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Recognised as Colour

#4991CB

  • #4991CB
  • Blue
  • Dark
  • Nearest: Steel blue

#4991CB is a blue with RGB values 73, 145, 203 and HSL 207°, 56%, 54%. It is a dark colour, so black text on it reaches 6.2:1 contrast (AA for normal text). The nearest named colour is Steel blue.

Colour values

#4991CB#4991CB
HEX#4991CB
RGBrgb(73, 145, 203)
RGB (0–1)0.2863, 0.5686, 0.7961
RGB percentages28.6%, 56.9%, 79.6%
HSLhsl(206.8, 55.6%, 54.1%)
HSV / HSBhsv(206.8, 64%, 79.6%)
CMYK64%, 28.6%, 0%, 20.4%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer4,821,451
CSS custom property--colour: #4991CB;

Brightness & contrast

Relative luminance0.25979WCAG 2.x, 0 is black and 1 is white
Perceived brightness136.5 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundBlackcontrast 6.2:1
Contrast with white3.39:1WCAG normal text: Fail
Contrast with black6.2:1WCAG normal text: AA
Greyscale equivalent#868686
Inverted#B66E34

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#7792CEno red cones; affects about 1% of men; ΔE 11.2 from the original
Deuteranopia#6686CAno green cones; the most common form, about 1% of men; ΔE 12.5 from the original
Tritanopia#009FA5no blue cones; rare, and affects men and women equally; ΔE 36.1 from the original
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text3.39:1WCAG large text: AA
Contrast with black, large text6.2:1WCAG large text: AAA

Named colours

Steel blue · ΔE 7.1Cornflower blue · ΔE 19.2Deep skyblue · ΔE 20.5Light skyblue · ΔE 24Light slate grey · ΔE 25.7Slate grey · ΔE 26.6
Nearest named CSS colourSteel blue (#4682B4)ΔE 7.1, clearly different but related
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#CB8349
Analogous#49CBC4, #4950CB
Triadic#CB4991, #91CB49
Split complementary#CB4950, #CBC449
Tetradic#C449CB, #CB8349, #50CB49

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#E8F1F8
Lighter +30%#C0D9ED
Lighter +20%#98C1E2
Lighter +10%#71A9D6
Darker −10%#3277AF
Darker −20%#275C87
Darker −30%#1B4160
Darker −40%#102638
More saturated +25%#2C94E8
Less saturated −25%#668EAE

Channel breakdown

R73
G145
B203
Red73 (28.6%)
Green145 (56.9%)
Blue203 (79.6%)
Hue206.77°
Saturation (HSL)55.56%
Lightness54.12%
Dominant channelBlue
Hex per channelR 49 · G 91 · B CB

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Every value on this page was computed from “4991cb” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.