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blue · cool

#053da1

a dark, electric blue · cool · closest name: Dark Slate Blue

Token name suggestion: Shadow Cobalt

RGB
5, 61, 161
HSL
219°, 94%, 33%
CMYK
97, 62, 0, 37
Luminance
0.0594

#053da1 is a dark electric blue, 219° on the wheel and 95/100 on the cool side. Put white text on it (9.60:1). As text it scores 9.60:1 on white — safe at any size. Nearest name is Dark Slate Blue, nearest Tailwind family is indigo.

hsl(219 94% 33%)rgb(5 61 161)Base step 800AAA inkCool

At a glance

Every number on this page in one read: what #053da1 is made of, how bright it looks, and which way it leans.

Hex
#053da1
Hue
219°
blue
Saturation
94%
electric
Lightness
33%
dark
Brightness
63%
HSV value
Perceived
28%
weighted brightness
Luminance
0.0594
WCAG relative
Temperature
Cool
95/100 cool
Color family
Blue
Tone
Electric
Best ink
White
9.60:1
Closest name
Dark Slate Blue
ΔE2000 8.5
Chroma
63.5
LCH, 0–130ish
OKLCH L
0.399
perceptual lightness
Tailwind
indigo
500 · ΔE 18.7
Web-safe
#003399
nearest of 216
Where it sits
Hue219° of 360°
Saturation94%
Lightness33%
Saturation × lightness field

Left edge is grey, right edge is full chroma; top is white, bottom is black. The dot is #053da1.

Temperature
Warm ← → Cool95% cool

Reads cool. Warm and cool siblings keep the same lightness, so you can swap one in without redoing your contrast maths.

Luminance by channel
Red1%
Green56%
Blue43%

Green carries most of what the eye calls brightness — that is why WCAG weights it 0.7152.

Every format

HEX#053da1
HEX (8-digit)#053da1ff
RGBrgb(5, 61, 161)
RGBArgba(5, 61, 161, 1)
HSLhsl(219, 94%, 33%)
HSV / HSBhsv(218, 97%, 63%)
HWBhwb(219 2% 37%)
CMYKcmyk(97%, 62%, 0%, 37%)
LABlab(29.3 25.5 -58.2)
LCHlch(29.3 63.5 293.6)
OKLCHoklch(0.399 0.171 261.5)
XYZ (D65)xyz(8.16, 5.94, 34.43)
Decimal343457
Display P3color(display-p3 0.020 0.239 0.631)
Web-safe#003399

Copy-ready code

every platformclick to select
/* CSS */
color: #053da1;
background-color: #053da1;
/* CSS custom property */
--brand: #053da1;
/* Tailwind (arbitrary) */
class="text-[#053da1] bg-[#053da1]"
/* SCSS */
$brand: #053da1;
/* SwiftUI */
Color(red: 0.020, green: 0.239, blue: 0.631)
/* UIKit */
UIColor(red: 0.020, green: 0.239, blue: 0.631, alpha: 1)
/* Android XML */
<color name="brand">#053DA1</color>
/* Android Compose */
Color(0xFF053DA1)
/* Flutter */
Color(0xFF053DA1)
/* Python / OpenCV (BGR) */
(161, 61, 5)
/* Python / PIL (RGB) */
(5, 61, 161)
/* Java AWT */
new Color(5, 61, 161)
/* .NET */
Color.FromArgb(255, 5, 61, 161)
/* OpenGL / Unity (0–1) */
(0.0196f, 0.2392f, 0.6314f, 1f)
/* LaTeX */
\definecolor{brand}{RGB}{5,61,161}
modern cssclick to select
/* mix without leaving CSS */
background: color-mix(in oklab, #053da1 85%, white);
border-color: color-mix(in oklab, #053da1 40%, transparent);
/* theme-aware in one line */
color: light-dark(#042F7C, #D3DCEE);
/* relative colour syntax */
--hover: hsl(from #053da1 h s calc(l - 7));

Design tokens

The same ramp in the four formats a team actually needs. Paste one and the whole palette lands with it.

