What color is #137CEC?

#137CEC is a medium, vivid blue. In RGB it is rgb(19, 124, 236), and in HSL hsl(211, 85%, 50%).

Is #137CEC accessible as text?

On white, #137CEC has a contrast ratio of 4.10:1 (fails WCAG AA for body text); on black it is 5.12:1 (passes). For text placed on #137CEC, use black for the best readability.

What is the closest Tailwind color to #137CEC?

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

What colors go well with #137CEC?

#137CEC pairs cleanly with neutrals — cream, taupe, charcoal and cool grays — and with its complementary #EC8313. In UI, a softer accent is often easier to use than the exact complement. Explore the harmonies, shades, tints and ready-made palettes for #137CEC below.

Is #137CEC good for buttons?

#137CEC works well for buttons and highlights, but use black text on #137CEC — white text only reaches 4.10:1, below the 4.5:1 needed for normal-size labels.

Is #137CEC the same as CSS royalblue?

No — #137CEC is not the CSS named color royalblue, but royalblue (#4169E1) is the closest CSS named color.

#137CEC Color — HEX, RGB, HSL, Palette & Shades

Palettes built on #137CEC

Not just a swatch — here's how #137CEC works with other colors. Named schemes with #137CEC in its natural role, and a note on why the supporting colors balance it.

Tech Product Signal · 5 colors

Signal #137CEC Surface #14161A Highlight #F4F6F8 Secondary #5A6672 Accent #51A4FF

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 #137CEC Accent #A5C4C1 Surface #DDDBBF Secondary #9AA0A1 Anchor #20344A

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 #137CEC Surface #EDE9D6 Anchor #5A2145 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 #137CEC Secondary #8DACD3 Support #9D8F89 Ink #16140F

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 #137CEC Secondary #E76A77 Accent #F79153 Anchor #573B59 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 #137CEC 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 5/100

Cool

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

Softness 38/100

Low

Middle-weight — neither delicate nor heavy.

Depth 43/100

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 44/100

Moderate

Understated — leans refined without going austere.

Brand distinctiveness 73/100

High

Bold and ownable — memorable as a primary brand color.

UI accent fit 84/100

Very high

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

Surface fit 16/100

Very low

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

Print safety 61/100

High

Prints close, with a slight loss of vibrancy.

Pairs with #137CEC

For UI

For branding

For interior

For fashion

People also use #137CEC with

Turquoise Blue Peru 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 4.5:1. Use

Subtle surface Use #D6E5F5 for cards and hover fills. Tint 80

Avoid beside #1334EC — 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 #137CEC 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: #137CEC;
  --color-base-rgb: 19 124 236;
  --color-base-oklch: oklch(59.5% 0.190 255.4);
  --color-50: #F0F7FE;
  --color-100: #D8EAFD;
  --color-200: #B4D5F9;
  --color-300: #81B6EE;
  --color-400: #5397DF;
  --color-500: #3078C5;
  --color-600: #2C5F96;
  --color-700: #25466A;
  --color-800: #1C3045;
  --color-900: #131E2A;
  --color-on-base: #141310;
}

// tailwind.config.js
colors: {
  azure: {
    50: '#F0F7FE',
    100: '#D8EAFD',
    200: '#B4D5F9',
    300: '#81B6EE',
    400: '#5397DF',
    500: '#3078C5',
    600: '#2C5F96',
    700: '#25466A',
    800: '#1C3045',
    900: '#131E2A',
  },
}

$base: #137CEC;
$base-ink: #141310;
$base-50: #F0F7FE;
$base-100: #D8EAFD;
$base-200: #B4D5F9;
$base-300: #81B6EE;
$base-400: #5397DF;
$base-500: #3078C5;
$base-600: #2C5F96;
$base-700: #25466A;
$base-800: #1C3045;
$base-900: #131E2A;
$base-hover: #0F63BD;
$base-subtle: #C0D8F1;

{
    "color": {
        "base": {
            "value": "#137CEC",
            "type": "color"
        },
        "onBase": {
            "value": "#141310",
            "type": "color"
        },
        "scale": {
            "50": {
                "value": "#F0F7FE",
                "type": "color"
            },
            "100": {
                "value": "#D8EAFD",
                "type": "color"
            },
            "200": {
                "value": "#B4D5F9",
                "type": "color"
            },
            "300": {
                "value": "#81B6EE",
                "type": "color"
            },
            "400": {
                "value": "#5397DF",
                "type": "color"
            },
            "500": {
                "value": "#3078C5",
                "type": "color"
            },
            "600": {
                "value": "#2C5F96",
                "type": "color"
            },
            "700": {
                "value": "#25466A",
                "type": "color"
            },
            "800": {
                "value": "#1C3045",
                "type": "color"
            },
            "900": {
                "value": "#131E2A",
                "type": "color"
            }
        }
    }
}