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Colour

#163D51

  • #163D51
  • Blue
  • Dark
  • Nearest: Dark slate grey

#163D51 is a blue with RGB values 22, 61, 81 and HSL 200°, 57%, 20%. It is a dark colour, so white text on it reaches 11.5:1 contrast (AAA for normal text). The nearest named colour is Dark slate grey.

Colour values

#163D51#163D51
HEX#163D51
RGBrgb(22, 61, 81)
RGB (0–1)0.0863, 0.2392, 0.3176
RGB percentages8.6%, 23.9%, 31.8%
HSLhsl(200.3, 57.3%, 20.2%)
HSV / HSBhsv(200.3, 72.8%, 31.8%)
CMYK72.8%, 24.7%, 0%, 68.2%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer1,457,489
CSS custom property--colour: #163D51;

Brightness & contrast

Relative luminance0.04102WCAG 2.x, 0 is black and 1 is white
Perceived brightness55.5 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 11.54:1
Contrast with white11.54:1WCAG normal text: AAA
Contrast with black1.82:1WCAG normal text: Fail
Greyscale equivalent#363636
Inverted#E9C2AE

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#333C52no red cones; affects about 1% of men; ΔE 9.1 from the original
Deuteranopia#2B3651no green cones; the most common form, about 1% of men; ΔE 10.2 from the original
Tritanopia#004244no blue cones; rare, and affects men and women equally; ΔE 14.7 from the original
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text11.54:1WCAG large text: AAA
Contrast with black, large text1.82:1WCAG large text: Fail

Named colours

Dark slate grey · ΔE 15.3Dim grey · ΔE 26.8Black · ΔE 29.6Slate grey · ΔE 29.7Light slate grey · ΔE 32.6Steel blue · ΔE 32.8
Nearest named CSS colourDark slate grey (#2F4F4F)ΔE 15.35, a distinctly different colour
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#512A16
Analogous#165148, #162051
Triadic#51163D, #3D5116
Split complementary#511620, #514716
Tetradic#481651, #512A16, #205116

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#5FACD4
Lighter +30%#3797C9
Lighter +20%#2C79A1
Lighter +10%#215B79
Darker −10%#0B1F29
Darker −20%#000101
Darker −30%#000000
Darker −40%#000000
More saturated +25%#09415E
Less saturated −25%#233944

Channel breakdown

R22
G61
B81
Red22 (8.6%)
Green61 (23.9%)
Blue81 (31.8%)
Hue200.34°
Saturation (HSL)57.28%
Lightness20.2%
Dominant channelBlue
Hex per channelR 16 · G 3D · B 51

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Every value on this page was computed from “163d51” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.