What color is #397DF3?

#397DF3 is a medium, vivid blue. In RGB it is rgb(57, 125, 243), and in HSL hsl(218, 89%, 59%).

Is #397DF3 accessible as text?

On white, #397DF3 has a contrast ratio of 3.89:1 (fails WCAG AA for body text); on black it is 5.40:1 (passes). For text placed on #397DF3, use black for the best readability.

What is the closest Tailwind color to #397DF3?

The nearest Tailwind CSS token is blue-500 (#2B7FFF).

What colors go well with #397DF3?

#397DF3 pairs cleanly with neutrals — cream, taupe, charcoal and cool grays — and with its complementary #F3AF39. In UI, a softer accent is often easier to use than the exact complement. Explore the harmonies, shades, tints and ready-made palettes for #397DF3 below.

Is #397DF3 good for buttons?

#397DF3 works well for buttons and highlights, but use black text on #397DF3 — white text only reaches 3.89:1, below the 4.5:1 needed for normal-size labels.

Is #397DF3 the same as CSS dodgerblue?

No — #397DF3 is not the CSS named color dodgerblue, but dodgerblue (#1E90FF) is the closest CSS named color.

#397DF3 Color — HEX, RGB, HSL, Palette & Shades

Palettes built on #397DF3

Not just a swatch — here's how #397DF3 works with other colors. Named schemes with #397DF3 in its natural role, and a note on why the supporting colors balance it.

Tech Product Signal · 5 colors

Signal #397DF3 Surface #14161A Highlight #F4F6F8 Secondary #5A6672 Accent #66A5FF

Azure is the vivid signal in this product UI — on a near-black surface with cool white, a slate grey and a lighter tint of Azure.

Coastal Morning Lead · 5 colors

Lead #397DF3 Accent #A5C4C1 Surface #DDDBBF Secondary #9AA0A1 Anchor #21344A

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

Berry & Cream Lead · 5 colors

Lead #397DF3 Surface #F6E5D8 Anchor #5A2144 Accent #E4C2CA Secondary #322B2F

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

Minimal Editorial Surface · 5 colors

Surface #F6F4EF Accent #397DF3 Secondary #96AFD9 Support #9D8F88 Ink #18140F

Azure 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 Azure carrying the quiet middle.

Sunset Warmth Glow · 5 colors

Glow #397DF3 Secondary #E76A76 Accent #F79152 Anchor #573B58 Surface #EEEBD6

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

Build a working theme in the generator →

Color Lab

How #397DF3 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 7/100

Cool

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

Softness 39/100

Low

Middle-weight — neither delicate nor heavy.

Depth 41/100

Moderate

Mid depth — usable as an accent or a muted ground.

Naturalness 0/100

Very low

Reads engineered rather than organic — synthetic, digital.

Vintage feel 26/100

Low

A faint retro warmth without tipping into sepia.

Luxury 42/100

Moderate

Understated — leans refined without going austere.

Brand distinctiveness 74/100

High

Bold and ownable — memorable as a primary brand color.

UI accent fit 81/100

Very high

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

Surface fit 18/100

Very low

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

Print safety 63/100

High

Prints close, with a slight loss of vibrancy.

Pairs with #397DF3

For UI

For branding

For interior

For fashion

People also use #397DF3 with

Electric Blue Han Purple Marigold Gainsboro Charcoal

UI roles & guardrails

Primary action Safe as a filled button with near-black label. AA

Body text Do not use for body copy on light surfaces. Avoid

Large display Fine for headings 24px+ on white. Pass

Background Pair with #141310 text at 4.8:1. Use

Subtle surface Use #DDE7F7 for cards and hover fills. Tint 80

Avoid beside #3940F3 — 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 #397DF3 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: #397DF3;
  --color-base-rgb: 57 125 243;
  --color-base-oklch: oklch(61.0% 0.190 260.6);
  --color-50: #F0F5FE;
  --color-100: #D8E6FD;
  --color-200: #B2CDFA;
  --color-300: #7EA8F1;
  --color-400: #4F85E3;
  --color-500: #2C66C9;
  --color-600: #2A5298;
  --color-700: #233E6B;
  --color-800: #1B2B46;
  --color-900: #131B2B;
  --color-on-base: #141310;
}

// tailwind.config.js
colors: {
  azure: {
    50: '#F0F5FE',
    100: '#D8E6FD',
    200: '#B2CDFA',
    300: '#7EA8F1',
    400: '#4F85E3',
    500: '#2C66C9',
    600: '#2A5298',
    700: '#233E6B',
    800: '#1B2B46',
    900: '#131B2B',
  },
}

$base: #397DF3;
$base-ink: #141310;
$base-50: #F0F5FE;
$base-100: #D8E6FD;
$base-200: #B2CDFA;
$base-300: #7EA8F1;
$base-400: #4F85E3;
$base-500: #2C66C9;
$base-600: #2A5298;
$base-700: #233E6B;
$base-800: #1B2B46;
$base-900: #131B2B;
$base-hover: #0D5CE3;
$base-subtle: #CADAF5;

{
    "color": {
        "base": {
            "value": "#397DF3",
            "type": "color"
        },
        "onBase": {
            "value": "#141310",
            "type": "color"
        },
        "scale": {
            "50": {
                "value": "#F0F5FE",
                "type": "color"
            },
            "100": {
                "value": "#D8E6FD",
                "type": "color"
            },
            "200": {
                "value": "#B2CDFA",
                "type": "color"
            },
            "300": {
                "value": "#7EA8F1",
                "type": "color"
            },
            "400": {
                "value": "#4F85E3",
                "type": "color"
            },
            "500": {
                "value": "#2C66C9",
                "type": "color"
            },
            "600": {
                "value": "#2A5298",
                "type": "color"
            },
            "700": {
                "value": "#233E6B",
                "type": "color"
            },
            "800": {
                "value": "#1B2B46",
                "type": "color"
            },
            "900": {
                "value": "#131B2B",
                "type": "color"
            }
        }
    }
}