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Recognised as Colour

#378D9E

  • #378D9E
  • Cyan
  • Dark
  • Nearest: Cadetblue

#378D9E is a cyan with RGB values 55, 141, 158 and HSL 190°, 48%, 42%. It is a dark colour, so black text on it reaches 5.5:1 contrast (AA for normal text). The nearest named colour is Cadetblue.

Colour values

#378D9E#378D9E
HEX#378D9E
RGBrgb(55, 141, 158)
RGB (0–1)0.2157, 0.5529, 0.6196
RGB percentages21.6%, 55.3%, 62%
HSLhsl(189.9, 48.4%, 41.8%)
HSV / HSBhsv(189.9, 65.2%, 62%)
CMYK65.2%, 10.8%, 0%, 38%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer3,640,734
CSS custom property--colour: #378D9E;

Brightness & contrast

Relative luminance0.22331WCAG 2.x, 0 is black and 1 is white
Perceived brightness124.2 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundBlackcontrast 5.47:1
Contrast with white3.84:1WCAG normal text: Fail
Contrast with black5.47:1WCAG normal text: AA
Greyscale equivalent#7C7C7C
Inverted#C87261

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#80889Fno red cones; affects about 1% of men; ΔE 22.7 from the original
Deuteranopia#717D9Eno green cones; the most common form, about 1% of men; ΔE 23.8 from the original
Tritanopia#009492no blue cones; rare, and affects men and women equally; ΔE 15 from the original
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text3.84:1WCAG large text: AA
Contrast with black, large text5.47:1WCAG large text: AAA

Named colours

Cadetblue · ΔE 11.4Dark cyan · ΔE 13.1Teal · ΔE 13.4Light slate grey · ΔE 18.8Slate grey · ΔE 19.1Steel blue · ΔE 22.4
Nearest named CSS colourCadetblue (#5F9EA0)ΔE 11.44, a distinctly different colour
Hue familycyan
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#9E4837
Analogous#379E7B, #375A9E
Triadic#9E378D, #8D9E37
Split complementary#9E375A, #9E7B37
Tetradic#7B379E, #9E4837, #5A9E37

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#BAE0E7
Lighter +30%#94CEDA
Lighter +20%#6EBDCD
Lighter +10%#49ACBF
Darker −10%#2A6B78
Darker −20%#1D4952
Darker −30%#0F282D
Darker −40%#020607
More saturated +25%#1C9FB9
Less saturated −25%#527B83

Channel breakdown

R55
G141
B158
Red55 (21.6%)
Green141 (55.3%)
Blue158 (62%)
Hue189.9°
Saturation (HSL)48.36%
Lightness41.76%
Dominant channelBlue
Hex per channelR 37 · G 8D · B 9E

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Every value on this page was computed from “378d9e” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.