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Recognised as Colour

#3356B4

  • #3356B4
  • Blue
  • Dark
  • Nearest: Dark slateblue

#3356B4 is a blue with RGB values 51, 86, 180 and HSL 224°, 56%, 45%. It is a dark colour, so white text on it reaches 6.7:1 contrast (AA for normal text). The nearest named colour is Dark slateblue.

Colour values

#3356B4#3356B4
HEX#3356B4
RGBrgb(51, 86, 180)
RGB (0–1)0.2, 0.3373, 0.7059
RGB percentages20%, 33.7%, 70.6%
HSLhsl(223.7, 55.8%, 45.3%)
HSV / HSBhsv(223.7, 71.7%, 70.6%)
CMYK71.7%, 52.2%, 0%, 29.4%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer3,364,532
CSS custom property--colour: #3356B4;

Brightness & contrast

Relative luminance0.10655WCAG 2.x, 0 is black and 1 is white
Perceived brightness93.9 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 6.71:1
Contrast with white6.71:1WCAG normal text: AA
Contrast with black3.13:1WCAG normal text: Fail
Greyscale equivalent#555555
Inverted#CCA94B

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#1962B7no red cones; affects about 1% of men; ΔE 10.3 from the original
Deuteranopia#0056B2no green cones; the most common form, about 1% of men; ΔE 5.2 from the original
Tritanopia#006C7Cno blue cones; rare, and affects men and women equally; ΔE 54.8 from the original
Distinguishable without hueShifts in lightness toonever rely on hue alone to carry meaning
Contrast with white, large text6.71:1WCAG large text: AAA
Contrast with black, large text3.13:1WCAG large text: AA

Named colours

Dark slateblue · ΔE 15.4Royal blue · ΔE 15.8Slate blue · ΔE 17.6Medium purple · ΔE 23.4Rebecca purple · ΔE 24.5Dodgerblue · ΔE 24.8
Nearest named CSS colourDark slateblue (#483D8B)ΔE 15.36, a distinctly different colour
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#B49133
Analogous#3396B4, #5133B4
Triadic#B43356, #56B433
Split complementary#B45133, #96B433
Tetradic#B43396, #B49133, #33B451

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#C5D0EE
Lighter +30%#9DB0E3
Lighter +20%#7590D8
Lighter +10%#4D70CD
Darker −10%#28438C
Darker −20%#1C3065
Darker −30%#111D3D
Darker −40%#060A15
More saturated +25%#1649D1
Less saturated −25%#506397

Channel breakdown

R51
G86
B180
Red51 (20%)
Green86 (33.7%)
Blue180 (70.6%)
Hue223.72°
Saturation (HSL)55.84%
Lightness45.29%
Dominant channelBlue
Hex per channelR 33 · G 56 · B B4

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Every value on this page was computed from “3356b4” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.