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Recognised as Colour

#1F4699

  • #1F4699
  • Blue
  • Dark
  • Nearest: Dark slateblue

#1F4699 is a blue with RGB values 31, 70, 153 and HSL 221°, 66%, 36%. It is a dark colour, so white text on it reaches 8.8:1 contrast (AAA for normal text). The nearest named colour is Dark slateblue.

Colour values

#1F4699#1F4699
HEX#1F4699
RGBrgb(31, 70, 153)
RGB (0–1)0.1216, 0.2745, 0.6
RGB percentages12.2%, 27.5%, 60%
HSLhsl(220.8, 66.3%, 36.1%)
HSV / HSBhsv(220.8, 79.7%, 60%)
CMYK79.7%, 54.2%, 0%, 40%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer2,049,689
CSS custom property--colour: #1F4699;

Brightness & contrast

Relative luminance0.06972WCAG 2.x, 0 is black and 1 is white
Perceived brightness76.4 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 8.77:1
Contrast with white8.77:1WCAG normal text: AAA
Contrast with black2.39:1WCAG normal text: Fail
Greyscale equivalent#444444
Inverted#E0B966

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#04519Cno red cones; affects about 1% of men; ΔE 9.1 from the original
Deuteranopia#004597no green cones; the most common form, about 1% of men; ΔE 2.7 from the original
Tritanopia#005A68no blue cones; rare, and affects men and women equally; ΔE 49.6 from the original
Distinguishable without hueShifts in lightness toonever rely on hue alone to carry meaning
Contrast with white, large text8.77:1WCAG large text: AAA
Contrast with black, large text2.39:1WCAG large text: Fail

Named colours

Dark slateblue · ΔE 11Midnight blue · ΔE 21.1Royal blue · ΔE 24.2Slate blue · ΔE 24.2Rebecca purple · ΔE 25.2Medium purple · ΔE 30
Nearest named CSS colourDark slateblue (#483D8B)ΔE 10.97, a distinctly different colour
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#99721F
Analogous#1F8399, #351F99
Triadic#991F46, #46991F
Split complementary#99351F, #83991F
Tetradic#991F83, #99721F, #1F9935

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#9AB3EA
Lighter +30%#6F94E2
Lighter +20%#4574D9
Lighter +10%#2859C3
Darker −10%#16336F
Darker −20%#0E1F44
Darker −30%#050C1A
Darker −40%#000000
More saturated +25%#083EB0
Less saturated −25%#364E82

Channel breakdown

R31
G70
B153
Red31 (12.2%)
Green70 (27.5%)
Blue153 (60%)
Hue220.82°
Saturation (HSL)66.3%
Lightness36.08%
Dominant channelBlue
Hex per channelR 1F · G 46 · B 99

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Every value on this page was computed from “1f4699” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.