What color is #1C637F?

#1C637F is a dark cyan-blue. In RGB it is rgb(28, 99, 127), and in HSL hsl(197, 64%, 30%).

Is #1C637F accessible as text?

On white, #1C637F has a contrast ratio of 6.69:1 (passes WCAG AA for body text); on black it is 3.14:1 (fails). For text placed on #1C637F, use white for the best readability.

What is the closest Tailwind color to #1C637F?

The nearest Tailwind CSS token is cyan-800 (#005F78).

What colors go well with #1C637F?

#1C637F pairs cleanly with neutrals — cream, taupe, charcoal and cool grays — and with its complementary #7D371C. In UI, a softer accent is often easier to use than the exact complement. Explore the harmonies, shades, tints and ready-made palettes for #1C637F below.

Is #1C637F good for buttons?

#1C637F works well for buttons and highlights, but use white text on #1C637F — black text only reaches 3.14:1, below the 4.5:1 needed for normal-size labels.

Is #1C637F the same as CSS darkslategray?

No — #1C637F is not the CSS named color darkslategray, but darkslategray (#2F4F4F) is the closest CSS named color.

#1C637F Color — HEX, RGB, HSL, Palette & Shades

Palettes built on #1C637F

Not just a swatch — here's how #1C637F works with other colors. Named schemes with #1C637F in its natural role, and a note on why the supporting colors balance it.

Coastal Morning Lead · 5 colors

Lead #1C637F Accent #A6C4BF Surface #DEDABF Secondary #9AA0A0 Anchor #1F344A

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

Nordic Calm Accent · 5 colors

Accent #1C637F Secondary #AEB4B8 Surface #F1F2F0 Support #7B93A6 Anchor #2E3236

Lapis Lazuli keeps this Nordic scheme quiet — cool greys and a soft white around it, a muted-blue support and a charcoal anchor.

Tech Product Signal · 5 colors

Signal #1C637F Surface #14161A Highlight #F4F6F8 Secondary #596672 Accent #4B86A0

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

Vintage Leather Lead · 5 colors

Lead #1C637F Secondary #6F5216 Surface #E2DCC0 Accent #385244 Anchor #56233D

Lapis Lazuli 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 #F6F4EF Accent #1C637F Secondary #728791 Support #969386 Ink #16140F

Lapis Lazuli 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 Lapis Lazuli carrying the quiet middle.

Build a working theme in the generator →

Color Lab

How #1C637F 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 26/100

Cool

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

Softness 42/100

Moderate

Middle-weight — neither delicate nor heavy.

Depth 52/100

Moderate

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

Naturalness 1/100

Very low

Reads engineered rather than organic — synthetic, digital.

Vintage feel 51/100

Moderate

A faint retro warmth without tipping into sepia.

Luxury 58/100

Moderate

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

Brand distinctiveness 22/100

Low

Quiet and neutral — a supporting tone, not a signature.

UI accent fit 81/100

Very high

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

Surface fit 30/100

Low

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

Print safety 79/100

High

Reproduces faithfully in CMYK — safe for packaging and print.

Pairs with #1C637F

For UI

For branding

For interior

For fashion

People also use #1C637F with

Persian Green Midnight Blue Walnut Brown Platinum 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 6.7:1. Use

Subtle surface Use #CBE2EC for cards and hover fills. Tint 80

Avoid beside #1C417D — 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 #1C637F 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: #1C637F;
  --color-base-rgb: 28 99 127;
  --color-base-oklch: oklch(47.0% 0.081 229.0);
  --color-50: #F2FAFD;
  --color-100: #DDF1F8;
  --color-200: #BCE1F0;
  --color-300: #8EC9E1;
  --color-400: #64B0CE;
  --color-500: #4293B3;
  --color-600: #397289;
  --color-700: #2E5361;
  --color-800: #213740;
  --color-900: #162227;
  --color-on-base: #FFFFFF;
}

// tailwind.config.js
colors: {
  lapis-lazuli: {
    50: '#F2FAFD',
    100: '#DDF1F8',
    200: '#BCE1F0',
    300: '#8EC9E1',
    400: '#64B0CE',
    500: '#4293B3',
    600: '#397289',
    700: '#2E5361',
    800: '#213740',
    900: '#162227',
  },
}

$base: #1C637F;
$base-ink: #FFFFFF;
$base-50: #F2FAFD;
$base-100: #DDF1F8;
$base-200: #BCE1F0;
$base-300: #8EC9E1;
$base-400: #64B0CE;
$base-500: #4293B3;
$base-600: #397289;
$base-700: #2E5361;
$base-800: #213740;
$base-900: #162227;
$base-hover: #164E64;
$base-subtle: #AFD5E3;

{
    "color": {
        "base": {
            "value": "#1C637F",
            "type": "color"
        },
        "onBase": {
            "value": "#FFFFFF",
            "type": "color"
        },
        "scale": {
            "50": {
                "value": "#F2FAFD",
                "type": "color"
            },
            "100": {
                "value": "#DDF1F8",
                "type": "color"
            },
            "200": {
                "value": "#BCE1F0",
                "type": "color"
            },
            "300": {
                "value": "#8EC9E1",
                "type": "color"
            },
            "400": {
                "value": "#64B0CE",
                "type": "color"
            },
            "500": {
                "value": "#4293B3",
                "type": "color"
            },
            "600": {
                "value": "#397289",
                "type": "color"
            },
            "700": {
                "value": "#2E5361",
                "type": "color"
            },
            "800": {
                "value": "#213740",
                "type": "color"
            },
            "900": {
                "value": "#162227",
                "type": "color"
            }
        }
    }
}

Palettes built on #1C637F

Color Lab

Pairs with #1C637F

UI roles & guardrails

In real applications

Scales

Every model

Export