Colour

#040A17

#040A17
Blue
Dark
Nearest: Black

#040A17 is a blue with RGB values 4, 10, 23 and HSL 221°, 70%, 5%. It is a dark colour, so white text on it reaches 19.8:1 contrast (AAA for normal text). The nearest named colour is Black.

Colour values

#040A17#040A17

HEX#040A17

RGBrgb(4, 10, 23)

RGB (0–1)0.0157, 0.0392, 0.0902

RGB percentages1.6%, 3.9%, 9%

HSLhsl(221.1, 70.4%, 5.3%)

HSV / HSBhsv(221.1, 82.6%, 9%)

CMYK82.6%, 56.5%, 0%, 91%≈naive device-independent conversion; real print needs an ICC profile

24-bit integer264,727

CSS custom property--colour: #040A17;

Brightness & contrast

Relative luminance0.00305WCAG 2.x, 0 is black and 1 is white

Perceived brightness11.1 of 255ITU-R BT.601 weighting

Light or darkDark

Best text colour on this backgroundWhitecontrast 19.79:1

Contrast with white19.79:1WCAG normal text: AAA

Contrast with black1.06:1WCAG normal text: Fail

Greyscale equivalent#0A0A0A

Inverted#FBF5E8

Colour vision & accessibility

Normal vision Protanopia Deuteranopia Tritanopia

Protanopia#050B18no red cones; affects about 1% of men; ΔE 0.4 from the original

Deuteranopia#040917no green cones; the most common form, about 1% of men; ΔE 0.5 from the original

Tritanopia#000D0Fno blue cones; rare, and affects men and women equally; ΔE 6.7 from the original

Distinguishable without hueYesnever rely on hue alone to carry meaning

Contrast with white, large text19.79:1WCAG large text: AAA

Contrast with black, large text1.06:1WCAG large text: Fail

Named colours

Black · ΔE 8 Dark slate grey · ΔE 31.4 Dim grey · ΔE 42.3 Slate grey · ΔE 50.3 Dark slateblue · ΔE 51.2 Gray · ΔE 51.4

Nearest named CSS colourBlack (#000000)ΔE 8, clearly different but related

Hue familyblue

CSS keyword usableNo exact keyword

Colour harmonies

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

Complementary#171104

Analogous#041317, #080417

Triadic#17040A, #0A1704

Split complementary#170804, #131704

Tetradic#170413, #171104, #041708

Tints, shades & saturation

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

Lighter +40%#2256C5

Lighter +30%#1B4399

Lighter +20%#13306E

Lighter +10%#0C1D42

Darker −10%#000000

Darker −20%#000000

Darker −30%#000000

Darker −40%#000000

More saturated +25%#01091A

Less saturated −25%#070B14

Channel breakdown

G10

B23

Red4 (1.6%)

Green10 (3.9%)

Blue23 (9%)

Hue221.05°

Saturation (HSL)70.37%

Lightness5.29%

Dominant channelBlue

Hex per channelR 04 · G 0A · B 17

Keep nerding

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

#040A17

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

Nerdulate something else