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Recognised as Colour

#2843B8

  • #2843B8
  • Blue
  • Dark
  • Nearest: Slate blue

#2843B8 is a blue with RGB values 40, 67, 184 and HSL 229°, 64%, 44%. It is a dark colour, so white text on it reaches 8.1:1 contrast (AAA for normal text). The nearest named colour is Slate blue.

Colour values

#2843B8#2843B8
HEX#2843B8
RGBrgb(40, 67, 184)
RGB (0–1)0.1569, 0.2627, 0.7216
RGB percentages15.7%, 26.3%, 72.2%
HSLhsl(228.8, 64.3%, 43.9%)
HSV / HSBhsv(228.8, 78.3%, 72.2%)
CMYK78.3%, 63.6%, 0%, 27.8%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer2,638,776
CSS custom property--colour: #2843B8;

Brightness & contrast

Relative luminance0.07926WCAG 2.x, 0 is black and 1 is white
Perceived brightness83.5 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 8.12:1
Contrast with white8.12:1WCAG normal text: AAA
Contrast with black2.59:1WCAG normal text: Fail
Greyscale equivalent#464646
Inverted#D7BC47

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#0056BCno red cones; affects about 1% of men; ΔE 15 from the original
Deuteranopia#0049B6no green cones; the most common form, about 1% of men; ΔE 7.4 from the original
Tritanopia#006277no blue cones; rare, and affects men and women equally; ΔE 67.2 from the original
Distinguishable without hueShifts in lightness toonever rely on hue alone to carry meaning
Contrast with white, large text8.12:1WCAG large text: AAA
Contrast with black, large text2.59:1WCAG large text: Fail

Named colours

Slate blue · ΔE 13.7Royal blue · ΔE 15.5Rebecca purple · ΔE 20.1Medium slateblue · ΔE 20.1Midnight blue · ΔE 23.3Dark slateblue · ΔE 23.5
Nearest named CSS colourSlate blue (#6A5ACD)ΔE 13.7, a distinctly different colour
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#B89D28
Analogous#288BB8, #5528B8
Triadic#B82843, #43B828
Split complementary#B85528, #8BB828
Tetradic#B8288B, #B89D28, #28B855

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#BCC6F0
Lighter +30%#92A2E7
Lighter +20%#687EDE
Lighter +10%#3E5AD5
Darker −10%#1F348E
Darker −20%#162464
Darker −30%#0D153A
Darker −40%#040610
More saturated +25%#0C32D4
Less saturated −25%#44549C

Channel breakdown

R40
G67
B184
Red40 (15.7%)
Green67 (26.3%)
Blue184 (72.2%)
Hue228.75°
Saturation (HSL)64.29%
Lightness43.92%
Dominant channelBlue
Hex per channelR 28 · G 43 · B B8

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Every value on this page was computed from “2843b8” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.