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Recognised as Colour

#175B91

  • #175B91
  • Blue
  • Dark
  • Nearest: Steel blue

#175B91 is a blue with RGB values 23, 91, 145 and HSL 207°, 73%, 33%. It is a dark colour, so white text on it reaches 7.1:1 contrast (AAA for normal text). The nearest named colour is Steel blue.

Colour values

#175B91#175B91
HEX#175B91
RGBrgb(23, 91, 145)
RGB (0–1)0.0902, 0.3569, 0.5686
RGB percentages9%, 35.7%, 56.9%
HSLhsl(206.6, 72.6%, 32.9%)
HSV / HSBhsv(206.6, 84.1%, 56.9%)
CMYK84.1%, 37.2%, 0%, 43.1%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer1,530,769
CSS custom property--colour: #175B91;

Brightness & contrast

Relative luminance0.09709WCAG 2.x, 0 is black and 1 is white
Perceived brightness86.1 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 7.14:1
Contrast with white7.14:1WCAG normal text: AAA
Contrast with black2.94:1WCAG normal text: Fail
Greyscale equivalent#505050
Inverted#E8A46E

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#415E93no red cones; affects about 1% of men; ΔE 7.1 from the original
Deuteranopia#2F5390no green cones; the most common form, about 1% of men; ΔE 8.6 from the original
Tritanopia#00686Fno blue cones; rare, and affects men and women equally; ΔE 33.1 from the original
Distinguishable without hueShifts in lightness toonever rely on hue alone to carry meaning
Contrast with white, large text7.14:1WCAG large text: AAA
Contrast with black, large text2.94:1WCAG large text: Fail

Named colours

Steel blue · ΔE 16Dark slateblue · ΔE 27.8Slate grey · ΔE 29.5Cornflower blue · ΔE 29.8Light slate grey · ΔE 30.8Dark slate grey · ΔE 34.4
Nearest named CSS colourSteel blue (#4682B4)ΔE 15.99, a distinctly different colour
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#914D17
Analogous#17918A, #171E91
Triadic#91175B, #5B9117
Split complementary#91171E, #918A17
Tetradic#8A1791, #914D17, #1E9117

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#88C0EC
Lighter +30%#5CA8E5
Lighter +20%#3091DE
Lighter +10%#1E77BD
Darker −10%#103F65
Darker −20%#092439
Darker −30%#02080D
Darker −40%#000000
More saturated +25%#025DA6
Less saturated −25%#2C597C

Channel breakdown

R23
G91
B145
Red23 (9%)
Green91 (35.7%)
Blue145 (56.9%)
Hue206.56°
Saturation (HSL)72.62%
Lightness32.94%
Dominant channelBlue
Hex per channelR 17 · G 5B · B 91

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Every value on this page was computed from “175b91” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.