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Recognised as Colour

#3F74AB

  • #3F74AB
  • Blue
  • Dark
  • Nearest: Steel blue

#3F74AB is a blue with RGB values 63, 116, 171 and HSL 211°, 46%, 46%. It is a dark colour, so white text on it reaches 4.9:1 contrast (AA for normal text). The nearest named colour is Steel blue.

Colour values

#3F74AB#3F74AB
HEX#3F74AB
RGBrgb(63, 116, 171)
RGB (0–1)0.2471, 0.4549, 0.6706
RGB percentages24.7%, 45.5%, 67.1%
HSLhsl(210.6, 46.2%, 45.9%)
HSV / HSBhsv(210.6, 63.2%, 67.1%)
CMYK63.2%, 32.2%, 0%, 32.9%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer4,158,635
CSS custom property--colour: #3F74AB;

Brightness & contrast

Relative luminance0.16488WCAG 2.x, 0 is black and 1 is white
Perceived brightness111.4 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 4.89:1
Contrast with white4.89:1WCAG normal text: AA
Contrast with black4.3:1WCAG normal text: Fail
Greyscale equivalent#6D6D6D
Inverted#C08B54

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#5C77ADno red cones; affects about 1% of men; ΔE 6.5 from the original
Deuteranopia#4E6CAAno green cones; the most common form, about 1% of men; ΔE 8.1 from the original
Tritanopia#008188no blue cones; rare, and affects men and women equally; ΔE 34.7 from the original
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text4.89:1WCAG large text: AAA
Contrast with black, large text4.3:1WCAG large text: AA

Named colours

Steel blue · ΔE 6.7Cornflower blue · ΔE 22.6Slate grey · ΔE 24.7Light slate grey · ΔE 25Deep skyblue · ΔE 31.5Dark slateblue · ΔE 32
Nearest named CSS colourSteel blue (#4682B4)ΔE 6.7, clearly different but related
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#AB763F
Analogous#3FAAAB, #403FAB
Triadic#AB3F74, #74AB3F
Split complementary#AB403F, #AAAB3F
Tetradic#AB3FAA, #AB763F, #3FAB40

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#CADBEC
Lighter +30%#A5C1DE
Lighter +20%#80A7D0
Lighter +10%#5B8EC2
Darker −10%#315B86
Darker −20%#244160
Darker −30%#16283B
Darker −40%#080F16
More saturated +25%#2273C8
Less saturated −25%#5C758E

Channel breakdown

R63
G116
B171
Red63 (24.7%)
Green116 (45.5%)
Blue171 (67.1%)
Hue210.56°
Saturation (HSL)46.15%
Lightness45.88%
Dominant channelBlue
Hex per channelR 3F · G 74 · B AB

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Every value on this page was computed from “3f74ab” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.