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Recognised as Colour

#175DA3

  • #175DA3
  • Blue
  • Dark
  • Nearest: Steel blue

#175DA3 is a blue with RGB values 23, 93, 163 and HSL 210°, 75%, 36%. It is a dark colour, so white text on it reaches 6.7:1 contrast (AA for normal text). The nearest named colour is Steel blue.

Colour values

#175DA3#175DA3
HEX#175DA3
RGBrgb(23, 93, 163)
RGB (0–1)0.0902, 0.3647, 0.6392
RGB percentages9%, 36.5%, 63.9%
HSLhsl(210, 75.3%, 36.5%)
HSV / HSBhsv(210, 85.9%, 63.9%)
CMYK85.9%, 42.9%, 0%, 36.1%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer1,531,299
CSS custom property--colour: #175DA3;

Brightness & contrast

Relative luminance0.10655WCAG 2.x, 0 is black and 1 is white
Perceived brightness90.9 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 6.71:1
Contrast with white6.71:1WCAG normal text: AA
Contrast with black3.13:1WCAG normal text: Fail
Greyscale equivalent#535353
Inverted#E8A25C

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#3962A6no red cones; affects about 1% of men; ΔE 4.6 from the original
Deuteranopia#1F56A2no green cones; the most common form, about 1% of men; ΔE 5.9 from the original
Tritanopia#006E78no blue cones; rare, and affects men and women equally; ΔE 41.6 from the original
Distinguishable without hueShifts in lightness toonever rely on hue alone to carry meaning
Contrast with white, large text6.71:1WCAG large text: AAA
Contrast with black, large text3.13:1WCAG large text: AA

Named colours

Steel blue · ΔE 20.2Dark slateblue · ΔE 22Cornflower blue · ΔE 23.9Dodgerblue · ΔE 28.7Royal blue · ΔE 31.1Slate blue · ΔE 34.1
Nearest named CSS colourSteel blue (#4682B4)ΔE 20.21, a distinctly different colour
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#A35D17
Analogous#17A3A3, #1717A3
Triadic#A3175D, #5DA317
Split complementary#A31717, #A3A317
Tetradic#A317A3, #A35D17, #17A317

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#96C3F0
Lighter +30%#69AAEA
Lighter +20%#3C90E4
Lighter +10%#1D76D0
Darker −10%#114476
Darker −20%#0A2A4A
Darker −30%#04101D
Darker −40%#000000
More saturated +25%#005DBA
Less saturated −25%#2E5D8C

Channel breakdown

R23
G93
B163
Red23 (9%)
Green93 (36.5%)
Blue163 (63.9%)
Hue210°
Saturation (HSL)75.27%
Lightness36.47%
Dominant channelBlue
Hex per channelR 17 · G 5D · B A3

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Every value on this page was computed from “175da3” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.