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Recognised as Colour

#6599FB

  • #6599FB
  • Blue
  • Dark
  • Nearest: Cornflower blue

#6599FB is a blue with RGB values 101, 153, 251 and HSL 219°, 95%, 69%. It is a dark colour, so black text on it reaches 7.5:1 contrast (AAA for normal text). The nearest named colour is Cornflower blue.

Colour values

#6599FB#6599FB
HEX#6599FB
RGBrgb(101, 153, 251)
RGB (0–1)0.3961, 0.6, 0.9843
RGB percentages39.6%, 60%, 98.4%
HSLhsl(219.2, 94.9%, 69%)
HSV / HSBhsv(219.2, 59.8%, 98.4%)
CMYK59.8%, 39%, 0%, 1.6%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer6,658,555
CSS custom property--colour: #6599FB;

Brightness & contrast

Relative luminance0.32514WCAG 2.x, 0 is black and 1 is white
Perceived brightness154.8 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundBlackcontrast 7.5:1
Contrast with white2.8:1WCAG normal text: Fail
Contrast with black7.5:1WCAG normal text: AAA
Greyscale equivalent#959595
Inverted#9A6604

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#6FA2FFno red cones; affects about 1% of men; ΔE 4.6 from the original
Deuteranopia#5A94F9no green cones; the most common form, about 1% of men; ΔE 2.8 from the original
Tritanopia#00AFBEno blue cones; rare, and affects men and women equally; ΔE 56.2 from the original
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text2.8:1WCAG large text: Fail
Contrast with black, large text7.5:1WCAG large text: AAA

Named colours

Cornflower blue · ΔE 5.6Dodgerblue · ΔE 10.4Royal blue · ΔE 24.3Medium purple · ΔE 26.9Steel blue · ΔE 29.2Slate blue · ΔE 30.8
Nearest named CSS colourCornflower blue (#6495ED)ΔE 5.64, clearly different but related
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#FBC765
Analogous#65E4FB, #7C65FB
Triadic#FB6599, #99FB65
Split complementary#FB7C65, #E4FB65
Tetradic#FB65E4, #FBC765, #65FB7C

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#FFFFFF
Lighter +30%#FAFCFF
Lighter +20%#C8DBFE
Lighter +10%#97BAFC
Darker −10%#3378FA
Darker −20%#0659F4
Darker −30%#0547C2
Darker −40%#043490
More saturated +25%#6198FF
Less saturated −25%#799FE7

Channel breakdown

R101
G153
B251
Red101 (39.6%)
Green153 (60%)
Blue251 (98.4%)
Hue219.2°
Saturation (HSL)94.94%
Lightness69.02%
Dominant channelBlue
Hex per channelR 65 · G 99 · B FB

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Every value on this page was computed from “6599fb” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.