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blue · cool

#999df2

a light, electric blue · cool · closest name: Cornflower Blue

Token name suggestion: Drift Cobalt

RGB
153, 157, 242
HSL
237°, 77%, 78%
CMYK
37, 35, 0, 5
Luminance
0.3730

#999df2 is a light electric blue, 237° on the wheel and 85/100 on the cool side. Put black text on it (8.46:1). As text it scores 2.48:1 on white — use #5E65EB instead. Nearest name is Cornflower Blue, nearest Tailwind family is blue.

hsl(237 77% 78%)rgb(153 157 242)Base step 300AAA inkCool

At a glance

Every number on this page in one read: what #999df2 is made of, how bright it looks, and which way it leans.

Hex
#999df2
Hue
237°
blue
Saturation
77%
electric
Lightness
78%
light
Brightness
95%
HSV value
Perceived
66%
weighted brightness
Luminance
0.3730
WCAG relative
Temperature
Cool
85/100 cool
Color family
Blue
Tone
Electric
Best ink
Black
8.46:1
Closest name
Cornflower Blue
ΔE2000 10.3
Chroma
46.9
LCH, 0–130ish
OKLCH L
0.727
perceptual lightness
Tailwind
blue
500 · ΔE 14.8
Web-safe
#9999FF
nearest of 216
Where it sits
Hue237° of 360°
Saturation77%
Lightness78%
Saturation × lightness field

Left edge is grey, right edge is full chroma; top is white, bottom is black. The dot is #999df2.

Temperature
Warm ← → Cool85% 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
Red18%
Green65%
Blue17%

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

Every format

HEX#999df2
HEX (8-digit)#999df2ff
RGBrgb(153, 157, 242)
RGBArgba(153, 157, 242, 1)
HSLhsl(237, 77%, 78%)
HSV / HSBhsv(237, 37%, 95%)
HWBhwb(237 60% 5%)
CMYKcmyk(37%, 35%, 0%, 5%)
LABlab(67.5 18.6 -43.0)
LCHlch(67.5 46.9 293.3)
OKLCHoklch(0.727 0.123 280.8)
XYZ (D65)xyz(41.22, 37.30, 89.01)
Decimal10067442
Display P3color(display-p3 0.600 0.616 0.949)
Web-safe#9999FF

Copy-ready code

every platformclick to select
/* CSS */
color: #999df2;
background-color: #999df2;
/* CSS custom property */
--brand: #999df2;
/* Tailwind (arbitrary) */
class="text-[#999df2] bg-[#999df2]"
/* SCSS */
$brand: #999df2;
/* SwiftUI */
Color(red: 0.600, green: 0.616, blue: 0.949)
/* UIKit */
UIColor(red: 0.600, green: 0.616, blue: 0.949, alpha: 1)
/* Android XML */
<color name="brand">#999DF2</color>
/* Android Compose */
Color(0xFF999DF2)
/* Flutter */
Color(0xFF999DF2)
/* Python / OpenCV (BGR) */
(242, 157, 153)
/* Python / PIL (RGB) */
(153, 157, 242)
/* Java AWT */
new Color(153, 157, 242)
/* .NET */
Color.FromArgb(255, 153, 157, 242)
/* OpenGL / Unity (0–1) */
(0.6000f, 0.6157f, 0.9490f, 1f)
/* LaTeX */
\definecolor{brand}{RGB}{153,157,242}
modern cssclick to select
/* mix without leaving CSS */
background: color-mix(in oklab, #999df2 85%, white);
border-color: color-mix(in oklab, #999df2 40%, transparent);
/* theme-aware in one line */
color: light-dark(#0E1371, #D3D4EE);
/* relative colour syntax */
--hover: hsl(from #999df2 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: #F3F3FC;
  --brand-100: #E6E7F9;
  --brand-200: #C7C9F4;
  --brand-300: #999df2;
  --brand-400: #6A70EC;
  --brand-500: #3840E6;
  --brand-600: #1C24D9;
  --brand-700: #171EB5;
  --brand-800: #121891;
  --brand-900: #121669;
  --brand-950: #0B0D41;
  --brand: #999df2;
  --brand-ink: #000000;
  --brand-surface: #F4F5FA;
  --brand-border: #C0C2ED;
  --brand-hover: #7A7FEE;
  --brand-pressed: #5A60EA;
}
@media (prefers-color-scheme: dark) {
  :root {
    --brand-surface: #141424;
    --brand-ink: #D3D4EE;
  }
}
tailwind.config.jsclick to select
theme: {
  extend: {
    colors: {
      brand: {
        50: '#F3F3FC',
        100: '#E6E7F9',
        200: '#C7C9F4',
        300: '#999df2',
        400: '#6A70EC',
        500: '#3840E6',
        600: '#1C24D9',
        700: '#171EB5',
        800: '#121891',
        900: '#121669',
        950: '#0B0D41',
        DEFAULT: '#999df2',
      },
    },
  },
}
scss mapclick to select
$brand: (
  '50': #F3F3FC,
  '100': #E6E7F9,
  '200': #C7C9F4,
  '300': #999df2,
  '400': #6A70EC,
  '500': #3840E6,
  '600': #1C24D9,
  '700': #171EB5,
  '800': #121891,
  '900': #121669,
  '950': #0B0D41,
);
$brand-base: #999df2;
$brand-ink: #000000;

