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Recognised as Colour

#1F72AA

  • #1F72AA
  • Blue
  • Dark
  • Nearest: Steel blue

#1F72AA is a blue with RGB values 31, 114, 170 and HSL 204°, 69%, 39%. It is a dark colour, so white text on it reaches 5.2:1 contrast (AA for normal text). The nearest named colour is Steel blue.

Colour values

#1F72AA#1F72AA
HEX#1F72AA
RGBrgb(31, 114, 170)
RGB (0–1)0.1216, 0.4471, 0.6667
RGB percentages12.2%, 44.7%, 66.7%
HSLhsl(204.2, 69.2%, 39.4%)
HSV / HSBhsv(204.2, 81.8%, 66.7%)
CMYK81.8%, 32.9%, 0%, 33.3%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer2,060,970
CSS custom property--colour: #1F72AA;

Brightness & contrast

Relative luminance0.15228WCAG 2.x, 0 is black and 1 is white
Perceived brightness105.9 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 5.19:1
Contrast with white5.19:1WCAG normal text: AA
Contrast with black4.05:1WCAG normal text: Fail
Greyscale equivalent#646464
Inverted#E08D55

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#5874ACno red cones; affects about 1% of men; ΔE 10.8 from the original
Deuteranopia#4467A9no green cones; the most common form, about 1% of men; ΔE 12.6 from the original
Tritanopia#008086no blue cones; rare, and affects men and women equally; ΔE 34 from the original
Distinguishable without hueShifts in lightness toonever rely on hue alone to carry meaning
Contrast with white, large text5.19:1WCAG large text: AAA
Contrast with black, large text4.05:1WCAG large text: AA

Named colours

Steel blue · ΔE 7.9Cornflower blue · ΔE 24.3Slate grey · ΔE 27.1Light slate grey · ΔE 27.5Deep skyblue · ΔE 30.5Dodgerblue · ΔE 33
Nearest named CSS colourSteel blue (#4682B4)ΔE 7.94, clearly different but related
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#AA571F
Analogous#1FAA9C, #1F2DAA
Triadic#AA1F72, #72AA1F
Split complementary#AA1F2C, #AA9D1F
Tetradic#9D1FAA, #AA571F, #2DAA1F

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#A6D2EF
Lighter +30%#7BBBE7
Lighter +20%#50A5DF
Lighter +10%#278FD5
Darker −10%#17557F
Darker −20%#0F3854
Darker −30%#071B29
Darker −40%#000000
More saturated +25%#0677C3
Less saturated −25%#386D91

Channel breakdown

R31
G114
B170
Red31 (12.2%)
Green114 (44.7%)
Blue170 (66.7%)
Hue204.17°
Saturation (HSL)69.15%
Lightness39.41%
Dominant channelBlue
Hex per channelR 1F · G 72 · B AA

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Every value on this page was computed from “1f72aa” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.