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Recognised as Colour

#17515B

  • #17515B
  • Cyan
  • Dark
  • Nearest: Dark slate grey

#17515B is a cyan with RGB values 23, 81, 91 and HSL 189°, 60%, 22%. It is a dark colour, so white text on it reaches 8.9:1 contrast (AAA for normal text). The nearest named colour is Dark slate grey.

Colour values

#17515B#17515B
HEX#17515B
RGBrgb(23, 81, 91)
RGB (0–1)0.0902, 0.3176, 0.3569
RGB percentages9%, 31.8%, 35.7%
HSLhsl(188.8, 59.6%, 22.4%)
HSV / HSBhsv(188.8, 74.7%, 35.7%)
CMYK74.7%, 11%, 0%, 64.3%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer1,528,155
CSS custom property--colour: #17515B;

Brightness & contrast

Relative luminance0.06822WCAG 2.x, 0 is black and 1 is white
Perceived brightness70.4 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 8.88:1
Contrast with white8.88:1WCAG normal text: AAA
Contrast with black2.36:1WCAG normal text: Fail
Greyscale equivalent#454545
Inverted#E8AEA4

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#494E5Cno red cones; affects about 1% of men; ΔE 16.4 from the original
Deuteranopia#3F475Bno green cones; the most common form, about 1% of men; ΔE 16.8 from the original
Tritanopia#005554no blue cones; rare, and affects men and women equally; ΔE 9.1 from the original
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text8.88:1WCAG large text: AAA
Contrast with black, large text2.36:1WCAG large text: Fail

Named colours

Dark slate grey · ΔE 8.1Teal · ΔE 22.2Dim grey · ΔE 22.6Slate grey · ΔE 24.8Dark cyan · ΔE 26.3Light slate grey · ΔE 27.5
Nearest named CSS colourDark slate grey (#2F4F4F)ΔE 8.1, clearly different but related
Hue familycyan
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#5B2117
Analogous#175B43, #172F5B
Triadic#5B1751, #515B17
Split complementary#5B172F, #5B4317
Tetradic#43175B, #5B2117, #2F5B17

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#66C7D8
Lighter +30%#3DB9CE
Lighter +20%#2C99AC
Lighter +10%#217584
Darker −10%#0D2D32
Darker −20%#02090A
Darker −30%#000000
Darker −40%#000000
More saturated +25%#095B69
Less saturated −25%#25474D

Channel breakdown

R23
G81
B91
Red23 (9%)
Green81 (31.8%)
Blue91 (35.7%)
Hue188.82°
Saturation (HSL)59.65%
Lightness22.35%
Dominant channelBlue
Hex per channelR 17 · G 51 · B 5B

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Every value on this page was computed from “17515b” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.