What color is #370EB2?

#370EB2 is a dark, vivid indigo. In RGB it is rgb(55, 14, 178), and in HSL hsl(255, 85%, 38%).

Is #370EB2 accessible as text?

On white, #370EB2 has a contrast ratio of 11.24:1 (passes WCAG AA for body text); on black it is 1.87:1 (fails). For text placed on #370EB2, use white for the best readability.

What is the closest Tailwind color to #370EB2?

The nearest Tailwind CSS token is indigo-800 (#372AAC).

What colors go well with #370EB2?

#370EB2 pairs cleanly with neutrals — cream, taupe, charcoal and cool grays — and with its complementary #8AB30F. In UI, a softer accent is often easier to use than the exact complement. Explore the harmonies, shades, tints and ready-made palettes for #370EB2 below.

Is #370EB2 good for buttons?

#370EB2 works well for buttons and highlights, but use white text on #370EB2 — black text only reaches 1.87:1, below the 4.5:1 needed for normal-size labels.

Is #370EB2 the same as CSS mediumblue?

No — #370EB2 is not the CSS named color mediumblue, but mediumblue (#0000CD) is the closest CSS named color.

#370EB2 Color — HEX, RGB, HSL, Palette & Shades

Palettes built on #370EB2

Not just a swatch — here's how #370EB2 works with other colors. Named schemes with #370EB2 in its natural role, and a note on why the supporting colors balance it.

Luxury Packaging Feature · 5 colors

Feature #370EB2 Anchor #141210 Accent #DC9758 Secondary #262833 Surface #F3ECE3

Egyptian 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 #370EB2 Anchor #2A2A2E Secondary #6E6E74 Surface #EEE5DB Accent #300063

Egyptian 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 Egyptian Blue.

Minimal Editorial Surface · 5 colors

Surface #F8F4EF Accent #370EB2 Secondary #5F6495 Support #9D9088 Ink #18140F

Egyptian 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 Egyptian Blue carrying the quiet middle.

Coastal Morning Lead · 5 colors

Lead #370EB2 Accent #A5C4C2 Surface #EAD5BF Secondary #9AA0A1 Anchor #22344A

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

Sunset Warmth Glow · 5 colors

Glow #370EB2 Secondary #E86A71 Accent #F6934E Anchor #583B57 Surface #F7E7D7

Egyptian Blue glows at the center of this sunset palette, joined by coral and gold, deepened by a plum anchor and cooled with cream.

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Color Lab

How #370EB2 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 17/100

Cool

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

Softness 23/100

Low

Firm and assertive — carries weight and contrast.

Depth 68/100

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 14/100

Very low

Clean and current — no dusty, aged cast.

Luxury 59/100

Moderate

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

Brand distinctiveness 85/100

Very high

Bold and ownable — memorable as a primary brand color.

UI accent fit 52/100

Moderate

Workable accent with care around contrast.

Surface fit 15/100

Very low

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

Print safety 66/100

High

Prints close, with a slight loss of vibrancy.

Pairs with #370EB2

For UI

For branding

For interior

For fashion

People also use #370EB2 with

Cerulean Mauveine Greenery Gainsboro Russian Violet

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 11.2:1. Use

Subtle surface Use #D6CCF3 for cards and hover fills. Tint 80

Avoid beside #6F0FB3 — 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 #370EB2 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: #370EB2;
  --color-base-rgb: 55 14 178;
  --color-base-oklch: oklch(37.9% 0.221 278.8);
  --color-50: #F4F0FE;
  --color-100: #E1D8FD;
  --color-200: #C5B4F9;
  --color-300: #9C81EE;
  --color-400: #7653DF;
  --color-500: #5530C5;
  --color-600: #462C96;
  --color-700: #36256A;
  --color-800: #261C45;
  --color-900: #19132A;
  --color-on-base: #FFFFFF;
}

// tailwind.config.js
colors: {
  egyptian-blue: {
    50: '#F4F0FE',
    100: '#E1D8FD',
    200: '#C5B4F9',
    300: '#9C81EE',
    400: '#7653DF',
    500: '#5530C5',
    600: '#462C96',
    700: '#36256A',
    800: '#261C45',
    900: '#19132A',
  },
}

$base: #370EB2;
$base-ink: #FFFFFF;
$base-50: #F4F0FE;
$base-100: #E1D8FD;
$base-200: #C5B4F9;
$base-300: #9C81EE;
$base-400: #7653DF;
$base-500: #5530C5;
$base-600: #462C96;
$base-700: #36256A;
$base-800: #261C45;
$base-900: #19132A;
$base-hover: #2D0C8F;
$base-subtle: #C0B1EE;

{
    "color": {
        "base": {
            "value": "#370EB2",
            "type": "color"
        },
        "onBase": {
            "value": "#FFFFFF",
            "type": "color"
        },
        "scale": {
            "50": {
                "value": "#F4F0FE",
                "type": "color"
            },
            "100": {
                "value": "#E1D8FD",
                "type": "color"
            },
            "200": {
                "value": "#C5B4F9",
                "type": "color"
            },
            "300": {
                "value": "#9C81EE",
                "type": "color"
            },
            "400": {
                "value": "#7653DF",
                "type": "color"
            },
            "500": {
                "value": "#5530C5",
                "type": "color"
            },
            "600": {
                "value": "#462C96",
                "type": "color"
            },
            "700": {
                "value": "#36256A",
                "type": "color"
            },
            "800": {
                "value": "#261C45",
                "type": "color"
            },
            "900": {
                "value": "#19132A",
                "type": "color"
            }
        }
    }
}

Palettes built on #370EB2

Color Lab

Pairs with #370EB2

UI roles & guardrails

In real applications

Scales

Every model

Export