Colour

#040F37

#040F37
Blue
Dark
Nearest: Black

#040F37 is a blue with RGB values 4, 15, 55 and HSL 227°, 86%, 12%. It is a dark colour, so white text on it reaches 18.6:1 contrast (AAA for normal text). The nearest named colour is Black.

Colour values

#040F37#040F37

HEX#040F37

RGBrgb(4, 15, 55)

RGB (0–1)0.0157, 0.0588, 0.2157

RGB percentages1.6%, 5.9%, 21.6%

HSLhsl(227.1, 86.4%, 11.6%)

HSV / HSBhsv(227.1, 92.7%, 21.6%)

CMYK92.7%, 72.7%, 0%, 78.4%≈naive device-independent conversion; real print needs an ICC profile

24-bit integer266,039

CSS custom property--colour: #040F37;

Brightness & contrast

Relative luminance0.00643WCAG 2.x, 0 is black and 1 is white

Perceived brightness21.9 of 255ITU-R BT.601 weighting

Light or darkDark

Best text colour on this backgroundWhitecontrast 18.61:1

Contrast with white18.61:1WCAG normal text: AAA

Contrast with black1.13:1WCAG normal text: Fail

Greyscale equivalent#101010

Inverted#FBF0C8

Colour vision & accessibility

Normal vision Protanopia Deuteranopia Tritanopia

Protanopia#001538no red cones; affects about 1% of men; ΔE 4.9 from the original

Deuteranopia#001036no green cones; the most common form, about 1% of men; ΔE 2.2 from the original

Tritanopia#001921no blue cones; rare, and affects men and women equally; ΔE 26 from the original

Distinguishable without hueYesnever rely on hue alone to carry meaning

Contrast with white, large text18.61:1WCAG large text: AAA

Contrast with black, large text1.13:1WCAG large text: Fail

Named colours

Black · ΔE 30.3 Midnight blue · ΔE 31.4 Dark slateblue · ΔE 32.3 Dark slate grey · ΔE 42 Rebecca purple · ΔE 45.6 Dim grey · ΔE 48.7

Nearest named CSS colourBlack (#000000)ΔE 30.29, a distinctly different colour

Hue familyblue

CSS keyword usableNo exact keyword

Colour harmonies

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

Complementary#372C04

Analogous#042937, #120437

Triadic#37040F, #0F3704

Split complementary#371304, #283704

Tetradic#370429, #372C04, #043712

Tints, shades & saturation

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

Lighter +40%#1947EE

Lighter +30%#0E36C6

Lighter +20%#0B2996

Lighter +10%#071C67

Darker −10%#010207

Darker −20%#000000

Darker −30%#000000

Darker −40%#000000

More saturated +25%#000D3B

Less saturated −25%#0B1330

Channel breakdown

G15

B55

Red4 (1.6%)

Green15 (5.9%)

Blue55 (21.6%)

Hue227.06°

Saturation (HSL)86.44%

Lightness11.57%

Dominant channelBlue

Hex per channelR 04 · G 0F · B 37

Keep nerding

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#040F37

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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