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Recognised as Colour

#216AFF

  • #216AFF
  • Blue
  • Dark
  • Nearest: Medium slateblue

#216AFF is a blue with RGB values 33, 106, 255 and HSL 220°, 100%, 56%. It is a dark colour, so white text on it reaches 4.6:1 contrast (AA for normal text). The nearest named colour is Medium slateblue.

Colour values

#216AFF#216AFF
HEX#216AFF
RGBrgb(33, 106, 255)
RGB (0–1)0.1294, 0.4157, 1
RGB percentages12.9%, 41.6%, 100%
HSLhsl(220.3, 100%, 56.5%)
HSV / HSBhsv(220.3, 87.1%, 100%)
CMYK87.1%, 58.4%, 0%, 0%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer2,190,079
CSS custom property--colour: #216AFF;

Brightness & contrast

Relative luminance0.17851WCAG 2.x, 0 is black and 1 is white
Perceived brightness119.7 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 4.59:1
Contrast with white4.59:1WCAG normal text: AA
Contrast with black4.57:1WCAG normal text: AA
Greyscale equivalent#656565
Inverted#DE9500

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#0080FFno red cones; affects about 1% of men; ΔE 18.2 from the original
Deuteranopia#006CFCno green cones; the most common form, about 1% of men; ΔE 3.8 from the original
Tritanopia#0090AAno blue cones; rare, and affects men and women equally; ΔE 80.4 from the original
Distinguishable without hueShifts in lightness toonever rely on hue alone to carry meaning
Contrast with white, large text4.59:1WCAG large text: AAA
Contrast with black, large text4.57:1WCAG large text: AAA

Named colours

Medium slateblue · ΔE 16.3Royal blue · ΔE 16.3Slate blue · ΔE 22.4Medium purple · ΔE 30.3Dodgerblue · ΔE 30.5Blue violet · ΔE 37.1
Nearest named CSS colourMedium slateblue (#7B68EE)ΔE 16.31, a distinctly different colour
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#FFB621
Analogous#21D9FF, #4721FF
Triadic#FF216A, #6AFF21
Split complementary#FF4721, #D9FF21
Tetradic#FF21D9, #FFB621, #21FF47

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#EDF3FF
Lighter +30%#BAD1FF
Lighter +20%#87AEFF
Lighter +10%#548CFF
Darker −10%#004EED
Darker −20%#003DBA
Darker −30%#002C87
Darker −40%#001C54
More saturated +25%#216AFF
Less saturated −25%#3D74E3

Channel breakdown

R33
G106
B255
Red33 (12.9%)
Green106 (41.6%)
Blue255 (100%)
Hue220.27°
Saturation (HSL)100%
Lightness56.47%
Dominant channelBlue
Hex per channelR 21 · G 6A · B FF

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Every value on this page was computed from “216aff” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.