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Recognised as Colour

#383F55

  • #383F55
  • Blue
  • Dark
  • Nearest: Dark slate grey

#383F55 is a blue with RGB values 56, 63, 85 and HSL 226°, 21%, 28%. It is a dark colour, so white text on it reaches 10.4:1 contrast (AAA for normal text). The nearest named colour is Dark slate grey.

Colour values

#383F55#383F55
HEX#383F55
RGBrgb(56, 63, 85)
RGB (0–1)0.2196, 0.2471, 0.3333
RGB percentages22%, 24.7%, 33.3%
HSLhsl(225.5, 20.6%, 27.6%)
HSV / HSBhsv(225.5, 34.1%, 33.3%)
CMYK34.1%, 25.9%, 0%, 66.7%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer3,686,229
CSS custom property--colour: #383F55;

Brightness & contrast

Relative luminance0.05052WCAG 2.x, 0 is black and 1 is white
Perceived brightness64 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 10.45:1
Contrast with white10.45:1WCAG normal text: AAA
Contrast with black2.01:1WCAG normal text: Fail
Greyscale equivalent#3F3F3F
Inverted#C7C0AA

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#384156no red cones; affects about 1% of men; ΔE 1.3 from the original
Deuteranopia#363E54no green cones; the most common form, about 1% of men; ΔE 0.6 from the original
Tritanopia#304347no blue cones; rare, and affects men and women equally; ΔE 13.3 from the original
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text10.45:1WCAG large text: AAA
Contrast with black, large text2.01:1WCAG large text: Fail

Named colours

Dark slate grey · ΔE 18.6Dim grey · ΔE 22.7Slate grey · ΔE 26.7Light slate grey · ΔE 29.7Gray · ΔE 30.4Black · ΔE 30.5
Nearest named CSS colourDark slate grey (#2F4F4F)ΔE 18.65, a distinctly different colour
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#554E38
Analogous#384E55, #403855
Triadic#55383F, #3F5538
Split complementary#554038, #4E5538
Tetradic#55384E, #554E38, #385540

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#9CA4BD
Lighter +30%#7D88A9
Lighter +20%#616D92
Lighter +10%#4C5674
Darker −10%#242836
Darker −20%#0F1118
Darker −30%#000000
Darker −40%#000000
More saturated +25%#263667
Less saturated −25%#474747

Channel breakdown

R56
G63
B85
Red56 (22%)
Green63 (24.7%)
Blue85 (33.3%)
Hue225.52°
Saturation (HSL)20.57%
Lightness27.65%
Dominant channelBlue
Hex per channelR 38 · G 3F · B 55

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Every value on this page was computed from “383f55” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.