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blue · cool

#4f4dab

a balanced, soft blue · cool · closest name: Dark Slate Blue

Token name suggestion: Atlas Cobalt

RGB
79, 77, 171
HSL
241°, 38%, 49%
CMYK
54, 55, 0, 33
Luminance
0.0991

#4f4dab is a balanced soft blue, 241° on the wheel and 83/100 on the cool side. Put white text on it (7.04:1). As text it scores 7.04:1 on white — safe at any size. Nearest name is Dark Slate Blue, nearest Tailwind family is indigo.

hsl(241 38% 49%)rgb(79 77 171)Base step 600AAA inkCool

At a glance

Every number on this page in one read: what #4f4dab is made of, how bright it looks, and which way it leans.

Hex
#4f4dab
Hue
241°
blue
Saturation
38%
soft
Lightness
49%
balanced
Brightness
67%
HSV value
Perceived
37%
weighted brightness
Luminance
0.0991
WCAG relative
Temperature
Cool
83/100 cool
Color family
Blue
Tone
Soft
Best ink
White
7.04:1
Closest name
Dark Slate Blue
ΔE2000 6.6
Chroma
57.5
LCH, 0–130ish
OKLCH L
0.474
perceptual lightness
Tailwind
indigo
500 · ΔE 12.9
Web-safe
#666699
nearest of 216
Where it sits
Hue241° of 360°
Saturation38%
Lightness49%
Saturation × lightness field

Left edge is grey, right edge is full chroma; top is white, bottom is black. The dot is #4f4dab.

Temperature
Warm ← → Cool83% 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
Red17%
Green54%
Blue30%

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

Every format

HEX#4f4dab
HEX (8-digit)#4f4dabff
RGBrgb(79, 77, 171)
RGBArgba(79, 77, 171, 1)
HSLhsl(241, 38%, 49%)
HSV / HSBhsv(241, 55%, 67%)
HWBhwb(241 30% 33%)
CMYKcmyk(54%, 55%, 0%, 33%)
LABlab(37.7 27.7 -50.4)
LCHlch(37.7 57.5 298.8)
OKLCHoklch(0.474 0.146 280.2)
XYZ (D65)xyz(13.23, 9.91, 39.74)
Decimal5197227
Display P3color(display-p3 0.310 0.302 0.671)
Web-safe#666699

Copy-ready code

every platformclick to select
/* CSS */
color: #4f4dab;
background-color: #4f4dab;
/* CSS custom property */
--brand: #4f4dab;
/* Tailwind (arbitrary) */
class="text-[#4f4dab] bg-[#4f4dab]"
/* SCSS */
$brand: #4f4dab;
/* SwiftUI */
Color(red: 0.310, green: 0.302, blue: 0.671)
/* UIKit */
UIColor(red: 0.310, green: 0.302, blue: 0.671, alpha: 1)
/* Android XML */
<color name="brand">#4F4DAB</color>
/* Android Compose */
Color(0xFF4F4DAB)
/* Flutter */
Color(0xFF4F4DAB)
/* Python / OpenCV (BGR) */
(171, 77, 79)
/* Python / PIL (RGB) */
(79, 77, 171)
/* Java AWT */
new Color(79, 77, 171)
/* .NET */
Color.FromArgb(255, 79, 77, 171)
/* OpenGL / Unity (0–1) */
(0.3098f, 0.3020f, 0.6706f, 1f)
/* LaTeX */
\definecolor{brand}{RGB}{79,77,171}
modern cssclick to select
/* mix without leaving CSS */
background: color-mix(in oklab, #4f4dab 85%, white);
border-color: color-mix(in oklab, #4f4dab 40%, transparent);
/* theme-aware in one line */
color: light-dark(#292858, #D5D5EC);
/* relative colour syntax */
--hover: hsl(from #4f4dab 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: #F5F5FA;
  --brand-100: #EBEBF4;
  --brand-200: #D3D3E9;
  --brand-300: #B3B2DC;
  --brand-400: #8C8BCB;
  --brand-500: #6664B9;
  --brand-600: #4f4dab;
  --brand-700: #413F8D;
  --brand-800: #343371;
  --brand-900: #292853;
  --brand-950: #191934;
  --brand: #4f4dab;
  --brand-ink: #ffffff;
  --brand-surface: #F5F4FA;
  --brand-border: #C7C7E6;
  --brand-hover: #444292;
  --brand-pressed: #38377A;
}
@media (prefers-color-scheme: dark) {
  :root {
    --brand-surface: #141424;
    --brand-ink: #D5D5EC;
  }
}
tailwind.config.jsclick to select
theme: {
  extend: {
    colors: {
      brand: {
        50: '#F5F5FA',
        100: '#EBEBF4',
        200: '#D3D3E9',
        300: '#B3B2DC',
        400: '#8C8BCB',
        500: '#6664B9',
        600: '#4f4dab',
        700: '#413F8D',
        800: '#343371',
        900: '#292853',
        950: '#191934',
        DEFAULT: '#4f4dab',
      },
    },
  },
}
scss mapclick to select
$brand: (
  '50': #F5F5FA,
  '100': #EBEBF4,
  '200': #D3D3E9,
  '300': #B3B2DC,
  '400': #8C8BCB,
  '500': #6664B9,
  '600': #4f4dab,
  '700': #413F8D,
  '800': #343371,
  '900': #292853,
  '950': #191934,
);
$brand-base: #4f4dab;
$brand-ink: #ffffff;

