Recognised as Colour

#17222F

#17222F
Blue
Dark
Nearest: Black

#17222F is a blue with RGB values 23, 34, 47 and HSL 213°, 34%, 14%. It is a dark colour, so white text on it reaches 16.1:1 contrast (AAA for normal text). The nearest named colour is Black.

Colour values

#17222F#17222F

HEX#17222F

RGBrgb(23, 34, 47)

RGB (0–1)0.0902, 0.1333, 0.1843

RGB percentages9%, 13.3%, 18.4%

HSLhsl(212.5, 34.3%, 13.7%)

HSV / HSBhsv(212.5, 51.1%, 18.4%)

CMYK51.1%, 27.7%, 0%, 81.6%≈naive device-independent conversion; real print needs an ICC profile

24-bit integer1,516,079

CSS custom property--colour: #17222F;

Brightness & contrast

Relative luminance0.01531WCAG 2.x, 0 is black and 1 is white

Perceived brightness33 of 255ITU-R BT.601 weighting

Light or darkDark

Best text colour on this backgroundWhitecontrast 16.08:1

Contrast with white16.08:1WCAG normal text: AAA

Contrast with black1.31:1WCAG normal text: Fail

Greyscale equivalent#212121

Inverted#E8DDD0

Colour vision & accessibility

Normal vision Protanopia Deuteranopia Tritanopia

Protanopia#1D2230no red cones; affects about 1% of men; ΔE 2.5 from the original

Deuteranopia#1A202Fno green cones; the most common form, about 1% of men; ΔE 2.6 from the original

Tritanopia#0E2526no blue cones; rare, and affects men and women equally; ΔE 10.5 from the original

Distinguishable without hueYesnever rely on hue alone to carry meaning

Contrast with white, large text16.08:1WCAG large text: AAA

Contrast with black, large text1.31:1WCAG large text: Fail

Named colours

Black · ΔE 16.3 Dark slate grey · ΔE 22.5 Dim grey · ΔE 33.2 Slate grey · ΔE 40.1 Gray · ΔE 42 Light slate grey · ΔE 43.2

Nearest named CSS colourBlack (#000000)ΔE 16.33, a distinctly different colour

Hue familyblue

CSS keyword usableNo exact keyword

Colour harmonies

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

Complementary#2F2417

Analogous#172E2F, #18172F

Triadic#2F1722, #222F17

Split complementary#2F1817, #2E2F17

Tetradic#2F172E, #2F2417, #172F18

Tints, shades & saturation

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

Lighter +40%#6186B1

Lighter +30%#496C96

Lighter +20%#395473

Lighter +10%#283B51

Darker −10%#06090D

Darker −20%#000000

Darker −30%#000000

Darker −40%#000000

More saturated +25%#0E2138

Less saturated −25%#202326

Channel breakdown

R23

G34

B47

Red23 (9%)

Green34 (13.3%)

Blue47 (18.4%)

Hue212.5°

Saturation (HSL)34.29%

Lightness13.73%

Dominant channelBlue

Hex per channelR 17 · G 22 · B 2F

Keep nerding

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

#17222F

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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