Colour

#17191D

#17191D
Blue
Dark
Nearest: Black

#17191D is a blue with RGB values 23, 25, 29 and HSL 220°, 12%, 10%. It is a dark colour, so white text on it reaches 17.6:1 contrast (AAA for normal text). The nearest named colour is Black.

Colour values

#17191D#17191D

HEX#17191D

RGBrgb(23, 25, 29)

RGB (0–1)0.0902, 0.098, 0.1137

RGB percentages9%, 9.8%, 11.4%

HSLhsl(220, 11.5%, 10.2%)

HSV / HSBhsv(220, 20.7%, 11.4%)

CMYK20.7%, 13.8%, 0%, 88.6%≈naive device-independent conversion; real print needs an ICC profile

24-bit integer1,513,757

CSS custom property--colour: #17191D;

Brightness & contrast

Relative luminance0.00966WCAG 2.x, 0 is black and 1 is white

Perceived brightness24.9 of 255ITU-R BT.601 weighting

Light or darkDark

Best text colour on this backgroundWhitecontrast 17.6:1

Contrast with white17.6:1WCAG normal text: AAA

Contrast with black1.19:1WCAG normal text: Fail

Greyscale equivalent#191919

Inverted#E8E6E2

Colour vision & accessibility

Normal vision Protanopia Deuteranopia Tritanopia

Protanopia#18191Dno red cones; affects about 1% of men; ΔE 0.5 from the original

Deuteranopia#17191Dno green cones; the most common form, about 1% of men; ΔE 0 from the original

Tritanopia#161A1Ano blue cones; rare, and affects men and women equally; ΔE 3.2 from the original

Distinguishable without hueYesnever rely on hue alone to carry meaning

Contrast with white, large text17.6:1WCAG large text: AAA

Contrast with black, large text1.19:1WCAG large text: Fail

Named colours

Black · ΔE 9.2 Dark slate grey · ΔE 25.5 Dim grey · ΔE 35.8 Slate grey · ΔE 44.8 Gray · ΔE 45 Light slate grey · ΔE 47.9

Nearest named CSS colourBlack (#000000)ΔE 9.25, clearly different but related

Hue familyblue

CSS keyword usableNo exact keyword

Colour harmonies

base +30°+90°+120°+180°+210°+240°+270°+330°

Complementary#1D1B17

Analogous#171C1D, #18171D

Triadic#1D1719, #191D17

Split complementary#1D1817, #1C1D17

Tetradic#1D171C, #1D1B17, #171D18

Tints, shades & saturation

+40%+30%+20%+10%base -10%-20%-30%-40%

Lighter +40%#717B8F

Lighter +30%#5B6372

Lighter +20%#444A56

Lighter +10%#2E3239

Darker −10%#000001

Darker −20%#000000

Darker −30%#000000

Darker −40%#000000

More saturated +25%#111724

Less saturated −25%#1A1A1A

Channel breakdown

R23

G25

B29

Red23 (9%)

Green25 (9.8%)

Blue29 (11.4%)

Hue220°

Saturation (HSL)11.54%

Lightness10.2%

Dominant channelBlue

Hex per channelR 17 · G 19 · B 1D

Keep nerding

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#17191D

Colour values

Brightness & contrast

Colour vision & accessibility

Named colours

Colour harmonies

Tints, shades & saturation

Channel breakdown

Keep nerding

Harmonies

Lighter and darker

Similar named colours

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