css custom propertiesclick to select
:root {
  --brand-50: #F2F6FD;
  --brand-100: #E4ECFB;
  --brand-200: #C2D6FA;
  --brand-300: #92B8FC;
  --brand-400: #5C94FA;
  --brand-500: #2571F8;
  --brand-600: #075AED;
  --brand-700: #064BC6;
  --brand-800: #053da1;
  --brand-900: #082E72;
  --brand-950: #051D47;
  --brand: #053da1;
  --brand-ink: #ffffff;
  --brand-surface: #F4F6FA;
  --brand-border: #C0D0ED;
  --brand-hover: #04307E;
  --brand-pressed: #03235C;
}
@media (prefers-color-scheme: dark) {
  :root {
    --brand-surface: #141A24;
    --brand-ink: #D3DCEE;
  }
}
tailwind.config.jsclick to select
theme: {
  extend: {
    colors: {
      brand: {
        50: '#F2F6FD',
        100: '#E4ECFB',
        200: '#C2D6FA',
        300: '#92B8FC',
        400: '#5C94FA',
        500: '#2571F8',
        600: '#075AED',
        700: '#064BC6',
        800: '#053da1',
        900: '#082E72',
        950: '#051D47',
        DEFAULT: '#053da1',
      },
    },
  },
}
scss mapclick to select
$brand: (
  '50': #F2F6FD,
  '100': #E4ECFB,
  '200': #C2D6FA,
  '300': #92B8FC,
  '400': #5C94FA,
  '500': #2571F8,
  '600': #075AED,
  '700': #064BC6,
  '800': #053da1,
  '900': #082E72,
  '950': #051D47,
);
$brand-base: #053da1;
$brand-ink: #ffffff;

@function brand($step) { @return map-get($brand, $step); }
w3c design tokens (json)click to select
{
  "color": {
    "brand": {
      "50": { "$value": "#F2F6FD", "$type": "color" },
      "100": { "$value": "#E4ECFB", "$type": "color" },
      "200": { "$value": "#C2D6FA", "$type": "color" },
      "300": { "$value": "#92B8FC", "$type": "color" },
      "400": { "$value": "#5C94FA", "$type": "color" },
      "500": { "$value": "#2571F8", "$type": "color" },
      "600": { "$value": "#075AED", "$type": "color" },
      "700": { "$value": "#064BC6", "$type": "color" },
      "800": { "$value": "#053da1", "$type": "color" },
      "900": { "$value": "#082E72", "$type": "color" },
      "950": { "$value": "#051D47", "$type": "color" }
    },
    "brandInk": { "$value": "#ffffff", "$type": "color" }
  }
}

Best text color

Only one of black and white can be right. This is the one, with the number that proves it.

Readable at a glance#ffffff on #053da1 · 9.60:1
Use #ffffffAAA at every size.
Aa
12px
Aa
16px
Aa
24px
Aa
White text · 9.60:1 · recommended
AA pass · AA large pass · AAA pass
Aa
Black text · 2.19:1
AA fail · AA large fail · AAA fail
Reading the other direction: #053da1 as text scores 9.60:1 on white and 2.19:1 on black.
Best tinted ink on it, if plain black or white feels flat: #E6EFFE at 8.29:1.

Make it accessible

A contrast checker tells you that you failed. This tells you what to ship instead — same hue, same saturation, lightness moved only as far as WCAG demands.

The quick fox
#053da1 · 9.60:1
AA on whitealready passes
#053da1
The quick fox
#053da1 · 9.60:1
AAA on whitealready passes
#053da1
The quick fox
#1E6CF8 · 4.56:1
AA on black+22% L
#1E6CF8
The quick fox
#5E96FA · 7.22:1
AAA on black+35% L
#5E96FA

Large text — 24px regular or 18.66px bold and above — only needs 3:1, so #053DA1 is enough for headings on white. Non-text elements such as icons, chart strokes and focus rings also sit at 3:1 under WCAG 2.2 (1.4.11).

Accessibility — WCAG contrast

Aa
#053da1 on white: 9.60:1
AA ✓ pass · AA-large · AAA
Aa
#053da1 on black: 2.19:1
AA ✗ fail · AA-large · AAA
Against the neutral ladder

Contrast is symmetric, so each row covers both directions: #053da1 as text on that neutral, and that neutral as text on #053da1.

NeutralRatioBoth directions
White9.60:1AaAa
Slate 509.17:1AaAa
Slate 1008.76:1AaAa
Slate 2007.78:1AaAa
Slate 3006.46:1AaAa
Slate 4003.74:1AaAa
Slate 5002.02:1AaAa
Slate 6001.27:1AaAa
Slate 7001.08:1AaAa
Slate 8001.52:1AaAa
Slate 9001.86:1AaAa
Black2.19:1AaAa
Colour vision deficiency
true color
protanopia · #004CA4
deuteranopia · #003E9F
tritanopia · #005769

Roughly one man in twelve has some form of colour vision deficiency. If any of the three panels above is hard to tell apart from a neighbouring colour in your palette, add a shape, an icon or a label so the meaning does not rest on hue alone.

