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Colour

#1D2F71

  • #1D2F71
  • Blue
  • Dark
  • Nearest: Dark slateblue

#1D2F71 is a blue with RGB values 29, 47, 113 and HSL 227°, 59%, 28%. It is a dark colour, so white text on it reaches 12.4:1 contrast (AAA for normal text). The nearest named colour is Dark slateblue.

Colour values

#1D2F71#1D2F71
HEX#1D2F71
RGBrgb(29, 47, 113)
RGB (0–1)0.1137, 0.1843, 0.4431
RGB percentages11.4%, 18.4%, 44.3%
HSLhsl(227.1, 59.2%, 27.8%)
HSV / HSBhsv(227.1, 74.3%, 44.3%)
CMYK74.3%, 58.4%, 0%, 55.7%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer1,912,689
CSS custom property--colour: #1D2F71;

Brightness & contrast

Relative luminance0.03486WCAG 2.x, 0 is black and 1 is white
Perceived brightness54.8 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 12.37:1
Contrast with white12.37:1WCAG normal text: AAA
Contrast with black1.7:1WCAG normal text: Fail
Greyscale equivalent#303030
Inverted#E2D08E

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#003873no red cones; affects about 1% of men; ΔE 9 from the original
Deuteranopia#003170no green cones; the most common form, about 1% of men; ΔE 4.8 from the original
Tritanopia#003F4Bno blue cones; rare, and affects men and women equally; ΔE 41.5 from the original
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text12.37:1WCAG large text: AAA
Contrast with black, large text1.7:1WCAG large text: Fail

Named colours

Dark slateblue · ΔE 12.4Midnight blue · ΔE 17.9Rebecca purple · ΔE 28.4Slate blue · ΔE 34.6Indigo · ΔE 36.5Royal blue · ΔE 37
Nearest named CSS colourDark slateblue (#483D8B)ΔE 12.43, a distinctly different colour
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#715F1D
Analogous#1D5971, #351D71
Triadic#711D2F, #2F711D
Split complementary#71351D, #59711D
Tetradic#711D59, #715F1D, #1D7135

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#7C91DE
Lighter +30%#546FD3
Lighter +20%#3251C2
Lighter +10%#27409A
Darker −10%#131E48
Darker −20%#080D20
Darker −30%#000000
Darker −40%#000000
More saturated +25%#0B2583
Less saturated −25%#2F395F

Channel breakdown

R29
G47
B113
Red29 (11.4%)
Green47 (18.4%)
Blue113 (44.3%)
Hue227.14°
Saturation (HSL)59.15%
Lightness27.84%
Dominant channelBlue
Hex per channelR 1D · G 2F · B 71

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Every value on this page was computed from “1d2f71” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.