What color is #155CD0?

#155CD0 is a medium, vivid blue. In RGB it is rgb(21, 92, 208), and in HSL hsl(217, 82%, 45%).

Is #155CD0 accessible as text?

On white, #155CD0 has a contrast ratio of 6.05:1 (passes WCAG AA for body text); on black it is 3.47:1 (fails). For text placed on #155CD0, use white for the best readability.

What is the closest Tailwind color to #155CD0?

The nearest Tailwind CSS token is blue-700 (#1447E6).

What colors go well with #155CD0?

#155CD0 pairs cleanly with neutrals — cream, taupe, charcoal and cool grays — and with its complementary #D18915. In UI, a softer accent is often easier to use than the exact complement. Explore the harmonies, shades, tints and ready-made palettes for #155CD0 below.

Is #155CD0 good for buttons?

#155CD0 works well for buttons and highlights, but use white text on #155CD0 — black text only reaches 3.47:1, below the 4.5:1 needed for normal-size labels.

Is #155CD0 the same as CSS royalblue?

No — #155CD0 is not the CSS named color royalblue, but royalblue (#4169E1) is the closest CSS named color.

#155CD0 Color — HEX, RGB, HSL, Palette & Shades

Palettes built on #155CD0

Not just a swatch — here's how #155CD0 works with other colors. Named schemes with #155CD0 in its natural role, and a note on why the supporting colors balance it.

Tech Product Signal · 5 colors

Signal #155CD0 Surface #14161A Highlight #F4F6F8 Secondary #5A6672 Accent #4684EF

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

Coastal Morning Lead · 5 colors

Lead #155CD0 Accent #A5C4C1 Surface #DDDBBF Secondary #9AA0A1 Anchor #21344A

Denim Blue 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 #155CD0 Surface #F6E5D8 Anchor #5A2144 Accent #E4C2CA Secondary #322B2F

Denim Blue 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 #155CD0 Secondary #778FB8 Support #9D8F88 Ink #16140F

Denim 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 Denim Blue carrying the quiet middle.

Sunset Warmth Glow · 5 colors

Glow #155CD0 Secondary #E76A76 Accent #F79152 Anchor #573B58 Surface #EEEBD6

Denim Blue 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 #155CD0 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 33/100

Low

Middle-weight — neither delicate nor heavy.

Depth 53/100

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 51/100

Moderate

Understated — leans refined without going austere.

Brand distinctiveness 74/100

High

Bold and ownable — memorable as a primary brand color.

UI accent fit 89/100

Very high

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

Surface fit 8/100

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 #155CD0

For UI

For branding

For interior

For fashion

People also use #155CD0 with

Turquoise Medium Blue Dark Goldenrod Gainsboro Charcoal

UI roles & guardrails

Primary action Safe as a filled button with white label. AA

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 6.0:1. Use

Subtle surface Use #D2DFF4 for cards and hover fills. Tint 80

Avoid beside #151ED1 — 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 #155CD0 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: #155CD0;
  --color-base-rgb: 21 92 208;
  --color-base-oklch: oklch(50.6% 0.192 260.4);
  --color-50: #F0F6FE;
  --color-100: #D9E6FC;
  --color-200: #B5CEF8;
  --color-300: #83ABED;
  --color-400: #5589DD;
  --color-500: #326AC3;
  --color-600: #2E5594;
  --color-700: #264069;
  --color-800: #1D2C44;
  --color-900: #141C2A;
  --color-on-base: #FFFFFF;
}

// tailwind.config.js
colors: {
  denim-blue: {
    50: '#F0F6FE',
    100: '#D9E6FC',
    200: '#B5CEF8',
    300: '#83ABED',
    400: '#5589DD',
    500: '#326AC3',
    600: '#2E5594',
    700: '#264069',
    800: '#1D2C44',
    900: '#141C2A',
  },
}

$base: #155CD0;
$base-ink: #FFFFFF;
$base-50: #F0F6FE;
$base-100: #D9E6FC;
$base-200: #B5CEF8;
$base-300: #83ABED;
$base-400: #5589DD;
$base-500: #326AC3;
$base-600: #2E5594;
$base-700: #264069;
$base-800: #1D2C44;
$base-900: #141C2A;
$base-hover: #114AA7;
$base-subtle: #BBCFEF;

{
    "color": {
        "base": {
            "value": "#155CD0",
            "type": "color"
        },
        "onBase": {
            "value": "#FFFFFF",
            "type": "color"
        },
        "scale": {
            "50": {
                "value": "#F0F6FE",
                "type": "color"
            },
            "100": {
                "value": "#D9E6FC",
                "type": "color"
            },
            "200": {
                "value": "#B5CEF8",
                "type": "color"
            },
            "300": {
                "value": "#83ABED",
                "type": "color"
            },
            "400": {
                "value": "#5589DD",
                "type": "color"
            },
            "500": {
                "value": "#326AC3",
                "type": "color"
            },
            "600": {
                "value": "#2E5594",
                "type": "color"
            },
            "700": {
                "value": "#264069",
                "type": "color"
            },
            "800": {
                "value": "#1D2C44",
                "type": "color"
            },
            "900": {
                "value": "#141C2A",
                "type": "color"
            }
        }
    }
}