Color scale — 50 to 950

A Tailwind-shaped ramp built around this exact hex. #053da1 is pinned to step 800; the rest hold its hue and let saturation ease off at the extremes so the pale end never turns neon.

#F2F6FD
#E4ECFB
#C2D6FA
#92B8FC
#5C94FA
#2571F8
#075AED
#064BC6
#053da1
#082E72
#051D47
Base = 800Lightest = 50 · #F2F6FDDarkest = 950 · #051D47Text step on white = 600
Perceptual ramp — OKLCH

The same eleven steps expressed in OKLCH, where equal lightness numbers actually look equally spaced. HSL ramps go muddy in the yellows and washed out in the blues; this one does not. Modern browsers render it natively — the hex ramp above is the fallback.

50100200300400500600700800900950
oklch tokensclick to select
:root {
  --brand-50: oklch(0.97 0.043 261.5);
  --brand-100: oklch(0.94 0.068 261.5);
  --brand-200: oklch(0.88 0.102 261.5);
  --brand-300: oklch(0.80 0.133 261.5);
  --brand-400: oklch(0.72 0.157 261.5);
  --brand-500: oklch(0.64 0.171 261.5);
  --brand-600: oklch(0.56 0.171 261.5);
  --brand-700: oklch(0.48 0.160 261.5);
  --brand-800: oklch(0.40 0.143 261.5);
  --brand-900: oklch(0.32 0.119 261.5);
  --brand-950: oklch(0.24 0.094 261.5);
}

Colors that work with #053da1

Not a palette — a role sheet. Each swatch answers one question you will hit while building the component.

Text on it#ffffff
White wins here
Surface#F4F6FA
Tinted page background
Border#C0D0ED
Hairlines and dividers
Muted text#4B679B
Captions on the surface
Accent#A44102
Second voice, not a rival
Dark variant#042F7C
Hover, pressed, headers
Light variant#E6EFFE
Selected rows, tints
Dark surface#141A24
Dark-mode background
Hover#04307E
One step down in lightness
Pressed#03235C
Two steps down
Disabled#7184A5
Chroma pulled out
Focus ring#0043BA
Offset from the fill so it reads
Light mode
Everything in its place

Surface, border, heading and body all derive from this one hue, so the screen stays coherent without a second palette.

Primary actionSecondaryBadge
Dark mode
Same hue, inverted

Lightness flips, hue holds. The accent stays the anchor in both themes.

Primary actionSecondaryAccent

In real components

The same eight roles, wired into the interface patterns you will actually build with them. Every state below is a computed value, not a mock-up.

Buttons and states
Save changesHoverPressedDisabled
OutlineSubtleLinkFocused
Form field
you@company.com

Focus ring uses the light variant so the field still reads as one shape.

Send me product updates
Notice
Your export is ready

The file stays available for seven days. Download it before it expires.

NewBetaDraft
Data
Storage used68%
Acme LtdActive
NorthwindTrial
GlobexActive

How to use #053da1

Derived from its contrast, chroma and lightness — not from taste.

Works well for
  • Body text and links on white
  • Primary buttons and calls to action
  • Focus rings, active and selected states
  • Headers, footers and dark-mode surfaces
  • Brand accents, badges and data highlights
Use with care
  • Text on black or near-black surfaces
  • Full-page backgrounds — tiring over long sessions
  • Black text placed on it
  • Pairing with a same-lightness hue — edges vibrate
Minimum size as text on white
Any size
Safe as a fill behind white type
Yes
Safe as a 1px border on white
Yes

Meaning and mood

What a colour in this family tends to signal, and how this particular chroma and lightness change the reading.

trustedcalmcompetentcorporate

The default of institutions for a reason: blue is read as stable and safe across nearly every culture that has been surveyed.

At this chroma the association is amplified — it will dominate anything placed beside it, so give it space and use it sparingly. The low lightness adds weight and formality.

Worth knowing

It is also the most crowded hue on the web. Distinctiveness has to come from your other choices.

