Recognised as Colour

#40668B

#40668B
Blue
Dark
Nearest: Steel blue

#40668B is a blue with RGB values 64, 102, 139 and HSL 210°, 37%, 40%. It is a dark colour, so white text on it reaches 6:1 contrast (AA for normal text). The nearest named colour is Steel blue.

Colour values

#40668B#40668B

HEX#40668B

RGBrgb(64, 102, 139)

RGB (0–1)0.251, 0.4, 0.5451

RGB percentages25.1%, 40%, 54.5%

HSLhsl(209.6, 36.9%, 39.8%)

HSV / HSBhsv(209.6, 54%, 54.5%)

CMYK54%, 26.6%, 0%, 45.5%≈naive device-independent conversion; real print needs an ICC profile

24-bit integer4,220,555

CSS custom property--colour: #40668B;

Brightness & contrast

Relative luminance0.12457WCAG 2.x, 0 is black and 1 is white

Perceived brightness97.6 of 255ITU-R BT.601 weighting

Light or darkDark

Best text colour on this backgroundWhitecontrast 6.01:1

Contrast with white6.01:1WCAG normal text: AA

Contrast with black3.49:1WCAG normal text: Fail

Greyscale equivalent#616161

Inverted#BF9974

Colour vision & accessibility

Normal vision Protanopia Deuteranopia Tritanopia

Protanopia#57678Dno red cones; affects about 1% of men; ΔE 6.7 from the original

Deuteranopia#4D608Ano green cones; the most common form, about 1% of men; ΔE 6.9 from the original

Tritanopia#166F73no blue cones; rare, and affects men and women equally; ΔE 25.7 from the original

Distinguishable without hueYesnever rely on hue alone to carry meaning

Contrast with white, large text6.01:1WCAG large text: AAA

Contrast with black, large text3.49:1WCAG large text: AA

Named colours

Steel blue · ΔE 13.1 Slate grey · ΔE 17.7 Light slate grey · ΔE 19.4 Dim grey · ΔE 24.8 Dark slate grey · ΔE 25.2 Gray · ΔE 27.3

Nearest named CSS colourSteel blue (#4682B4)ΔE 13.15, a distinctly different colour

Hue familyblue

CSS keyword usableNo exact keyword

Colour harmonies

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

Complementary#8B6540

Analogous#408B8B, #40408B

Triadic#8B4066, #668B40

Split complementary#8B4040, #8B8B40

Tetradic#8B408B, #8B6540, #408B40

Tints, shades & saturation

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

Lighter +40%#B8CCDF

Lighter +30%#96B2CE

Lighter +20%#7399BE

Lighter +10%#5080AE

Darker −10%#304C68

Darker −20%#203345

Darker −30%#101922

Darker −40%#000000

More saturated +25%#2766A4

Less saturated −25%#596672

Channel breakdown

R64

G102

B139

Red64 (25.1%)

Green102 (40%)

Blue139 (54.5%)

Hue209.6°

Saturation (HSL)36.95%

Lightness39.8%

Dominant channelBlue

Hex per channelR 40 · G 66 · B 8B

Keep nerding

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

#40668B

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