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Recognised as Colour

#175A63

  • #175A63
  • Cyan
  • Dark
  • Nearest: Dark slate grey

#175A63 is a cyan with RGB values 23, 90, 99 and HSL 187°, 62%, 24%. It is a dark colour, so white text on it reaches 7.8:1 contrast (AAA for normal text). The nearest named colour is Dark slate grey.

Colour values

#175A63#175A63
HEX#175A63
RGBrgb(23, 90, 99)
RGB (0–1)0.0902, 0.3529, 0.3882
RGB percentages9%, 35.3%, 38.8%
HSLhsl(187.1, 62.3%, 23.9%)
HSV / HSBhsv(187.1, 76.8%, 38.8%)
CMYK76.8%, 9.1%, 0%, 61.2%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer1,530,467
CSS custom property--colour: #175A63;

Brightness & contrast

Relative luminance0.08395WCAG 2.x, 0 is black and 1 is white
Perceived brightness77.7 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 7.84:1
Contrast with white7.84:1WCAG normal text: AAA
Contrast with black2.68:1WCAG normal text: Fail
Greyscale equivalent#4C4C4C
Inverted#E8A59C

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#525664no red cones; affects about 1% of men; ΔE 19 from the original
Deuteranopia#474E63no green cones; the most common form, about 1% of men; ΔE 19.7 from the original
Tritanopia#005E5Dno blue cones; rare, and affects men and women equally; ΔE 8.2 from the original
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text7.84:1WCAG large text: AAA
Contrast with black, large text2.68:1WCAG large text: Fail

Named colours

Dark slate grey · ΔE 9.8Teal · ΔE 18.1Dark cyan · ΔE 22.2Dim grey · ΔE 22.5Slate grey · ΔE 23.4Light slate grey · ΔE 25.8
Nearest named CSS colourDark slate grey (#2F4F4F)ΔE 9.77, clearly different but related
Hue familycyan
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#632017
Analogous#176346, #173463
Triadic#63175A, #5A6317
Split complementary#631734, #634617
Tetradic#461763, #632017, #346317

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#6ACFDC
Lighter +30%#40C1D3
Lighter +20%#2AA5B6
Lighter +10%#21808C
Darker −10%#0D343A
Darker −20%#040F10
Darker −30%#000000
Darker −40%#000000
More saturated +25%#086672
Less saturated −25%#264E54

Channel breakdown

R23
G90
B99
Red23 (9%)
Green90 (35.3%)
Blue99 (38.8%)
Hue187.11°
Saturation (HSL)62.3%
Lightness23.92%
Dominant channelBlue
Hex per channelR 17 · G 5A · B 63

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Every value on this page was computed from “175a63” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.