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Recognised as Colour

#0178AA

  • #0178AA
  • Cyan
  • Dark
  • Nearest: Steel blue

#0178AA is a cyan with RGB values 1, 120, 170 and HSL 198°, 99%, 34%. 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

#0178AA#0178AA
HEX#0178AA
RGBrgb(1, 120, 170)
RGB (0–1)0.0039, 0.4706, 0.6667
RGB percentages0.4%, 47.1%, 66.7%
HSLhsl(197.8, 98.8%, 33.5%)
HSV / HSBhsv(197.8, 99.4%, 66.7%)
CMYK99.4%, 29.4%, 0%, 33.3%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer96,426
CSS custom property--colour: #0178AA;

Brightness & contrast

Relative luminance0.16342WCAG 2.x, 0 is black and 1 is white
Perceived brightness108.4 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 4.92:1
Contrast with white4.92:1WCAG normal text: AA
Contrast with black4.27:1WCAG normal text: Fail
Greyscale equivalent#626262
Inverted#FE8755

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#5F78ACno red cones; affects about 1% of men; ΔE 15.3 from the original
Deuteranopia#4B6AA9no green cones; the most common form, about 1% of men; ΔE 17.6 from the original
Tritanopia#008589no blue cones; rare, and affects men and women equally; ΔE 30.4 from the original
Distinguishable without hueShifts in lightness toonever rely on hue alone to carry meaning
Contrast with white, large text4.92:1WCAG large text: AAA
Contrast with black, large text4.27:1WCAG large text: AA

Named colours

Steel blue · ΔE 7.7Slate grey · ΔE 25.5Light slate grey · ΔE 25.8Deep skyblue · ΔE 27.7Cornflower blue · ΔE 28Cadetblue · ΔE 32
Nearest named CSS colourSteel blue (#4682B4)ΔE 7.67, clearly different but related
Hue familycyan
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#AA3301
Analogous#01AA87, #0124AA
Triadic#AA0178, #78AA01
Split complementary#AA0124, #AA8801
Tetradic#8701AA, #AA3301, #23AA01

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#79D7FE
Lighter +30%#46C8FE
Lighter +20%#13B8FE
Lighter +10%#019CDD
Darker −10%#015477
Darker −20%#003045
Darker −30%#000D12
Darker −40%#000000
More saturated +25%#0078AB
Less saturated −25%#166F95

Channel breakdown

R1
G120
B170
Red1 (0.4%)
Green120 (47.1%)
Blue170 (66.7%)
Hue197.75°
Saturation (HSL)98.83%
Lightness33.53%
Dominant channelBlue
Hex per channelR 01 · G 78 · B AA

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Every value on this page was computed from “0178aa” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.