Nerdulator> put something in

Recognised as Colour

#428AD1

  • #428AD1
  • Blue
  • Dark
  • Nearest: Steel blue

#428AD1 is a blue with RGB values 66, 138, 209 and HSL 210°, 61%, 54%. It is a dark colour, so black text on it reaches 5.8:1 contrast (AA for normal text). The nearest named colour is Steel blue.

Colour values

#428AD1#428AD1
HEX#428AD1
RGBrgb(66, 138, 209)
RGB (0–1)0.2588, 0.5412, 0.8196
RGB percentages25.9%, 54.1%, 82%
HSLhsl(209.8, 60.9%, 53.9%)
HSV / HSBhsv(209.8, 68.4%, 82%)
CMYK68.4%, 34%, 0%, 18%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer4,360,913
CSS custom property--colour: #428AD1;

Brightness & contrast

Relative luminance0.23939WCAG 2.x, 0 is black and 1 is white
Perceived brightness132.1 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundBlackcontrast 5.79:1
Contrast with white3.63:1WCAG normal text: Fail
Contrast with black5.79:1WCAG normal text: AA
Greyscale equivalent#808080
Inverted#BD752E

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#6A8ED4no red cones; affects about 1% of men; ΔE 7.9 from the original
Deuteranopia#5680D0no green cones; the most common form, about 1% of men; ΔE 9.8 from the original
Tritanopia#009BA4no blue cones; rare, and affects men and women equally; ΔE 42.1 from the original
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text3.63:1WCAG large text: AA
Contrast with black, large text5.79:1WCAG large text: AAA

Named colours

Steel blue · ΔE 12.3Cornflower blue · ΔE 12.4Dodgerblue · ΔE 22.7Deep skyblue · ΔE 24.5Light skyblue · ΔE 30Light slate grey · ΔE 32.1
Nearest named CSS colourSteel blue (#4682B4)ΔE 12.33, a distinctly different colour
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#D18942
Analogous#42D1D1, #4242D1
Triadic#D1428A, #8AD142
Split complementary#D14242, #D1D142
Tetradic#D142D1, #D18942, #42D142

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#E6F0F9
Lighter +30%#BDD6EF
Lighter +20%#94BDE5
Lighter +10%#6BA3DB
Darker −10%#2C70B4
Darker −20%#22578B
Darker −30%#183D62
Darker −40%#0E2439
More saturated +25%#258AEE
Less saturated −25%#5F8AB4

Channel breakdown

R66
G138
B209
Red66 (25.9%)
Green138 (54.1%)
Blue209 (82%)
Hue209.79°
Saturation (HSL)60.85%
Lightness53.92%
Dominant channelBlue
Hex per channelR 42 · G 8A · B D1

Keep nerding

Every link below is a page Nerdulator can generate from what it already knows about this value.

Nerdulate something else

Nothing in mind? Surprise me · today’s page

Every value on this page was computed from “428ad1” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.