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Recognised as Colour

#3A3F54

  • #3A3F54
  • Blue
  • Dark
  • Nearest: Dark slate grey

#3A3F54 is a blue with RGB values 58, 63, 84 and HSL 228°, 18%, 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

#3A3F54#3A3F54
HEX#3A3F54
RGBrgb(58, 63, 84)
RGB (0–1)0.2275, 0.2471, 0.3294
RGB percentages22.7%, 24.7%, 32.9%
HSLhsl(228.5, 18.3%, 27.8%)
HSV / HSBhsv(228.5, 31%, 32.9%)
CMYK31%, 25%, 0%, 67.1%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer3,817,300
CSS custom property--colour: #3A3F54;

Brightness & contrast

Relative luminance0.05095WCAG 2.x, 0 is black and 1 is white
Perceived brightness64.3 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 10.4:1
Contrast with white10.4:1WCAG normal text: AAA
Contrast with black2.02:1WCAG normal text: Fail
Greyscale equivalent#3F3F3F
Inverted#C5C0AB

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#394155no red cones; affects about 1% of men; ΔE 1.5 from the original
Deuteranopia#373F53no green cones; the most common form, about 1% of men; ΔE 1.4 from the original
Tritanopia#334346no blue cones; rare, and affects men and women equally; ΔE 13.1 from the original
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text10.4:1WCAG large text: AAA
Contrast with black, large text2.02:1WCAG large text: Fail

Named colours

Dark slate grey · ΔE 18.5Dim grey · ΔE 22.2Slate grey · ΔE 26.6Light slate grey · ΔE 29.6Gray · ΔE 29.9Black · ΔE 30.3
Nearest named CSS colourDark slate grey (#2F4F4F)ΔE 18.48, a distinctly different colour
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#544F3A
Analogous#3A4C54, #423A54
Triadic#543A3F, #3F543A
Split complementary#54423A, #4C543A
Tetradic#543A4C, #544F3A, #3A5442

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#9EA4BC
Lighter +30%#8087A7
Lighter +20%#646C90
Lighter +10%#4F5672
Darker −10%#252836
Darker −20%#101218
Darker −30%#000000
Darker −40%#000000
More saturated +25%#283466
Less saturated −25%#474747

Channel breakdown

R58
G63
B84
Red58 (22.7%)
Green63 (24.7%)
Blue84 (32.9%)
Hue228.46°
Saturation (HSL)18.31%
Lightness27.84%
Dominant channelBlue
Hex per channelR 3A · G 3F · B 54

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Every value on this page was computed from “3a3f54” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.