What color is #37397A?

#37397A is a dark blue-violet. In RGB it is rgb(55, 57, 122), and in HSL hsl(238, 38%, 35%).

Is #37397A accessible as text?

On white, #37397A has a contrast ratio of 10.35:1 (passes WCAG AA for body text); on black it is 2.03:1 (fails). For text placed on #37397A, use white for the best readability.

What is the closest Tailwind color to #37397A?

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

What colors go well with #37397A?

#37397A pairs cleanly with neutrals — cream, taupe, charcoal and cool grays — and with its complementary #7B7937. In UI, a softer accent is often easier to use than the exact complement. Explore the harmonies, shades, tints and ready-made palettes for #37397A below.

Is #37397A good for buttons?

#37397A works well for buttons and highlights, but use white text on #37397A — black text only reaches 2.03:1, below the 4.5:1 needed for normal-size labels.

Is #37397A the same as CSS darkslateblue?

No — #37397A is not the CSS named color darkslateblue, but darkslateblue (#483D8B) is the closest CSS named color.

#37397A Color — HEX, RGB, HSL, Palette & Shades

Palettes built on #37397A

Not just a swatch — here's how #37397A works with other colors. Named schemes with #37397A in its natural role, and a note on why the supporting colors balance it.

Luxury Packaging Feature · 5 colors

Feature #37397A Anchor #141210 Accent #DC9758 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 #37397A Anchor #2A2A2E Secondary #6E6E74 Surface #EEE5DB Accent #281A44

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 #37397A 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 #37397A 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.

Minimal Editorial Surface · 5 colors

Surface #F8F4EF Accent #37397A Secondary #63677F 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 #37397A 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 29/100

Cool

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

Softness 33/100

Low

Middle-weight — neither delicate nor heavy.

Depth 62/100

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 44/100

Moderate

A faint retro warmth without tipping into sepia.

Luxury 68/100

High

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

Brand distinctiveness 42/100

Moderate

Recognisable but shares space with nearby hues.

UI accent fit 65/100

High

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

Surface fit 27/100

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 #37397A

For UI

For branding

For interior

For fashion

People also use #37397A with

Teal Blue Eminence Olive 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 #D5D5E7 for cards and hover fills. Tint 80

Avoid beside #4C377B — 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 #37397A 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: #37397A;
  --color-base-rgb: 55 57 122;
  --color-base-oklch: oklch(37.9% 0.108 278.6);
  --color-50: #F4F4FB;
  --color-100: #E2E3F3;
  --color-200: #C7C8E6;
  --color-300: #9FA1D0;
  --color-400: #7A7CB8;
  --color-500: #595B9C;
  --color-600: #494B79;
  --color-700: #383957;
  --color-800: #27283A;
  --color-900: #191A24;
  --color-on-base: #FFFFFF;
}

// tailwind.config.js
colors: {
  dark-slate-blue: {
    50: '#F4F4FB',
    100: '#E2E3F3',
    200: '#C7C8E6',
    300: '#9FA1D0',
    400: '#7A7CB8',
    500: '#595B9C',
    600: '#494B79',
    700: '#383957',
    800: '#27283A',
    900: '#191A24',
  },
}

$base: #37397A;
$base-ink: #FFFFFF;
$base-50: #F4F4FB;
$base-100: #E2E3F3;
$base-200: #C7C8E6;
$base-300: #9FA1D0;
$base-400: #7A7CB8;
$base-500: #595B9C;
$base-600: #494B79;
$base-700: #383957;
$base-800: #27283A;
$base-900: #191A24;
$base-hover: #2C2E63;
$base-subtle: #BFC0DC;

{
    "color": {
        "base": {
            "value": "#37397A",
            "type": "color"
        },
        "onBase": {
            "value": "#FFFFFF",
            "type": "color"
        },
        "scale": {
            "50": {
                "value": "#F4F4FB",
                "type": "color"
            },
            "100": {
                "value": "#E2E3F3",
                "type": "color"
            },
            "200": {
                "value": "#C7C8E6",
                "type": "color"
            },
            "300": {
                "value": "#9FA1D0",
                "type": "color"
            },
            "400": {
                "value": "#7A7CB8",
                "type": "color"
            },
            "500": {
                "value": "#595B9C",
                "type": "color"
            },
            "600": {
                "value": "#494B79",
                "type": "color"
            },
            "700": {
                "value": "#383957",
                "type": "color"
            },
            "800": {
                "value": "#27283A",
                "type": "color"
            },
            "900": {
                "value": "#191A24",
                "type": "color"
            }
        }
    }
}

Palettes built on #37397A

Color Lab

Pairs with #37397A

UI roles & guardrails

In real applications

Scales

Every model

Export