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Recognised as Colour

#172A35

  • #172A35
  • Blue
  • Dark
  • Nearest: Dark slate grey

#172A35 is a blue with RGB values 23, 42, 53 and HSL 202°, 39%, 15%. It is a dark colour, so white text on it reaches 14.8:1 contrast (AAA for normal text). The nearest named colour is Dark slate grey.

Colour values

#172A35#172A35
HEX#172A35
RGBrgb(23, 42, 53)
RGB (0–1)0.0902, 0.1647, 0.2078
RGB percentages9%, 16.5%, 20.8%
HSLhsl(202, 39.5%, 14.9%)
HSV / HSBhsv(202, 56.6%, 20.8%)
CMYK56.6%, 20.8%, 0%, 79.2%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer1,518,133
CSS custom property--colour: #172A35;

Brightness & contrast

Relative luminance0.02095WCAG 2.x, 0 is black and 1 is white
Perceived brightness38.9 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 14.8:1
Contrast with white14.8:1WCAG normal text: AAA
Contrast with black1.42:1WCAG normal text: Fail
Greyscale equivalent#272727
Inverted#E8D5CA

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#252A36no red cones; affects about 1% of men; ΔE 5.4 from the original
Deuteranopia#212635no green cones; the most common form, about 1% of men; ΔE 6.3 from the original
Tritanopia#092D2Eno blue cones; rare, and affects men and women equally; ΔE 9.5 from the original
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text14.8:1WCAG large text: AAA
Contrast with black, large text1.42:1WCAG large text: Fail

Named colours

Dark slate grey · ΔE 18.1Black · ΔE 19Dim grey · ΔE 30.2Slate grey · ΔE 36.9Gray · ΔE 39Light slate grey · ΔE 40
Nearest named CSS colourDark slate grey (#2F4F4F)ΔE 18.08, a distinctly different colour
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#352217
Analogous#173531, #171B35
Triadic#35172A, #2A3517
Split complementary#35171B, #353117
Tetradic#311735, #352217, #1B3517

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#5F98B9
Lighter +30%#457FA0
Lighter +20%#36627C
Lighter +10%#264659
Darker −10%#080E11
Darker −20%#000000
Darker −30%#000000
Darker −40%#000000
More saturated +25%#0D2D3F
Less saturated −25%#21272B

Channel breakdown

R23
G42
B53
Red23 (9%)
Green42 (16.5%)
Blue53 (20.8%)
Hue202°
Saturation (HSL)39.47%
Lightness14.9%
Dominant channelBlue
Hex per channelR 17 · G 2A · B 35

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Every value on this page was computed from “172a35” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.