Colour

#231F40

#231F40
Blue
Dark
Nearest: Black

#231F40 is a blue with RGB values 35, 31, 64 and HSL 247°, 35%, 19%. It is a dark colour, so white text on it reaches 15.7:1 contrast (AAA for normal text). The nearest named colour is Black.

Colour values

#231F40#231F40

HEX#231F40

RGBrgb(35, 31, 64)

RGB (0–1)0.1373, 0.1216, 0.251

RGB percentages13.7%, 12.2%, 25.1%

HSLhsl(247.3, 34.7%, 18.6%)

HSV / HSBhsv(247.3, 51.6%, 25.1%)

CMYK45.3%, 51.6%, 0%, 74.9%≈naive device-independent conversion; real print needs an ICC profile

24-bit integer2,301,760

CSS custom property--colour: #231F40;

Brightness & contrast

Relative luminance0.01707WCAG 2.x, 0 is black and 1 is white

Perceived brightness37.4 of 255ITU-R BT.601 weighting

Light or darkDark

Best text colour on this backgroundWhitecontrast 15.65:1

Contrast with white15.65:1WCAG normal text: AAA

Contrast with black1.34:1WCAG normal text: Fail

Greyscale equivalent#222222

Inverted#DCE0BF

Colour vision & accessibility

Normal vision Protanopia Deuteranopia Tritanopia

Protanopia#132441no red cones; affects about 1% of men; ΔE 7.8 from the original

Deuteranopia#13223Fno green cones; the most common form, about 1% of men; ΔE 7.1 from the original

Tritanopia#1B262Cno blue cones; rare, and affects men and women equally; ΔE 20.9 from the original

Distinguishable without hueYesnever rely on hue alone to carry meaning

Contrast with white, large text15.65:1WCAG large text: AAA

Contrast with black, large text1.34:1WCAG large text: Fail

Named colours

Black · ΔE 27.3 Dark slateblue · ΔE 31 Dark slate grey · ΔE 33.6 Midnight blue · ΔE 35.4 Dim grey · ΔE 38.6 Slate grey · ΔE 42.5

Nearest named CSS colourBlack (#000000)ΔE 27.35, a distinctly different colour

Hue familyblue

CSS keyword usableNo exact keyword

Colour harmonies

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

Complementary#3C401F

Analogous#1F2C40, #341F40

Triadic#40231F, #1F4023

Split complementary#40331F, #2C401F

Tetradic#401F2C, #3C401F, #1F4033

Tints, shades & saturation

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

Lighter +40%#7A71BA

Lighter +30%#5B51A7

Lighter +20%#494085

Lighter +10%#363062

Darker −10%#100E1E

Darker −20%#000000

Darker −30%#000000

Darker −40%#000000

More saturated +25%#1A134C

Less saturated −25%#2C2B34

Channel breakdown

R35

G31

B64

Red35 (13.7%)

Green31 (12.2%)

Blue64 (25.1%)

Hue247.27°

Saturation (HSL)34.74%

Lightness18.63%

Dominant channelBlue

Hex per channelR 23 · G 1F · B 40

Keep nerding

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

#231F40

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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