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Colour

#177A99

  • #177A99
  • Cyan
  • Dark
  • Nearest: Steel blue

#177A99 is a cyan with RGB values 23, 122, 153 and HSL 194°, 74%, 35%. It is a dark colour, so white text on it reaches 4.9:1 contrast (AA for normal text). The nearest named colour is Steel blue.

Colour values

#177A99#177A99
HEX#177A99
RGBrgb(23, 122, 153)
RGB (0–1)0.0902, 0.4784, 0.6
RGB percentages9%, 47.8%, 60%
HSLhsl(194.3, 73.9%, 34.5%)
HSV / HSBhsv(194.3, 85%, 60%)
CMYK85%, 20.3%, 0%, 40%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer1,538,713
CSS custom property--colour: #177A99;

Brightness & contrast

Relative luminance0.16401WCAG 2.x, 0 is black and 1 is white
Perceived brightness107.5 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 4.91:1
Contrast with white4.91:1WCAG normal text: AA
Contrast with black4.28:1WCAG normal text: Fail
Greyscale equivalent#676767
Inverted#E88566

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#69779Bno red cones; affects about 1% of men; ΔE 19.8 from the original
Deuteranopia#586B99no green cones; the most common form, about 1% of men; ΔE 21.3 from the original
Tritanopia#008384no blue cones; rare, and affects men and women equally; ΔE 20.3 from the original
Distinguishable without hueShifts in lightness toonever rely on hue alone to carry meaning
Contrast with white, large text4.91:1WCAG large text: AAA
Contrast with black, large text4.28:1WCAG large text: AA

Named colours

Steel blue · ΔE 14.9Slate grey · ΔE 20Teal · ΔE 20.6Light slate grey · ΔE 20.6Dark cyan · ΔE 21.9Cadetblue · ΔE 22.1
Nearest named CSS colourSteel blue (#4682B4)ΔE 14.86, a distinctly different colour
Hue familycyan
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#993617
Analogous#179977, #173999
Triadic#99177A, #7A9917
Split complementary#991739, #997717
Tetradic#771799, #993617, #399917

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#8ED7EE
Lighter +30%#62C7E7
Lighter +20%#35B8E1
Lighter +10%#1E9DC5
Darker −10%#10576D
Darker −20%#0A3340
Darker −30%#031014
Darker −40%#000000
More saturated +25%#0186AF
Less saturated −25%#2D6E83

Channel breakdown

R23
G122
B153
Red23 (9%)
Green122 (47.8%)
Blue153 (60%)
Hue194.31°
Saturation (HSL)73.86%
Lightness34.51%
Dominant channelBlue
Hex per channelR 17 · G 7A · B 99

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Every value on this page was computed from “177a99” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.