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Colour

#1D309E

  • #1D309E
  • Blue
  • Dark
  • Nearest: Midnight blue

#1D309E is a blue with RGB values 29, 48, 158 and HSL 231°, 69%, 37%. It is a dark colour, so white text on it reaches 10.7:1 contrast (AAA for normal text). The nearest named colour is Midnight blue.

Colour values

#1D309E#1D309E
HEX#1D309E
RGBrgb(29, 48, 158)
RGB (0–1)0.1137, 0.1882, 0.6196
RGB percentages11.4%, 18.8%, 62%
HSLhsl(231.2, 69%, 36.7%)
HSV / HSBhsv(231.2, 81.6%, 62%)
CMYK81.6%, 69.6%, 0%, 38%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer1,912,990
CSS custom property--colour: #1D309E;

Brightness & contrast

Relative luminance0.04844WCAG 2.x, 0 is black and 1 is white
Perceived brightness66.7 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 10.67:1
Contrast with white10.67:1WCAG normal text: AAA
Contrast with black1.97:1WCAG normal text: Fail
Greyscale equivalent#343434
Inverted#E2CF61

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#0044A1no red cones; affects about 1% of men; ΔE 16 from the original
Deuteranopia#00389Cno green cones; the most common form, about 1% of men; ΔE 8.4 from the original
Tritanopia#004E63no blue cones; rare, and affects men and women equally; ΔE 63.8 from the original
Distinguishable without hueShifts in lightness toonever rely on hue alone to carry meaning
Contrast with white, large text10.67:1WCAG large text: AAA
Contrast with black, large text1.97:1WCAG large text: Fail

Named colours

Midnight blue · ΔE 15.9Rebecca purple · ΔE 17.7Navy · ΔE 19Slate blue · ΔE 19.4Indigo · ΔE 19.9Dark blue · ΔE 21.1
Nearest named CSS colourMidnight blue (#191970)ΔE 15.89, a distinctly different colour
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#9E8B1D
Analogous#1D719E, #4A1D9E
Triadic#9E1D30, #309E1D
Split complementary#9E4B1D, #709E1D
Tetradic#9E1D71, #9E8B1D, #1D9E4B

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#9AA7ED
Lighter +30%#6F81E5
Lighter +20%#445BDD
Lighter +10%#253DC9
Darker −10%#152373
Darker −20%#0D1648
Darker −30%#05091D
Darker −40%#000000
More saturated +25%#0620B5
Less saturated −25%#344087

Channel breakdown

R29
G48
B158
Red29 (11.4%)
Green48 (18.8%)
Blue158 (62%)
Hue231.16°
Saturation (HSL)68.98%
Lightness36.67%
Dominant channelBlue
Hex per channelR 1D · G 30 · B 9E

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Every value on this page was computed from “1d309e” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.