@function brand($step) { @return map-get($brand, $step); }
w3c design tokens (json)click to select
{
  "color": {
    "brand": {
      "50": { "$value": "#F3F3FC", "$type": "color" },
      "100": { "$value": "#E6E7F9", "$type": "color" },
      "200": { "$value": "#C7C9F4", "$type": "color" },
      "300": { "$value": "#999df2", "$type": "color" },
      "400": { "$value": "#6A70EC", "$type": "color" },
      "500": { "$value": "#3840E6", "$type": "color" },
      "600": { "$value": "#1C24D9", "$type": "color" },
      "700": { "$value": "#171EB5", "$type": "color" },
      "800": { "$value": "#121891", "$type": "color" },
      "900": { "$value": "#121669", "$type": "color" },
      "950": { "$value": "#0B0D41", "$type": "color" }
    },
    "brandInk": { "$value": "#000000", "$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#000000 on #999df2 · 8.46:1
Use #000000AAA at every size.
Aa
12px
Aa
16px
Aa
24px
Aa
White text · 2.48:1
AA fail · AA large fail · AAA fail
Aa
Black text · 8.46:1 · recommended
AA pass · AA large pass · AAA pass
Reading the other direction: #999df2 as text scores 2.48:1 on white and 8.46:1 on black.
Best tinted ink on it, if plain black or white feels flat: #0E1371 at 6.26:1.

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
#5E65EB · 4.63:1
AA on white−13% L
#5E65EB
The quick fox
#363EE5 · 7.05:1
AAA on white−22% L
#363EE5
The quick fox
#999df2 · 8.46:1
AA on blackalready passes
#999df2
The quick fox
#999df2 · 8.46:1
AAA on blackalready passes
#999df2

Large text — 24px regular or 18.66px bold and above — only needs 3:1, so #8387EF 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
#999df2 on white: 2.48:1
AA ✗ fail · AA-large · AAA
Aa
#999df2 on black: 8.46:1
AA ✓ pass · AA-large · AAA
Against the neutral ladder

Contrast is symmetric, so each row covers both directions: #999df2 as text on that neutral, and that neutral as text on #999df2.

NeutralRatioBoth directions
White2.48:1AaAa
Slate 502.37:1AaAa
Slate 1002.27:1AaAa
Slate 2002.01:1AaAa
Slate 3001.67:1AaAa
Slate 4001.03:1AaAa
Slate 5001.92:1AaAa
Slate 6003.05:1AaAa
Slate 7004.17:1AaAa
Slate 8005.89:1AaAa
Slate 9007.19:1AaAa
Black8.46:1AaAa
Colour vision deficiency
true color
protanopia · #82A8F5
deuteranopia · #7DA1F0
tritanopia · #80ADBC

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. #999df2 is pinned to step 300; the rest hold its hue and let saturation ease off at the extremes so the pale end never turns neon.