Reads as
  • FormalityHigh
  • EnergyHigh
  • Weight68/100
  • TemperatureCool
  • ApproachabilityReserved

Colour associations are cultural and vary by market. Treat these as a starting point for a conversation with your audience, not a finding about them.

Similar colors

One move away from this hex in each direction. Every swatch is its own page.

Color relationships

The wheel positions with their names attached, so you can grab the one you actually need.

Complementary#A16905
Analogous left#058BA1
Analogous right#1B05A1
Split-complement 1#A11B05
Split-complement 2#8BA105
Triadic 1#A1053D
Triadic 2#3DA105
Tetradic#A1058B
On the wheel
Base+30°−30°+120°+240°+180°219°

#053da1 sits at 219°. Every dot is a harmony position and links to its own page in the table alongside.

RGB percentages

Red2.0%
Green23.9%
Blue63.1%
R · 0–255
5
0x05
G · 0–255
61
0x3d
B · 0–255
161
0xa1

CMYK percentages

Cyan96.9%
Magenta62.1%
Yellow0.0%
Key (black)36.9%

Total ink coverage is 196%. Most commercial presses cap around 300% — above that, sheets stop drying properly.

Color previews

#053da1 text on a black background

contrast 2.19:1

Card sample

#053da1 text on a white background

contrast 9.60:1

Card sample

#053da1 on grey

8.76:1

#053da1 on its own surface

8.87:1

#053da1 on its dark surface

1.82:1

CSS3 live lab

Text font color

The quick brown fox

color: #053da1;
Background color
Panel with #053da1 background
background-color: #053da1;
Text shadow — hex

Glowing headline

text-shadow: 2px 2px 8px #053da1;
Text shadow — RGB

Soft neon halo

text-shadow: 0 0 14px rgba(5, 61, 161, 0.45);
Div box shadow
Elevated card
box-shadow: 0 12px 32px -8px rgba(5, 61, 161, 0.45);
Border & gradient
Gradient panel
border: 3px solid #053da1;
background: linear-gradient(135deg, #053da1, #3505A1);
Gradient text

Gradient headline

background: linear-gradient(90deg, #053da1, #5C05A1);
-webkit-background-clip: text;
color: transparent;
Focus ring
Focused control
outline: 2px solid #053da1;
outline-offset: 3px;
Underline & caret

Marked up text

text-decoration-color: #053da1;
caret-color: #053da1;
Left rule
Pull quote or callout
border-left: 4px solid #053da1;
Ring + tint
Selected chip
background: #E6EFFE;
box-shadow: inset 0 0 0 2px #053da1;
Conic badge
68%
background: conic-gradient(#053da1 68%, #e2e8f0 0);

Transparency

What each alpha value actually composites to. The top row is #053da1 over white; the bottom row is the same alpha over a checkerboard, so you can see what survives on a photo or a video.

Bottom row of hexes is the flattened result over white — use those when a design tool refuses transparency, or when you need a solid fallback.

alpha in every syntaxclick to select
rgba(5, 61, 161, 0.5)
rgb(5 61 161 / 50%)
#053da180
hsl(219 94% 33% / 50%)
color-mix(in srgb, #053da1 50%, transparent)
Alpha8-digit hexFlat on white
10%#053da11a#E6ECF6
20%#053da133#CDD8EC
40%#053da166#9BB1D9
60%#053da199#698BC7
80%#053da1cc#3764B4

Gradients from #053da1

Six recipes, each built from this hex and shown with the exact CSS that produced it.

Elevation
Same hue, three lightnesses — safe anywhere
background: linear-gradient(135deg, #0753DC, #053da1 45%, #042F7C);
Duotone
A short hue run reads richer than a flat fill
background: linear-gradient(120deg, #053da1, #360483);
Complement sweep
Loud — keep it behind large type only
background: linear-gradient(90deg, #053da1, #A16905);
Spotlight
Hero panels and app headers
background: radial-gradient(120% 120% at 20% 0%, #0A5FF7 0%, #053da1 45%, #042F7C 100%);
Soft wash
Section backgrounds that stay readable
background: linear-gradient(180deg, #F4F6FA, #ffffff);
Mesh
Ambient background, no image weight
background: radial-gradient(60% 60% at 15% 20%, #07C6D2 0%, transparent 60%), radial-gradient(55% 55% at 85% 15%, #2F06BE 0%, transparent 60%), radial-gradient(70% 70% at 50% 95%, #042F7C 0%, transparent 65%), #053da1;

Monochromatic scale

Palettes built from #053da1

Shades — darker

Tints — lighter

Tones — desaturated

Color harmonies

Nearest named colors

Ranked with CIEDE2000 across all 139 CSS keywords. Under ΔE 2 the eye stops telling them apart; over ΔE 10 they are plainly different colors.

