Colour

#18181F

#18181F
Blue
Dark
Nearest: Black

#18181F is a blue with RGB values 24, 24, 31 and HSL 240°, 13%, 11%. It is a dark colour, so white text on it reaches 17.7:1 contrast (AAA for normal text). The nearest named colour is Black.

Colour values

#18181F#18181F

HEX#18181F

RGBrgb(24, 24, 31)

RGB (0–1)0.0941, 0.0941, 0.1216

RGB percentages9.4%, 9.4%, 12.2%

HSLhsl(240, 12.7%, 10.8%)

HSV / HSBhsv(240, 22.6%, 12.2%)

CMYK22.6%, 22.6%, 0%, 87.8%≈naive device-independent conversion; real print needs an ICC profile

24-bit integer1,579,039

CSS custom property--colour: #18181F;

Brightness & contrast

Relative luminance0.00946WCAG 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 17.66:1

Contrast with white17.66:1WCAG normal text: AAA

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

Greyscale equivalent#191919

Inverted#E7E7E0

Colour vision & accessibility

Normal vision Protanopia Deuteranopia Tritanopia

Protanopia#16191Fno red cones; affects about 1% of men; ΔE 1.6 from the original

Deuteranopia#16181Fno green cones; the most common form, about 1% of men; ΔE 1 from the original

Tritanopia#17191Ano blue cones; rare, and affects men and women equally; ΔE 4.7 from the original

Distinguishable without hueYesnever rely on hue alone to carry meaning

Contrast with white, large text17.66:1WCAG large text: AAA

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

Named colours

Black · ΔE 10 Dark slate grey · ΔE 26.5 Dim grey · ΔE 36.3 Slate grey · ΔE 44.9 Gray · ΔE 45.4 Light slate grey · ΔE 48

Nearest named CSS colourBlack (#000000)ΔE 10.02, a distinctly different colour

Hue familyblue

CSS keyword usableNo exact keyword

Colour harmonies

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

Complementary#1F1F18

Analogous#181C1F, #1C181F

Triadic#1F1818, #181F18

Split complementary#1F1C18, #1C1F18

Tetradic#1F181C, #1F1F18, #181F1C

Tints, shades & saturation

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

Lighter +40%#727291

Lighter +30%#5B5B75

Lighter +20%#454558

Lighter +10%#2E2E3C

Darker −10%#020202

Darker −20%#000000

Darker −30%#000000

Darker −40%#000000

More saturated +25%#111126

Less saturated −25%#1C1C1C

Channel breakdown

R24

G24

B31

Red24 (9.4%)

Green24 (9.4%)

Blue31 (12.2%)

Hue240°

Saturation (HSL)12.73%

Lightness10.78%

Dominant channelBlue

Hex per channelR 18 · G 18 · B 1F

Keep nerding

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

#18181F

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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