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Recognised as Colour

#1A171B

  • #1A171B
  • Violet
  • Dark
  • Nearest: Black

#1A171B is a violet with RGB values 26, 23, 27 and HSL 285°, 8%, 10%. It is a dark colour, so white text on it reaches 17.8:1 contrast (AAA for normal text). The nearest named colour is Black.

Colour values

#1A171B#1A171B
HEX#1A171B
RGBrgb(26, 23, 27)
RGB (0–1)0.102, 0.0902, 0.1059
RGB percentages10.2%, 9%, 10.6%
HSLhsl(285, 8%, 9.8%)
HSV / HSBhsv(285, 14.8%, 10.6%)
CMYK3.7%, 14.8%, 0%, 89.4%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer1,709,851
CSS custom property--colour: #1A171B;

Brightness & contrast

Relative luminance0.00912WCAG 2.x, 0 is black and 1 is white
Perceived brightness24.4 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 17.76:1
Contrast with white17.76:1WCAG normal text: AAA
Contrast with black1.18:1WCAG normal text: Fail
Greyscale equivalent#181818
Inverted#E5E8E4

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#17181Bno red cones; affects about 1% of men; ΔE 2.2 from the original
Deuteranopia#17181Bno green cones; the most common form, about 1% of men; ΔE 2.2 from the original
Tritanopia#1A1718no blue cones; rare, and affects men and women equally; ΔE 2.2 from the original
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text17.76:1WCAG large text: AAA
Contrast with black, large text1.18:1WCAG large text: Fail

Named colours

Black · ΔE 8.9Dark slate grey · ΔE 27.1Dim grey · ΔE 36.3Gray · ΔE 45.5Slate grey · ΔE 45.6Light slate grey · ΔE 48.7
Nearest named CSS colourBlack (#000000)ΔE 8.9, clearly different but related
Hue familyviolet
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#181B17
Analogous#18171B, #1B171A
Triadic#1B1A17, #171B1A
Split complementary#1A1B17, #171B18
Tetradic#1B1817, #181B17, #171A1B

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#847589
Lighter +30%#6A5D6E
Lighter +20%#4F4652
Lighter +10%#352E37
Darker −10%#000000
Darker −20%#000000
Darker −30%#000000
Darker −40%#000000
More saturated +25%#1D1121
Less saturated −25%#191919

Channel breakdown

R26
G23
B27
Red26 (10.2%)
Green23 (9%)
Blue27 (10.6%)
Hue285°
Saturation (HSL)8%
Lightness9.8%
Dominant channelBlue
Hex per channelR 1A · G 17 · B 1B

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Every value on this page was computed from “1a171b” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.