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Colour

#1D1663

  • #1D1663
  • Blue
  • Dark
  • Nearest: Midnight blue

#1D1663 is a blue with RGB values 29, 22, 99 and HSL 245°, 64%, 24%. It is a dark colour, so white text on it reaches 15.6:1 contrast (AAA for normal text). The nearest named colour is Midnight blue.

Colour values

#1D1663#1D1663
HEX#1D1663
RGBrgb(29, 22, 99)
RGB (0–1)0.1137, 0.0863, 0.3882
RGB percentages11.4%, 8.6%, 38.8%
HSLhsl(245.5, 63.6%, 23.7%)
HSV / HSBhsv(245.5, 77.8%, 38.8%)
CMYK70.7%, 77.8%, 0%, 61.2%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer1,906,275
CSS custom property--colour: #1D1663;

Brightness & contrast

Relative luminance0.01736WCAG 2.x, 0 is black and 1 is white
Perceived brightness40.7 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 15.59:1
Contrast with white15.59:1WCAG normal text: AAA
Contrast with black1.35:1WCAG normal text: Fail
Greyscale equivalent#1D1D1D
Inverted#E2E99C

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#002765no red cones; affects about 1% of men; ΔE 15.1 from the original
Deuteranopia#002062no green cones; the most common form, about 1% of men; ΔE 10.5 from the original
Tritanopia#002C3Bno blue cones; rare, and affects men and women equally; ΔE 48.1 from the original
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text15.59:1WCAG large text: AAA
Contrast with black, large text1.35:1WCAG large text: Fail

Named colours

Midnight blue · ΔE 6.3Dark slateblue · ΔE 17.2Rebecca purple · ΔE 23.4Indigo · ΔE 25Navy · ΔE 27.5Dark blue · ΔE 32.4
Nearest named CSS colourMidnight blue (#191970)ΔE 6.29, clearly different but related
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#5C6316
Analogous#163563, #441663
Triadic#631D16, #16631D
Split complementary#634316, #366316
Tetradic#631635, #5C6316, #166344

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#7268DD
Lighter +30%#4C3ED4
Lighter +20%#3529B6
Lighter +10%#291F8D
Darker −10%#110D39
Darker −20%#050310
Darker −30%#000000
Darker −40%#000000
More saturated +25%#110772
Less saturated −25%#292554

Channel breakdown

R29
G22
B99
Red29 (11.4%)
Green22 (8.6%)
Blue99 (38.8%)
Hue245.45°
Saturation (HSL)63.64%
Lightness23.73%
Dominant channelBlue
Hex per channelR 1D · G 16 · B 63

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Every value on this page was computed from “1d1663” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.