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Recognised as Colour

#4271FF

  • #4271FF
  • Blue
  • Dark
  • Nearest: Royal blue

#4271FF is a blue with RGB values 66, 113, 255 and HSL 225°, 100%, 63%. It is a dark colour, so black text on it reaches 5:1 contrast (AA for normal text). The nearest named colour is Royal blue.

Colour values

#4271FF#4271FF
HEX#4271FF
RGBrgb(66, 113, 255)
RGB (0–1)0.2588, 0.4431, 1
RGB percentages25.9%, 44.3%, 100%
HSLhsl(225.1, 100%, 62.9%)
HSV / HSBhsv(225.1, 74.1%, 100%)
CMYK74.1%, 55.7%, 0%, 0%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer4,354,559
CSS custom property--colour: #4271FF;

Brightness & contrast

Relative luminance0.20189WCAG 2.x, 0 is black and 1 is white
Perceived brightness127.3 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundBlackcontrast 5.04:1
Contrast with white4.17:1WCAG normal text: Fail
Contrast with black5.04:1WCAG normal text: AA
Greyscale equivalent#717171
Inverted#BD8E00

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#0085FFno red cones; affects about 1% of men; ΔE 18.1 from the original
Deuteranopia#0074FCno green cones; the most common form, about 1% of men; ΔE 7 from the original
Tritanopia#0094ADno blue cones; rare, and affects men and women equally; ΔE 77 from the original
Distinguishable without hueShifts in lightness toonever rely on hue alone to carry meaning
Contrast with white, large text4.17:1WCAG large text: AA
Contrast with black, large text5.04:1WCAG large text: AAA

Named colours

Royal blue · ΔE 12.3Medium slateblue · ΔE 13.3Slate blue · ΔE 19.1Medium purple · ΔE 25.7Dodgerblue · ΔE 26.1Rebecca purple · ΔE 35.6
Nearest named CSS colourRoyal blue (#4169E1)ΔE 12.25, a distinctly different colour
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#FFD042
Analogous#42D0FF, #7142FF
Triadic#FF4271, #71FF42
Split complementary#FF7142, #D0FF42
Tetradic#FF42D0, #FFD042, #42FF71

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#FFFFFF
Lighter +30%#DBE4FF
Lighter +20%#A8BEFF
Lighter +10%#7597FF
Darker −10%#0F4BFF
Darker −20%#0036DB
Darker −30%#002AA8
Darker −40%#001D75
More saturated +25%#4271FF
Less saturated −25%#5A7DE7

Channel breakdown

R66
G113
B255
Red66 (25.9%)
Green113 (44.3%)
Blue255 (100%)
Hue225.08°
Saturation (HSL)100%
Lightness62.94%
Dominant channelBlue
Hex per channelR 42 · G 71 · B FF

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Every value on this page was computed from “4271ff” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.