Recognised as Colour

#1B3161

#1B3161
Blue
Dark
Nearest: Dark slateblue

#1B3161 is a blue with RGB values 27, 49, 97 and HSL 221°, 56%, 24%. It is a dark colour, so white text on it reaches 12.7:1 contrast (AAA for normal text). The nearest named colour is Dark slateblue.

Colour values

#1B3161#1B3161

HEX#1B3161

RGBrgb(27, 49, 97)

RGB (0–1)0.1059, 0.1922, 0.3804

RGB percentages10.6%, 19.2%, 38%

HSLhsl(221.1, 56.5%, 24.3%)

HSV / HSBhsv(221.1, 72.2%, 38%)

CMYK72.2%, 49.5%, 0%, 62%≈naive device-independent conversion; real print needs an ICC profile

24-bit integer1,782,113

CSS custom property--colour: #1B3161;

Brightness & contrast

Relative luminance0.03293WCAG 2.x, 0 is black and 1 is white

Perceived brightness52 of 255ITU-R BT.601 weighting

Light or darkDark

Best text colour on this backgroundWhitecontrast 12.66:1

Contrast with white12.66:1WCAG normal text: AAA

Contrast with black1.66:1WCAG normal text: Fail

Greyscale equivalent#303030

Inverted#E4CE9E

Colour vision & accessibility

Normal vision Protanopia Deuteranopia Tritanopia

Protanopia#193663no red cones; affects about 1% of men; ΔE 3.7 from the original

Deuteranopia#0B3060no green cones; the most common form, about 1% of men; ΔE 2.4 from the original

Tritanopia#003C44no blue cones; rare, and affects men and women equally; ΔE 31.6 from the original

Distinguishable without hueYesnever rely on hue alone to carry meaning

Contrast with white, large text12.66:1WCAG large text: AAA

Contrast with black, large text1.66:1WCAG large text: Fail

Named colours

Dark slateblue · ΔE 22.2 Midnight blue · ΔE 29.5 Steel blue · ΔE 34 Dark slate grey · ΔE 36 Black · ΔE 38.8 Rebecca purple · ΔE 39

Nearest named CSS colourDark slateblue (#483D8B)ΔE 22.22, a distinctly different colour

Hue familyblue

CSS keyword usableNo exact keyword

Colour harmonies

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

Complementary#614B1B

Analogous#1B5461, #281B61

Triadic#611B31, #31611B

Split complementary#61281B, #54611B

Tetradic#611B54, #614B1B, #1B6128

Tints, shades & saturation

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

Lighter +40%#7191D7

Lighter +30%#4972CC

Lighter +20%#3159B1

Lighter +10%#264589

Darker −10%#101D39

Darker −20%#050911

Darker −30%#000000

Darker −40%#000000

More saturated +25%#0C2B71

Less saturated −25%#2B3752

Channel breakdown

R27

G49

B97

Red27 (10.6%)

Green49 (19.2%)

Blue97 (38%)

Hue221.14°

Saturation (HSL)56.45%

Lightness24.31%

Dominant channelBlue

Hex per channelR 1B · G 31 · B 61

Keep nerding

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

#1B3161

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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