@function brand($step) { @return map-get($brand, $step); }
w3c design tokens (json)click to select
{
  "color": {
    "brand": {
      "50": { "$value": "#F5F5FA", "$type": "color" },
      "100": { "$value": "#EBEBF4", "$type": "color" },
      "200": { "$value": "#D3D3E9", "$type": "color" },
      "300": { "$value": "#B3B2DC", "$type": "color" },
      "400": { "$value": "#8C8BCB", "$type": "color" },
      "500": { "$value": "#6664B9", "$type": "color" },
      "600": { "$value": "#4f4dab", "$type": "color" },
      "700": { "$value": "#413F8D", "$type": "color" },
      "800": { "$value": "#343371", "$type": "color" },
      "900": { "$value": "#292853", "$type": "color" },
      "950": { "$value": "#191934", "$type": "color" }
    },
    "brandInk": { "$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 #4f4dab · 7.04:1
Use #ffffffAAA at every size.
Aa
12px
Aa
16px
Aa
24px
Aa
White text · 7.04:1 · recommended
AA pass · AA large pass · AAA pass
Aa
Black text · 2.98:1
AA fail · AA large fail · AAA fail
Reading the other direction: #4f4dab as text scores 7.04:1 on white and 2.98:1 on black.
Best tinted ink on it, if plain black or white feels flat: #EEEDF7 at 6.07:1.

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
#4f4dab · 7.04:1
AA on whitealready passes
#4f4dab
The quick fox
#4f4dab · 7.04:1
AAA on whitealready passes
#4f4dab
The quick fox
#6F6DBD · 4.60:1
AA on black+10% L
#6F6DBD
The quick fox
#9291CD · 7.15:1
AAA on black+20% L
#9291CD

Large text — 24px regular or 18.66px bold and above — only needs 3:1, so #4F4DAB 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
#4f4dab on white: 7.04:1
AA ✓ pass · AA-large · AAA
Aa
#4f4dab on black: 2.98:1
AA ✗ fail · AA-large · AAA
Against the neutral ladder

Contrast is symmetric, so each row covers both directions: #4f4dab as text on that neutral, and that neutral as text on #4f4dab.

NeutralRatioBoth directions
White7.04:1AaAa
Slate 506.73:1AaAa
Slate 1006.43:1AaAa
Slate 2005.71:1AaAa
Slate 3004.74:1AaAa
Slate 4002.75:1AaAa
Slate 5001.48:1AaAa
Slate 6001.08:1AaAa
Slate 7001.47:1AaAa
Slate 8002.08:1AaAa
Slate 9002.54:1AaAa
Black2.98:1AaAa
Colour vision deficiency
true color
protanopia · #135CAE
deuteranopia · #0055A9
tritanopia · #266274

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. #4f4dab is pinned to step 600; the rest hold its hue and let saturation ease off at the extremes so the pale end never turns neon.