#F3F3FC
#E6E7F9
#C7C9F4
#999df2
#6A70EC
#3840E6
#1C24D9
#171EB5
#121891
#121669
#0B0D41
Base = 300Lightest = 50 · #F3F3FCDarkest = 950 · #0B0D41Text 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 0.031 280.8);
  --brand-100: oklch(0.94 0.049 280.8);
  --brand-200: oklch(0.88 0.074 280.8);
  --brand-300: oklch(0.80 0.096 280.8);
  --brand-400: oklch(0.72 0.113 280.8);
  --brand-500: oklch(0.64 0.123 280.8);
  --brand-600: oklch(0.56 0.123 280.8);
  --brand-700: oklch(0.48 0.115 280.8);
  --brand-800: oklch(0.40 0.103 280.8);
  --brand-900: oklch(0.32 0.086 280.8);
  --brand-950: oklch(0.24 0.067 280.8);
}

Colors that work with #999df2

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

Text on it#000000
Black wins here
Surface#F4F5FA
Tinted page background
Border#C0C2ED
Hairlines and dividers
Muted text#4B4E9B
Captions on the surface
Accent#B98913
Second voice, not a rival
Dark variant#0E1371
Hover, pressed, headers
Light variant#E8E9FC
Selected rows, tints
Dark surface#141424
Dark-mode background
Hover#7A7FEE
One step down in lightness
Pressed#5A60EA
Two steps down
Disabled#F3F3F7
Chroma pulled out
Focus ring#A7AAF9
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 #999df2

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

Works well for
  • Text and icons on dark surfaces
  • Primary buttons and calls to action
  • Focus rings, active and selected states
  • Card and section backgrounds
  • Brand accents, badges and data highlights
Use with care
  • Text of any size on white — fails WCAG AA
  • Full-page backgrounds — tiring over long sessions
  • White text placed on it
  • Pairing with a same-lightness hue — edges vibrate
Minimum size as text on white
Not as text
Safe as a fill behind white type
No — use #0E1371
Safe as a 1px border on white
No — use #8387EF

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 lightness keeps it airy and approachable.

Worth knowing

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

Reads as
  • FormalityLow
  • EnergyHigh
  • Weight23/100
  • 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#F2EE99
Analogous left#99CAF2
Analogous right#C299F2
Split-complement 1#F2C299
Split-complement 2#CAF299
Triadic 1#F2999D
Triadic 2#9DF299
Tetradic#F299CA
On the wheel
Base+30°−30°+120°+240°+180°237°

#999df2 sits at 237°. Every dot is a harmony position and links to its own page in the table alongside.

RGB percentages

Red60.0%
Green61.6%
Blue94.9%
R · 0–255
153
0x99
G · 0–255
157
0x9d
B · 0–255
242
0xf2

CMYK percentages

Cyan36.8%
Magenta35.1%
Yellow0.0%
Key (black)5.1%

Total ink coverage is 77%. Most commercial presses cap around 300% — above that, sheets stop drying properly.

Color previews

#999df2 text on a black background

contrast 8.46:1

Card sample

#999df2 text on a white background

contrast 2.48:1

Card sample

#999df2 on grey

2.27:1

#999df2 on its own surface

2.28:1

#999df2 on its dark surface

7.32:1

CSS3 live lab

Text font color

The quick brown fox

color: #999df2;
Background color
Panel with #999df2 background
background-color: #999df2;
Text shadow — hex

Glowing headline

text-shadow: 2px 2px 8px #999df2;
Text shadow — RGB

Soft neon halo

text-shadow: 0 0 14px rgba(153, 157, 242, 0.45);
Div box shadow
Elevated card
box-shadow: 0 12px 32px -8px rgba(153, 157, 242, 0.45);
Border & gradient
Gradient panel
border: 3px solid #999df2;
background: linear-gradient(135deg, #999df2, #D099F2);
Gradient text

Gradient headline

background: linear-gradient(90deg, #999df2, #E799F2);
-webkit-background-clip: text;
color: transparent;
Focus ring
Focused control
outline: 2px solid #999df2;
outline-offset: 3px;
Underline & caret

Marked up text

text-decoration-color: #999df2;
caret-color: #999df2;
Left rule
Pull quote or callout
border-left: 4px solid #999df2;
Ring + tint
Selected chip
background: #E8E9FC;
box-shadow: inset 0 0 0 2px #999df2;
Conic badge
68%
background: conic-gradient(#999df2 68%, #e2e8f0 0);

Transparency

What each alpha value actually composites to. The top row is #999df2 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(153, 157, 242, 0.5)
rgb(153 157 242 / 50%)
#999df280
hsl(237 77% 78% / 50%)
color-mix(in srgb, #999df2 50%, transparent)
Alpha8-digit hexFlat on white
10%#999df21a#F5F5FE
20%#999df233#EBEBFC
40%#999df266#D6D8FA
60%#999df299#C2C4F7
80%#999df2cc#ADB1F5

