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Recognised as Colour

#303DFF

  • #303DFF
  • Blue
  • Dark
  • Nearest: Medium blue

#303DFF is a blue with RGB values 48, 61, 255 and HSL 236°, 100%, 59%. It is a dark colour, so white text on it reaches 6.5:1 contrast (AA for normal text). The nearest named colour is Medium blue.

Colour values

#303DFF#303DFF
HEX#303DFF
RGBrgb(48, 61, 255)
RGB (0–1)0.1882, 0.2392, 1
RGB percentages18.8%, 23.9%, 100%
HSLhsl(236.2, 100%, 59.4%)
HSV / HSBhsv(236.2, 81.2%, 100%)
CMYK81.2%, 76.1%, 0%, 0%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer3,161,599
CSS custom property--colour: #303DFF;

Brightness & contrast

Relative luminance0.11186WCAG 2.x, 0 is black and 1 is white
Perceived brightness101.4 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 6.49:1
Contrast with white6.49:1WCAG normal text: AA
Contrast with black3.24:1WCAG normal text: Fail
Greyscale equivalent#484848
Inverted#CFC200

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#0068FFno red cones; affects about 1% of men; ΔE 31.7 from the original
Deuteranopia#0053FCno green cones; the most common form, about 1% of men; ΔE 16.9 from the original
Tritanopia#00789Dno blue cones; rare, and affects men and women equally; ΔE 101.4 from the original
Distinguishable without hueShifts in lightness toonever rely on hue alone to carry meaning
Contrast with white, large text6.49:1WCAG large text: AAA
Contrast with black, large text3.24:1WCAG large text: AA

Named colours

Medium blue · ΔE 16.5Blue violet · ΔE 22.4Blue · ΔE 23.4Dark violet · ΔE 29.1Dark orchid · ΔE 35.5Medium slateblue · ΔE 37.9
Nearest named CSS colourMedium blue (#0000CD)ΔE 16.54, a distinctly different colour
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#FFF230
Analogous#30A5FF, #8A30FF
Triadic#FF303D, #3DFF30
Split complementary#FF8A30, #A5FF30
Tetradic#FF30A5, #FFF230, #30FF8A

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#FCFCFF
Lighter +30%#C9CCFF
Lighter +20%#969DFF
Lighter +10%#636DFF
Darker −10%#0010FC
Darker −20%#000DC9
Darker −30%#000996
Darker −40%#000663
More saturated +25%#303DFF
Less saturated −25%#4A54E5

Channel breakdown

R48
G61
B255
Red48 (18.8%)
Green61 (23.9%)
Blue255 (100%)
Hue236.23°
Saturation (HSL)100%
Lightness59.41%
Dominant channelBlue
Hex per channelR 30 · G 3D · B FF

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Every value on this page was computed from “303dff” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.