#F5F5FA
#EBEBF4
#D3D3E9
#B3B2DC
#8C8BCB
#6664B9
#4f4dab
#413F8D
#343371
#292853
#191934
Base = 600Lightest = 50 · #F5F5FADarkest = 950 · #191934Text step on white = 500
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 0.037 280.2);
  --brand-100: oklch(0.94 0.059 280.2);
  --brand-200: oklch(0.88 0.088 280.2);
  --brand-300: oklch(0.80 0.114 280.2);
  --brand-400: oklch(0.72 0.135 280.2);
  --brand-500: oklch(0.64 0.146 280.2);
  --brand-600: oklch(0.56 0.146 280.2);
  --brand-700: oklch(0.48 0.138 280.2);
  --brand-800: oklch(0.40 0.123 280.2);
  --brand-900: oklch(0.32 0.102 280.2);
  --brand-950: oklch(0.24 0.081 280.2);
}

Colors that work with #4f4dab

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#F5F4FA
Tinted page background
Border#C7C7E6
Hairlines and dividers
Muted text#4C4B9B
Captions on the surface
Accent#917D3B
Second voice, not a rival
Dark variant#292858
Hover, pressed, headers
Light variant#EEEDF7
Selected rows, tints
Dark surface#141424
Dark-mode background
Hover#444292
One step down in lightness
Pressed#38377A
Two steps down
Disabled#A4A4C5
Chroma pulled out
Focus ring#4F4CC0
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 #4f4dab

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

Works well for
  • Body text and links on white
  • Charts, tags and secondary surfaces
  • Brand accents, badges and data highlights
  • Chart series and data categories
Use with care
  • Text on black or near-black surfaces
  • 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.

The muted chroma softens the association — it reads considered rather than loud, which suits long-form and data-heavy screens. The mid lightness keeps it versatile in both themes.

Worth knowing

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

Reads as
  • FormalityMedium
  • EnergyMedium
  • Weight51/100
  • 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#A9AB4D
Analogous left#4D7AAB
Analogous right#7E4DAB
Split-complement 1#AB7E4D
Split-complement 2#7AAB4D
Triadic 1#AB4F4D
Triadic 2#4DAB4F
Tetradic#AB4D7A
On the wheel
Base+30°−30°+120°+240°+180°241°

#4f4dab sits at 241°. Every dot is a harmony position and links to its own page in the table alongside.

RGB percentages

Red31.0%
Green30.2%
Blue67.1%
R · 0–255
79
0x4f
G · 0–255
77
0x4d
B · 0–255
171
0xab

CMYK percentages

Cyan53.8%
Magenta55.0%
Yellow0.0%
Key (black)32.9%

Total ink coverage is 142%. Most commercial presses cap around 300% — above that, sheets stop drying properly.

Color previews

#4f4dab text on a black background

contrast 2.98:1

Card sample

#4f4dab text on a white background

contrast 7.04:1

Card sample

#4f4dab on grey

6.43:1

#4f4dab on its own surface

6.44:1

#4f4dab on its dark surface

2.58:1

CSS3 live lab

Text font color

The quick brown fox

color: #4f4dab;
Background color
Panel with #4f4dab background
background-color: #4f4dab;
Text shadow — hex

Glowing headline

text-shadow: 2px 2px 8px #4f4dab;
Text shadow — RGB

Soft neon halo

text-shadow: 0 0 14px rgba(79, 77, 171, 0.45);
Div box shadow
Elevated card
box-shadow: 0 12px 32px -8px rgba(79, 77, 171, 0.45);
Border & gradient
Gradient panel
border: 3px solid #4f4dab;
background: linear-gradient(135deg, #4f4dab, #8E4DAB);
Gradient text

Gradient headline

background: linear-gradient(90deg, #4f4dab, #A54DAB);
-webkit-background-clip: text;
color: transparent;
Focus ring
Focused control
outline: 2px solid #4f4dab;
outline-offset: 3px;
Underline & caret

Marked up text

text-decoration-color: #4f4dab;
caret-color: #4f4dab;
Left rule
Pull quote or callout
border-left: 4px solid #4f4dab;
Ring + tint
Selected chip
background: #EEEDF7;
box-shadow: inset 0 0 0 2px #4f4dab;
Conic badge
68%
background: conic-gradient(#4f4dab 68%, #e2e8f0 0);

Transparency

What each alpha value actually composites to. The top row is #4f4dab 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(79, 77, 171, 0.5)
rgb(79 77 171 / 50%)
#4f4dab80
hsl(241 38% 49% / 50%)
color-mix(in srgb, #4f4dab 50%, transparent)
Alpha8-digit hexFlat on white
10%#4f4dab1a#EDEDF7
20%#4f4dab33#DCDBEE
40%#4f4dab66#B9B8DD
60%#4f4dab99#9594CD
80%#4f4dabcc#7271BC