#053da1 in the real world

Where a color in this family tends to land, and the interface roles it is usually asked to play.

Industries
TechnologyFinanceHealthcareEnterprise SaaS
Common UI roles
ButtonsLinksFocus statesCharts
Print note

Sits outside most CMYK gamuts — expect a duller press result, or specify a spot ink.

On screens

Holds up across typical panel gamma. Still worth checking on an uncalibrated laptop, where mid-tones shift most.

In dark mode

Too dim on dark surfaces at 2.19:1 — lift it to #1E6CF8 for body text, or reserve it for fills.

Explore nearby colors

Small, deliberate steps away from this hex — useful when you are hunting for the version of a colour that finally feels right.

#053da1, answered

What color is #053da1?

#053da1 is a dark electric blue, closest to Dark Slate Blue (ΔE2000 8.5). It sits at 219° on the hue wheel with 94% saturation and 33% lightness, which reads as cool.

What is the RGB value of #053da1?

rgb(5, 61, 161) — 5 red, 61 green and 161 blue out of 255, or 2% / 23.9% / 63.1% by channel.

What is #053da1 in HSL and HSV?

hsl(219, 94%, 33%) and hsv(218, 97%, 63%). HSL is what CSS takes; HSV is what your design tool's picker shows, which is why the saturation numbers rarely match.

Is #053da1 a light or a dark color?

It is a dark color. Relative luminance is 0.0594 and perceived brightness is 28%, so white text on it reaches 9.60:1.

Should I use black or white text on #053da1?

White. It scores 9.60:1 against #053da1, versus 2.19:1 for black — AAA at any size.

Is #053da1 accessible on a white background?

#053da1 on white scores 9.60:1, which clears AAA at every size.

What is the complementary color of #053da1?

#A16905 sits directly opposite on the wheel. Softer options are the split-complements #A11B05 and #8BA105, which give the same contrast with far less vibration.

What colors go well with #053da1?

For interface work: #F4F6FA as the surface, #C0D0ED for borders, #4B679B for secondary text, #A44102 as an accent and #042F7C for hover and pressed states. For a palette, the analogous pair #058BA1 and #1B05A1 stays calm, while #A16905 is the loudest partner.

What is #053da1 in CMYK for printing?

cmyk(97%, 62%, 0%, 37%). This is a screen-to-ink approximation — a color this saturated sits outside most CMYK gamuts and will print duller than it looks here.

Is #053da1 warm or cool?

Cool — it scores 95 on a scale where 0 is the warmest orange and 100 the coolest azure. Nudged warmer it becomes #0605A1; nudged cooler, #033C89.

Which Tailwind color is closest to #053da1?

The indigo family — its 500 step is #6366f1, ΔE2000 18.7 away. That is a visible difference, so define #053da1 as a custom token rather than reaching for the built-in.

How do I use #053da1 in Tailwind CSS?

Inline it as an arbitrary value with bg-[#053da1] or text-[#053da1], or register the whole ramp under theme.extend.colors.brand so you get bg-brand-500 and friends. The generated 50–950 scale on this page is ready to paste into your config.

What is #053da1 with 50% opacity?

rgba(5, 61, 161, 0.5), or #053da180 in eight-digit hex. Over white that composites to #829ED0; over black, #031F51.

Is #053da1 a web-safe color?

No. The nearest web-safe colour is #003399, ΔE2000 3.2 away. The palette only matters for legacy displays and some email clients now.

What does the color #053da1 mean?

As a blue, it reads trusted, calm, competent. The default of institutions for a reason: blue is read as stable and safe across nearly every culture that has been surveyed. At this chroma the effect is amplified — it will dominate whatever sits beside it.

What gradient works with #053da1?

The safest is same-hue elevation: linear-gradient(135deg, #0753DC, #053da1 45%, #042F7C). For more colour, a short hue run to #360483 keeps it rich without turning muddy.

Work with #053da1 in the Color Lab

Every tool opens with this colour already loaded.

Every value on this page is computed from #053da1 at request time — conversions, contrast ratios and ΔE distances are calculated, never looked up.