Recognised as Colour

#171F2F

#171F2F
Blue
Dark
Nearest: Black

#171F2F is a blue with RGB values 23, 31, 47 and HSL 220°, 34%, 14%. It is a dark colour, so white text on it reaches 16.5:1 contrast (AAA for normal text). The nearest named colour is Black.

Colour values

#171F2F#171F2F

HEX#171F2F

RGBrgb(23, 31, 47)

RGB (0–1)0.0902, 0.1216, 0.1843

RGB percentages9%, 12.2%, 18.4%

HSLhsl(220, 34.3%, 13.7%)

HSV / HSBhsv(220, 51.1%, 18.4%)

CMYK51.1%, 34%, 0%, 81.6%≈naive device-independent conversion; real print needs an ICC profile

24-bit integer1,515,311

CSS custom property--colour: #171F2F;

Brightness & contrast

Relative luminance0.01367WCAG 2.x, 0 is black and 1 is white

Perceived brightness31.2 of 255ITU-R BT.601 weighting

Light or darkDark

Best text colour on this backgroundWhitecontrast 16.49:1

Contrast with white16.49:1WCAG normal text: AAA

Contrast with black1.27:1WCAG normal text: Fail

Greyscale equivalent#1E1E1E

Inverted#E8E0D0

Colour vision & accessibility

Normal vision Protanopia Deuteranopia Tritanopia

Protanopia#192030no red cones; affects about 1% of men; ΔE 0.7 from the original

Deuteranopia#171E2Fno green cones; the most common form, about 1% of men; ΔE 1 from the original

Tritanopia#0F2225no blue cones; rare, and affects men and women equally; ΔE 11.2 from the original

Distinguishable without hueYesnever rely on hue alone to carry meaning

Contrast with white, large text16.49:1WCAG large text: AAA

Contrast with black, large text1.27:1WCAG large text: Fail

Named colours

Black · ΔE 16.7 Dark slate grey · ΔE 25 Dim grey · ΔE 34.8 Slate grey · ΔE 41.3 Dark slateblue · ΔE 43.3 Gray · ΔE 43.5

Nearest named CSS colourBlack (#000000)ΔE 16.71, a distinctly different colour

Hue familyblue

CSS keyword usableNo exact keyword

Colour harmonies

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

Complementary#2F2717

Analogous#172B2F, #1B172F

Triadic#2F171F, #1F2F17

Split complementary#2F1B17, #2B2F17

Tetradic#2F172B, #2F2717, #172F1B

Tints, shades & saturation

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

Lighter +40%#617CB1

Lighter +30%#496396

Lighter +20%#394C73

Lighter +10%#283651

Darker −10%#06080D

Darker −20%#000000

Darker −30%#000000

Darker −40%#000000

More saturated +25%#0E1C38

Less saturated −25%#202226

Channel breakdown

R23

G31

B47

Red23 (9%)

Green31 (12.2%)

Blue47 (18.4%)

Hue220°

Saturation (HSL)34.29%

Lightness13.73%

Dominant channelBlue

Hex per channelR 17 · G 1F · B 2F

Keep nerding

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

#171F2F

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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