Gradients from #999df2

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, #D0D1F9, #999df2 45%, #0E1371);
Duotone
A short hue run reads richer than a flat fill
background: linear-gradient(120deg, #999df2, #CD7EEF);
Complement sweep
Loud — keep it behind large type only
background: linear-gradient(90deg, #999df2, #F2EE99);
Spotlight
Hero panels and app headers
background: radial-gradient(120% 120% at 20% 0%, #EBEBFC 0%, #999df2 45%, #0E1371 100%);
Soft wash
Section backgrounds that stay readable
background: linear-gradient(180deg, #F4F5FA, #ffffff);
Mesh
Ambient background, no image weight
background: radial-gradient(60% 60% at 15% 20%, #C6E5F8 0%, transparent 60%), radial-gradient(55% 55% at 85% 15%, #D7B4F5 0%, transparent 60%), radial-gradient(70% 70% at 50% 95%, #0E1371 0%, transparent 65%), #999df2;

Monochromatic scale

Palettes built from #999df2

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.

#999df2 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
SurfacesBadgesHighlightsEmpty states
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

Usable as-is on a dark surface at 8.46:1.

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.

#999df2, answered

What color is #999df2?

#999df2 is a light electric blue, closest to Cornflower Blue (ΔE2000 10.3). It sits at 237° on the hue wheel with 77% saturation and 78% lightness, which reads as cool.

What is the RGB value of #999df2?

rgb(153, 157, 242) — 153 red, 157 green and 242 blue out of 255, or 60% / 61.6% / 94.9% by channel.

What is #999df2 in HSL and HSV?

hsl(237, 77%, 78%) and hsv(237, 37%, 95%). HSL is what CSS takes; HSV is what your design tool's picker shows, which is why the saturation numbers rarely match.

Is #999df2 a light or a dark color?

It is a mid-tone. Relative luminance is 0.3730 and perceived brightness is 66%, so black text on it reaches 8.46:1.

Should I use black or white text on #999df2?

Black. It scores 8.46:1 against #999df2, versus 2.48:1 for white — AAA at any size.

Is #999df2 accessible on a white background?

#999df2 on white scores 2.48:1, which fails WCAG AA at every size. Darken it to #5E65EB to reach 4.5:1, or #363EE5 for 7:1.

What is the complementary color of #999df2?

#F2EE99 sits directly opposite on the wheel. Softer options are the split-complements #F2C299 and #CAF299, which give the same contrast with far less vibration.

What colors go well with #999df2?

For interface work: #F4F5FA as the surface, #C0C2ED for borders, #4B4E9B for secondary text, #B98913 as an accent and #0E1371 for hover and pressed states. For a palette, the analogous pair #99CAF2 and #C299F2 stays calm, while #F2EE99 is the loudest partner.

What is #999df2 in CMYK for printing?

cmyk(37%, 35%, 0%, 5%). 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 #999df2 warm or cool?

Cool — it scores 85 on a scale where 0 is the warmest orange and 100 the coolest azure. Nudged warmer it becomes #B699F2; nudged cooler, #98B7F3.

Which Tailwind color is closest to #999df2?

The blue family — its 500 step is #3b82f6, ΔE2000 14.8 away. That is a visible difference, so define #999df2 as a custom token rather than reaching for the built-in.

How do I use #999df2 in Tailwind CSS?

Inline it as an arbitrary value with bg-[#999df2] or text-[#999df2], 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 #999df2 with 50% opacity?

rgba(153, 157, 242, 0.5), or #999df280 in eight-digit hex. Over white that composites to #CCCEF9; over black, #4D4F79.

Is #999df2 a web-safe color?

No. The nearest web-safe colour is #9999FF, ΔE2000 2.4 away. The palette only matters for legacy displays and some email clients now.

What does the color #999df2 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 #999df2?

The safest is same-hue elevation: linear-gradient(135deg, #D0D1F9, #999df2 45%, #0E1371). For more colour, a short hue run to #CD7EEF keeps it rich without turning muddy.

Work with #999df2 in the Color Lab

Every tool opens with this colour already loaded.

Every value on this page is computed from #999df2 at request time — conversions, contrast ratios and ΔE distances are calculated, never looked up.