7C2 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.

Modern Café Dominant · 5 colors

Dominant #373290 Anchor #3B2923 Surface #F3E1D2 Accent #769F7B Secondary #3C3734

Dark Slate Blue anchors this café scheme as the warm mid-tone, lifted by latte cream and a muted sage accent and grounded by espresso brown and a warm charcoal.

Berry & Cream Lead · 5 colors

Lead #373290 Surface #F6E5D8 Anchor #5B2142 Accent #E5C2C9 Secondary #322B2F

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

Minimal Editorial Surface · 5 colors

Surface #F8F4EF Accent #373290 Secondary #636788 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 #373290 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 21/100

Cool

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

Softness 29/100

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 34/100

Low

A faint retro warmth without tipping into sepia.

Luxury 65/100

High

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

Brand distinctiveness 40/100

Moderate

Recognisable but shares space with nearby hues.

UI accent fit 69/100

High

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

Surface fit 15/100

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 #373290

For UI

For branding

For interior

For fashion

People also use #373290 with

Steel Blue Rebecca Purple Moss Green 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 10.4:1. Use

Subtle surface Use #D6D4EA for cards and hover fills. Tint 80

Avoid beside #56328F — 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 #373290 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: #373290;
  --color-base-rgb: 55 50 144;
  --color-base-oklch: oklch(38.4% 0.150 279.0);
  --color-50: #F4F3FB;
  --color-100: #E1E0F5;
  --color-200: #C5C3EA;
  --color-300: #9C99D7;
  --color-400: #7571C1;
  --color-500: #5450A5;
  --color-600: #46437F;
  --color-700: #36345B;
  --color-800: #26253C;
  --color-900: #191825;
  --color-on-base: #FFFFFF;
}

// tailwind.config.js
colors: {
  dark-slate-blue: {
    50: '#F4F3FB',
    100: '#E1E0F5',
    200: '#C5C3EA',
    300: '#9C99D7',
    400: '#7571C1',
    500: '#5450A5',
    600: '#46437F',
    700: '#36345B',
    800: '#26253C',
    900: '#191825',
  },
}

$base: #373290;
$base-ink: #FFFFFF;
$base-50: #F4F3FB;
$base-100: #E1E0F5;
$base-200: #C5C3EA;
$base-300: #9C99D7;
$base-400: #7571C1;
$base-500: #5450A5;
$base-600: #46437F;
$base-700: #36345B;
$base-800: #26253C;
$base-900: #191825;
$base-hover: #2C2873;
$base-subtle: #C0BEE1;

{
    "color": {
        "base": {
            "value": "#373290",
            "type": "color"
        },
        "onBase": {
            "value": "#FFFFFF",
            "type": "color"
        },
        "scale": {
            "50": {
                "value": "#F4F3FB",
                "type": "color"
            },
            "100": {
                "value": "#E1E0F5",
                "type": "color"
            },
            "200": {
                "value": "#C5C3EA",
                "type": "color"
            },
            "300": {
                "value": "#9C99D7",
                "type": "color"
            },
            "400": {
                "value": "#7571C1",
                "type": "color"
            },
            "500": {
                "value": "#5450A5",
                "type": "color"
            },
            "600": {
                "value": "#46437F",
                "type": "color"
            },
            "700": {
                "value": "#36345B",
                "type": "color"
            },
            "800": {
                "value": "#26253C",
                "type": "color"
            },
            "900": {
                "value": "#191825",
                "type": "color"
            }
        }
    }
}

Palettes built on #373290

Color Lab

Pairs with #373290

UI roles & guardrails

In real applications

Scales

Every model

Export