Colour

#171B1F

#171B1F
Blue
Dark
Nearest: Black

#171B1F is a blue with RGB values 23, 27, 31 and HSL 210°, 15%, 11%. It is a dark colour, so white text on it reaches 17.3:1 contrast (AAA for normal text). The nearest named colour is Black.

Colour values

#171B1F#171B1F

HEX#171B1F

RGBrgb(23, 27, 31)

RGB (0–1)0.0902, 0.1059, 0.1216

RGB percentages9%, 10.6%, 12.2%

HSLhsl(210, 14.8%, 10.6%)

HSV / HSBhsv(210, 25.8%, 12.2%)

CMYK25.8%, 12.9%, 0%, 87.8%≈naive device-independent conversion; real print needs an ICC profile

24-bit integer1,514,271

CSS custom property--colour: #171B1F;

Brightness & contrast

Relative luminance0.01065WCAG 2.x, 0 is black and 1 is white

Perceived brightness26.4 of 255ITU-R BT.601 weighting

Light or darkDark

Best text colour on this backgroundWhitecontrast 17.31:1

Contrast with white17.31:1WCAG normal text: AAA

Contrast with black1.21:1WCAG normal text: Fail

Greyscale equivalent#1A1A1A

Inverted#E8E4E0

Colour vision & accessibility

Normal vision Protanopia Deuteranopia Tritanopia

Protanopia#1A1B1Fno red cones; affects about 1% of men; ΔE 1.4 from the original

Deuteranopia#191A1Fno green cones; the most common form, about 1% of men; ΔE 1.6 from the original

Tritanopia#151C1Cno blue cones; rare, and affects men and women equally; ΔE 3.4 from the original

Distinguishable without hueYesnever rely on hue alone to carry meaning

Contrast with white, large text17.31:1WCAG large text: AAA

Contrast with black, large text1.21:1WCAG large text: Fail

Named colours

Black · ΔE 10.1 Dark slate grey · ΔE 24.4 Dim grey · ΔE 35.1 Slate grey · ΔE 43.9 Gray · ΔE 44.2 Light slate grey · ΔE 47.1

Nearest named CSS colourBlack (#000000)ΔE 10.13, a distinctly different colour

Hue familyblue

CSS keyword usableNo exact keyword

Colour harmonies

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

Complementary#1F1B17

Analogous#171F1F, #17171F

Triadic#1F171B, #1B1F17

Split complementary#1F1717, #1F1F17

Tetradic#1F171F, #1F1B17, #171F17

Tints, shades & saturation

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

Lighter +40%#6E8194

Lighter +30%#586877

Lighter +20%#424E5A

Lighter +10%#2D353C

Darker −10%#010102

Darker −20%#000000

Darker −30%#000000

Darker −40%#000000

More saturated +25%#101B26

Less saturated −25%#1B1B1B

Channel breakdown

R23

G27

B31

Red23 (9%)

Green27 (10.6%)

Blue31 (12.2%)

Hue210°

Saturation (HSL)14.81%

Lightness10.59%

Dominant channelBlue

Hex per channelR 17 · G 1B · B 1F

Keep nerding

Every link below is a page Nerdulator can generate from what it already knows about this value.

#171B1F

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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