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Recognised as Colour

#33648B

  • #33648B
  • Blue
  • Dark
  • Nearest: Steel blue

#33648B is a blue with RGB values 51, 100, 139 and HSL 207°, 46%, 37%. It is a dark colour, so white text on it reaches 6.3:1 contrast (AA for normal text). The nearest named colour is Steel blue.

Colour values

#33648B#33648B
HEX#33648B
RGBrgb(51, 100, 139)
RGB (0–1)0.2, 0.3922, 0.5451
RGB percentages20%, 39.2%, 54.5%
HSLhsl(206.6, 46.3%, 37.3%)
HSV / HSBhsv(206.6, 63.3%, 54.5%)
CMYK63.3%, 28.1%, 0%, 45.5%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer3,368,075
CSS custom property--colour: #33648B;

Brightness & contrast

Relative luminance0.11682WCAG 2.x, 0 is black and 1 is white
Perceived brightness94.1 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 6.29:1
Contrast with white6.29:1WCAG normal text: AA
Contrast with black3.34:1WCAG normal text: Fail
Greyscale equivalent#5C5C5C
Inverted#CC9B74

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#53658Dno red cones; affects about 1% of men; ΔE 8.6 from the original
Deuteranopia#475C8Ano green cones; the most common form, about 1% of men; ΔE 9.6 from the original
Tritanopia#006D72no blue cones; rare, and affects men and women equally; ΔE 25.8 from the original
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text6.29:1WCAG large text: AAA
Contrast with black, large text3.34:1WCAG large text: AA

Named colours

Steel blue · ΔE 13.1Slate grey · ΔE 20.1Light slate grey · ΔE 21.7Dark slate grey · ΔE 25.9Dim grey · ΔE 27Gray · ΔE 29.7
Nearest named CSS colourSteel blue (#4682B4)ΔE 13.07, a distinctly different colour
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#8B5A33
Analogous#338B86, #33388B
Triadic#8B3364, #648B33
Split complementary#8B3338, #8B8633
Tetradic#86338B, #8B5A33, #388B33

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#AAC8E0
Lighter +30%#85B0D2
Lighter +20%#6098C4
Lighter +10%#417FB0
Darker −10%#254966
Darker −20%#182E40
Darker −30%#0A131B
Darker −40%#000000
More saturated +25%#1B67A3
Less saturated −25%#4B6173

Channel breakdown

R51
G100
B139
Red51 (20%)
Green100 (39.2%)
Blue139 (54.5%)
Hue206.59°
Saturation (HSL)46.32%
Lightness37.25%
Dominant channelBlue
Hex per channelR 33 · G 64 · B 8B

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Every value on this page was computed from “33648b” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.