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Recognised as Colour

#1B0043

  • #1B0043
  • Violet
  • Dark
  • Nearest: Midnight blue

#1B0043 is a violet with RGB values 27, 0, 67 and HSL 264°, 100%, 13%. It is a dark colour, so white text on it reaches 18.6:1 contrast (AAA for normal text). The nearest named colour is Midnight blue.

Colour values

#1B0043#1B0043
HEX#1B0043
RGBrgb(27, 0, 67)
RGB (0–1)0.1059, 0, 0.2627
RGB percentages10.6%, 0%, 26.3%
HSLhsl(264.2, 100%, 13.1%)
HSV / HSBhsv(264.2, 100%, 26.3%)
CMYK59.7%, 100%, 0%, 73.7%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer1,769,539
CSS custom property--colour: #1B0043;

Brightness & contrast

Relative luminance0.00638WCAG 2.x, 0 is black and 1 is white
Perceived brightness27 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 18.62:1
Contrast with white18.62:1WCAG normal text: AAA
Contrast with black1.13:1WCAG normal text: Fail
Greyscale equivalent#0B0B0B
Inverted#E4FFBC

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#001445no red cones; affects about 1% of men; ΔE 15.9 from the original
Deuteranopia#001142no green cones; the most common form, about 1% of men; ΔE 15 from the original
Tritanopia#0C1523no blue cones; rare, and affects men and women equally; ΔE 38.7 from the original
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text18.62:1WCAG large text: AAA
Contrast with black, large text1.13:1WCAG large text: Fail

Named colours

Midnight blue · ΔE 17.2Dark slateblue · ΔE 26.3Indigo · ΔE 31.1Rebecca purple · ΔE 31.9Navy · ΔE 34.3Purple · ΔE 37.1
Nearest named CSS colourMidnight blue (#191970)ΔE 17.15, a distinctly different colour
Hue familyviolet
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#284300
Analogous#000743, #3C0043
Triadic#431B00, #00431B
Split complementary#433C00, #074300
Tetradic#430007, #284300, #00433C

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#7010FF
Lighter +30%#5900DC
Lighter +20%#4400A9
Lighter +10%#300076
Darker −10%#060010
Darker −20%#000000
Darker −30%#000000
Darker −40%#000000
More saturated +25%#1B0043
Less saturated −25%#1D083B

Channel breakdown

R27
G0
B67
Red27 (10.6%)
Green0 (0%)
Blue67 (26.3%)
Hue264.18°
Saturation (HSL)100%
Lightness13.14%
Dominant channelBlue
Hex per channelR 1B · G 00 · B 43

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Every value on this page was computed from “1b0043” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.