Gradients from #4f4dab

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, #7674C1, #4f4dab 45%, #292858);
Duotone
A short hue run reads richer than a flat fill
background: linear-gradient(120deg, #4f4dab, #834396);
Complement sweep
Loud — keep it behind large type only
background: linear-gradient(90deg, #4f4dab, #A9AB4D);
Spotlight
Hero panels and app headers
background: radial-gradient(120% 120% at 20% 0%, #8B8ACA 0%, #4f4dab 45%, #292858 100%);
Soft wash
Section backgrounds that stay readable
background: linear-gradient(180deg, #F5F4FA, #ffffff);
Mesh
Ambient background, no image weight
background: radial-gradient(60% 60% at 15% 20%, #6D9ABD 0%, transparent 60%), radial-gradient(55% 55% at 85% 15%, #945FB7 0%, transparent 60%), radial-gradient(70% 70% at 50% 95%, #292858 0%, transparent 65%), #4f4dab;

Monochromatic scale

Palettes built from #4f4dab

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.

#4f4dab 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

Converts to four-color process without much drama. Proof it anyway.

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 2.98:1 — lift it to #6F6DBD 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.

#4f4dab, answered

What color is #4f4dab?

#4f4dab is a balanced soft blue, closest to Dark Slate Blue (ΔE2000 6.6). It sits at 241° on the hue wheel with 38% saturation and 49% lightness, which reads as cool.

What is the RGB value of #4f4dab?

rgb(79, 77, 171) — 79 red, 77 green and 171 blue out of 255, or 31% / 30.2% / 67.1% by channel.

What is #4f4dab in HSL and HSV?

hsl(241, 38%, 49%) and hsv(241, 55%, 67%). HSL is what CSS takes; HSV is what your design tool's picker shows, which is why the saturation numbers rarely match.

Is #4f4dab a light or a dark color?

It is a dark color. Relative luminance is 0.0991 and perceived brightness is 37%, so white text on it reaches 7.04:1.

Should I use black or white text on #4f4dab?

White. It scores 7.04:1 against #4f4dab, versus 2.98:1 for black — AAA at any size.

Is #4f4dab accessible on a white background?

#4f4dab on white scores 7.04:1, which clears AAA at every size.

What is the complementary color of #4f4dab?

#A9AB4D sits directly opposite on the wheel. Softer options are the split-complements #AB7E4D and #7AAB4D, which give the same contrast with far less vibration.

What colors go well with #4f4dab?

For interface work: #F5F4FA as the surface, #C7C7E6 for borders, #4C4B9B for secondary text, #917D3B as an accent and #292858 for hover and pressed states. For a palette, the analogous pair #4D7AAB and #7E4DAB stays calm, while #A9AB4D is the loudest partner.

What is #4f4dab in CMYK for printing?

cmyk(54%, 55%, 0%, 33%). This is a screen-to-ink approximation — ask your printer for a proof before committing to a run.

Is #4f4dab warm or cool?

Cool — it scores 83 on a scale where 0 is the warmest orange and 100 the coolest azure. Nudged warmer it becomes #714DAB; nudged cooler, #4A69AD.

Which Tailwind color is closest to #4f4dab?

The indigo family — its 500 step is #6366f1, ΔE2000 12.9 away. That is a visible difference, so define #4f4dab as a custom token rather than reaching for the built-in.

How do I use #4f4dab in Tailwind CSS?

Inline it as an arbitrary value with bg-[#4f4dab] or text-[#4f4dab], 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 #4f4dab with 50% opacity?

rgba(79, 77, 171, 0.5), or #4f4dab80 in eight-digit hex. Over white that composites to #A7A6D5; over black, #282756.

Is #4f4dab a web-safe color?

No. The nearest web-safe colour is #666699, ΔE2000 10.6 away. The palette only matters for legacy displays and some email clients now.

What does the color #4f4dab 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 moderate chroma the association is present but not shouted.

What gradient works with #4f4dab?

The safest is same-hue elevation: linear-gradient(135deg, #7674C1, #4f4dab 45%, #292858). For more colour, a short hue run to #834396 keeps it rich without turning muddy.

Work with #4f4dab in the Color Lab

Every tool opens with this colour already loaded.

Every value on this page is computed from #4f4dab at request time — conversions, contrast ratios and ΔE distances are calculated, never looked up.