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Recognised as Colour

#303ABB

  • #303ABB
  • Blue
  • Dark
  • Nearest: Slate blue

#303ABB is a blue with RGB values 48, 58, 187 and HSL 236°, 59%, 46%. It is a dark colour, so white text on it reaches 8.6:1 contrast (AAA for normal text). The nearest named colour is Slate blue.

Colour values

#303ABB#303ABB
HEX#303ABB
RGBrgb(48, 58, 187)
RGB (0–1)0.1882, 0.2275, 0.7333
RGB percentages18.8%, 22.7%, 73.3%
HSLhsl(235.7, 59.1%, 46.1%)
HSV / HSBhsv(235.7, 74.3%, 73.3%)
CMYK74.3%, 69%, 0%, 26.7%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer3,160,763
CSS custom property--colour: #303ABB;

Brightness & contrast

Relative luminance0.07242WCAG 2.x, 0 is black and 1 is white
Perceived brightness81.5 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 8.58:1
Contrast with white8.58:1WCAG normal text: AAA
Contrast with black2.45:1WCAG normal text: Fail
Greyscale equivalent#414141
Inverted#CFC544

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#0053BFno red cones; affects about 1% of men; ΔE 19.6 from the original
Deuteranopia#0045B9no green cones; the most common form, about 1% of men; ΔE 11.2 from the original
Tritanopia#005D76no blue cones; rare, and affects men and women equally; ΔE 72.4 from the original
Distinguishable without hueShifts in lightness toonever rely on hue alone to carry meaning
Contrast with white, large text8.58:1WCAG large text: AAA
Contrast with black, large text2.45:1WCAG large text: Fail

Named colours

Slate blue · ΔE 17.5Medium slateblue · ΔE 20.1Dark blue · ΔE 20.3Navy · ΔE 21Royal blue · ΔE 21.2Rebecca purple · ΔE 21.6
Nearest named CSS colourSlate blue (#6A5ACD)ΔE 17.46, a distinctly different colour
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#BBB130
Analogous#3080BB, #6B30BB
Triadic#BB303A, #3ABB30
Split complementary#BB6B30, #80BB30
Tetradic#BB3080, #BBB130, #30BB6B

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#C7CAF0
Lighter +30%#9EA3E6
Lighter +20%#757DDC
Lighter +10%#4D56D1
Darker −10%#262D92
Darker −20%#1B216A
Darker −30%#111441
Darker −40%#060819
More saturated +25%#1321D8
Less saturated −25%#4D539E

Channel breakdown

R48
G58
B187
Red48 (18.8%)
Green58 (22.7%)
Blue187 (73.3%)
Hue235.68°
Saturation (HSL)59.15%
Lightness46.08%
Dominant channelBlue
Hex per channelR 30 · G 3A · B BB

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