Recognised as Colour

#1B1B3F

#1B1B3F
Blue
Dark
Nearest: Black

#1B1B3F is a blue with RGB values 27, 27, 63 and HSL 240°, 40%, 18%. It is a dark colour, so white text on it reaches 16.5:1 contrast (AAA for normal text). The nearest named colour is Black.

Colour values

#1B1B3F#1B1B3F

HEX#1B1B3F

RGBrgb(27, 27, 63)

RGB (0–1)0.1059, 0.1059, 0.2471

RGB percentages10.6%, 10.6%, 24.7%

HSLhsl(240, 40%, 17.6%)

HSV / HSBhsv(240, 57.1%, 24.7%)

CMYK57.1%, 57.1%, 0%, 75.3%≈naive device-independent conversion; real print needs an ICC profile

24-bit integer1,776,447

CSS custom property--colour: #1B1B3F;

Brightness & contrast

Relative luminance0.01376WCAG 2.x, 0 is black and 1 is white

Perceived brightness33.1 of 255ITU-R BT.601 weighting

Light or darkDark

Best text colour on this backgroundWhitecontrast 16.47:1

Contrast with white16.47:1WCAG normal text: AAA

Contrast with black1.28:1WCAG normal text: Fail

Greyscale equivalent#1E1E1E

Inverted#E4E4C0

Colour vision & accessibility

Normal vision Protanopia Deuteranopia Tritanopia

Protanopia#0A2040no red cones; affects about 1% of men; ΔE 7.2 from the original

Deuteranopia#071E3Eno green cones; the most common form, about 1% of men; ΔE 7 from the original

Tritanopia#0D232Ano blue cones; rare, and affects men and women equally; ΔE 24 from the original

Distinguishable without hueYesnever rely on hue alone to carry meaning

Contrast with white, large text16.47:1WCAG large text: AAA

Contrast with black, large text1.28:1WCAG large text: Fail

Named colours

Black · ΔE 28.6 Dark slateblue · ΔE 30.3 Midnight blue · ΔE 33.3 Dark slate grey · ΔE 36.3 Dim grey · ΔE 41.7 Rebecca purple · ΔE 44.5

Nearest named CSS colourBlack (#000000)ΔE 28.57, a distinctly different colour

Hue familyblue

CSS keyword usableNo exact keyword

Colour harmonies

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

Complementary#3F3F1B

Analogous#1B2D3F, #2D1B3F

Triadic#3F1B1B, #1B3F1B

Split complementary#3F2D1B, #2D3F1B

Tetradic#3F1B2D, #3F3F1B, #1B3F2D

Tints, shades & saturation

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

Lighter +40%#6868BE

Lighter +30%#4949AA

Lighter +20%#3A3A86

Lighter +10%#2A2A63

Darker −10%#0C0C1B

Darker −20%#000000

Darker −30%#000000

Darker −40%#000000

More saturated +25%#10104A

Less saturated −25%#262634

Channel breakdown

R27

G27

B63

Red27 (10.6%)

Green27 (10.6%)

Blue63 (24.7%)

Hue240°

Saturation (HSL)40%

Lightness17.65%

Dominant channelBlue

Hex per channelR 1B · G 1B · B 3F

Keep nerding

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

#1B1B3F

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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