Colour

#171D2A

#171D2A
Blue
Dark
Nearest: Black

#171D2A is a blue with RGB values 23, 29, 42 and HSL 221°, 29%, 13%. It is a dark colour, so white text on it reaches 16.9:1 contrast (AAA for normal text). The nearest named colour is Black.

Colour values

#171D2A#171D2A

HEX#171D2A

RGBrgb(23, 29, 42)

RGB (0–1)0.0902, 0.1137, 0.1647

RGB percentages9%, 11.4%, 16.5%

HSLhsl(221.1, 29.2%, 12.7%)

HSV / HSBhsv(221.1, 45.2%, 16.5%)

CMYK45.2%, 31%, 0%, 83.5%≈naive device-independent conversion; real print needs an ICC profile

24-bit integer1,514,794

CSS custom property--colour: #171D2A;

Brightness & contrast

Relative luminance0.01228WCAG 2.x, 0 is black and 1 is white

Perceived brightness29.2 of 255ITU-R BT.601 weighting

Light or darkDark

Best text colour on this backgroundWhitecontrast 16.86:1

Contrast with white16.86:1WCAG normal text: AAA

Contrast with black1.25:1WCAG normal text: Fail

Greyscale equivalent#1D1D1D

Inverted#E8E2D5

Colour vision & accessibility

Normal vision Protanopia Deuteranopia Tritanopia

Protanopia#191E2Bno red cones; affects about 1% of men; ΔE 0.7 from the original

Deuteranopia#171C2Ano green cones; the most common form, about 1% of men; ΔE 1 from the original

Tritanopia#112021no blue cones; rare, and affects men and women equally; ΔE 10.2 from the original

Distinguishable without hueYesnever rely on hue alone to carry meaning

Contrast with white, large text16.86:1WCAG large text: AAA

Contrast with black, large text1.25:1WCAG large text: Fail

Named colours

Black · ΔE 14.5 Dark slate grey · ΔE 25 Dim grey · ΔE 35 Slate grey · ΔE 42.2 Gray · ΔE 43.9 Light slate grey · ΔE 45.3

Nearest named CSS colourBlack (#000000)ΔE 14.52, a distinctly different colour

Hue familyblue

CSS keyword usableNo exact keyword

Colour harmonies

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

Complementary#2A2417

Analogous#17262A, #1B172A

Triadic#2A171D, #1D2A17

Split complementary#2A1B17, #262A17

Tetradic#2A1726, #2A2417, #172A1B

Tints, shades & saturation

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

Lighter +40%#637AAA

Lighter +30%#4D618D

Lighter +20%#3B4B6C

Lighter +10%#29344B

Darker −10%#050609

Darker −20%#000000

Darker −30%#000000

Darker −40%#000000

More saturated +25%#0F1A32

Less saturated −25%#1F2022

Channel breakdown

R23

G29

B42

Red23 (9%)

Green29 (11.4%)

Blue42 (16.5%)

Hue221.05°

Saturation (HSL)29.23%

Lightness12.75%

Dominant channelBlue

Hex per channelR 17 · G 1D · B 2A

Keep nerding

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

#171D2A

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