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Colour

#4181BF

  • #4181BF
  • Blue
  • Dark
  • Nearest: Steel blue

#4181BF is a blue with RGB values 65, 129, 191 and HSL 210°, 50%, 50%. It is a dark colour, so black text on it reaches 5.1:1 contrast (AA for normal text). The nearest named colour is Steel blue.

Colour values

#4181BF#4181BF
HEX#4181BF
RGBrgb(65, 129, 191)
RGB (0–1)0.2549, 0.5059, 0.749
RGB percentages25.5%, 50.6%, 74.9%
HSLhsl(209.5, 49.6%, 50.2%)
HSV / HSBhsv(209.5, 66%, 74.9%)
CMYK66%, 32.5%, 0%, 25.1%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer4,293,055
CSS custom property--colour: #4181BF;

Brightness & contrast

Relative luminance0.20586WCAG 2.x, 0 is black and 1 is white
Perceived brightness123.2 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundBlackcontrast 5.12:1
Contrast with white4.1:1WCAG normal text: Fail
Contrast with black5.12:1WCAG normal text: AA
Greyscale equivalent#787878
Inverted#BE7E40

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#6684C2no red cones; affects about 1% of men; ΔE 8.1 from the original
Deuteranopia#5478BEno green cones; the most common form, about 1% of men; ΔE 9.2 from the original
Tritanopia#009097no blue cones; rare, and affects men and women equally; ΔE 38.3 from the original
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text4.1:1WCAG large text: AA
Contrast with black, large text5.12:1WCAG large text: AAA

Named colours

Steel blue · ΔE 7.1Cornflower blue · ΔE 17.5Deep skyblue · ΔE 26.6Light slate grey · ΔE 27.6Slate grey · ΔE 27.9Dodgerblue · ΔE 28
Nearest named CSS colourSteel blue (#4682B4)ΔE 7.14, clearly different but related
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#BF7F41
Analogous#41BFBE, #4142BF
Triadic#BF4181, #81BF41
Split complementary#BF4142, #BFBE41
Tetradic#BE41BF, #BF7F41, #42BF41

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#DAE6F2
Lighter +30%#B3CDE6
Lighter +20%#8DB4D9
Lighter +10%#679ACC
Darker −10%#346799
Darker −20%#274E73
Darker −30%#1A344D
Darker −40%#0D1A27
More saturated +25%#2182DF
Less saturated −25%#61809F

Channel breakdown

R65
G129
B191
Red65 (25.5%)
Green129 (50.6%)
Blue191 (74.9%)
Hue209.52°
Saturation (HSL)49.61%
Lightness50.2%
Dominant channelBlue
Hex per channelR 41 · G 81 · B BF

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Every value on this page was computed from “4181bf” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.