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Recognised as Colour

#309ED8

  • #309ED8
  • Blue
  • Dark
  • Nearest: Steel blue

#309ED8 is a blue with RGB values 48, 158, 216 and HSL 201°, 68%, 52%. It is a dark colour, so black text on it reaches 7:1 contrast (AAA for normal text). The nearest named colour is Steel blue.

Colour values

#309ED8#309ED8
HEX#309ED8
RGBrgb(48, 158, 216)
RGB (0–1)0.1882, 0.6196, 0.8471
RGB percentages18.8%, 62%, 84.7%
HSLhsl(200.7, 68.3%, 51.8%)
HSV / HSBhsv(200.7, 77.8%, 84.7%)
CMYK77.8%, 26.9%, 0%, 15.3%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer3,186,392
CSS custom property--colour: #309ED8;

Brightness & contrast

Relative luminance0.3004WCAG 2.x, 0 is black and 1 is white
Perceived brightness143.7 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundBlackcontrast 7.01:1
Contrast with white3:1WCAG normal text: Fail
Contrast with black7.01:1WCAG normal text: AAA
Greyscale equivalent#8B8B8B
Inverted#CF6127

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#829EDBno red cones; affects about 1% of men; ΔE 17.5 from the original
Deuteranopia#6C8ED7no green cones; the most common form, about 1% of men; ΔE 19.6 from the original
Tritanopia#00ADB2no blue cones; rare, and affects men and women equally; ΔE 34.4 from the original
Distinguishable without hueShifts in lightness toonever rely on hue alone to carry meaning
Contrast with white, large text3:1WCAG large text: Fail
Contrast with black, large text7.01:1WCAG large text: AAA

Named colours

Steel blue · ΔE 13Deep skyblue · ΔE 13.5Light skyblue · ΔE 20.5Cornflower blue · ΔE 23.1Sky blue · ΔE 24.6Light slate grey · ΔE 29
Nearest named CSS colourSteel blue (#4682B4)ΔE 12.97, a distinctly different colour
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#D86A30
Analogous#30D8BE, #304AD8
Triadic#D8309E, #9ED830
Split complementary#D8304A, #D8BE30
Tetradic#BE30D8, #D86A30, #4AD830

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#DCEEF8
Lighter +30%#B1DAF0
Lighter +20%#86C6E8
Lighter +10%#5BB2E0
Darker −10%#2281B3
Darker −20%#1A6288
Darker −30%#12435D
Darker −40%#0A2432
More saturated +25%#11A8F7
Less saturated −25%#4F94B9

Channel breakdown

R48
G158
B216
Red48 (18.8%)
Green158 (62%)
Blue216 (84.7%)
Hue200.71°
Saturation (HSL)68.29%
Lightness51.76%
Dominant channelBlue
Hex per channelR 30 · G 9E · B D8

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Every value on this page was computed from “309ed8” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.