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Recognised as Colour

#309EFF

  • #309EFF
  • Blue
  • Dark
  • Nearest: Cornflower blue

#309EFF is a blue with RGB values 48, 158, 255 and HSL 208°, 100%, 59%. 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

#309EFF#309EFF
HEX#309EFF
RGBrgb(48, 158, 255)
RGB (0–1)0.1882, 0.6196, 1
RGB percentages18.8%, 62%, 100%
HSLhsl(208.1, 100%, 59.4%)
HSV / HSBhsv(208.1, 81.2%, 100%)
CMYK81.2%, 38%, 0%, 0%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer3,186,431
CSS custom property--colour: #309EFF;

Brightness & contrast

Relative luminance0.32302WCAG 2.x, 0 is black and 1 is white
Perceived brightness150.8 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundBlackcontrast 7.46:1
Contrast with white2.81:1WCAG normal text: Fail
Contrast with black7.46:1WCAG normal text: AAA
Greyscale equivalent#8E8E8E
Inverted#CF6100

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#6FA4FFno red cones; affects about 1% of men; ΔE 9.1 from the original
Deuteranopia#4E92FDno green cones; the most common form, about 1% of men; ΔE 10.6 from the original
Tritanopia#00B5C2no blue cones; rare, and affects men and women equally; ΔE 53.3 from the original
Distinguishable without hueShifts in lightness toonever rely on hue alone to carry meaning
Contrast with white, large text2.81:1WCAG large text: Fail
Contrast with black, large text7.46:1WCAG large text: AAA

Named colours

Cornflower blue · ΔE 9.9Dodgerblue · ΔE 10.6Deep skyblue · ΔE 26.5Steel blue · ΔE 27.8Royal blue · ΔE 29.5Light skyblue · ΔE 35.2
Nearest named CSS colourCornflower blue (#6495ED)ΔE 9.89, clearly different but related
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#FF9130
Analogous#30FFF8, #3037FF
Triadic#FF309E, #9EFF30
Split complementary#FF3036, #FFF830
Tetradic#F930FF, #FF9130, #37FF30

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#FCFEFF
Lighter +30%#C9E6FF
Lighter +20%#96CEFF
Lighter +10%#63B6FF
Darker −10%#0086FC
Darker −20%#006BC9
Darker −30%#005096
Darker −40%#003563
More saturated +25%#309EFF
Less saturated −25%#4A9CE5

Channel breakdown

R48
G158
B255
Red48 (18.8%)
Green158 (62%)
Blue255 (100%)
Hue208.12°
Saturation (HSL)100%
Lightness59.41%
Dominant channelBlue
Hex per channelR 30 · G 9E · B FF

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Every value on this page was computed from “309eff” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.