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Recognised as Colour

#155D90

  • #155D90
  • Blue
  • Dark
  • Nearest: Steel blue

#155D90 is a blue with RGB values 21, 93, 144 and HSL 205°, 75%, 32%. It is a dark colour, so white text on it reaches 7:1 contrast (AA for normal text). The nearest named colour is Steel blue.

Colour values

#155D90#155D90
HEX#155D90
RGBrgb(21, 93, 144)
RGB (0–1)0.0824, 0.3647, 0.5647
RGB percentages8.2%, 36.5%, 56.5%
HSLhsl(204.9, 74.5%, 32.4%)
HSV / HSBhsv(204.9, 85.4%, 56.5%)
CMYK85.4%, 35.4%, 0%, 43.5%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer1,400,208
CSS custom property--colour: #155D90;

Brightness & contrast

Relative luminance0.10002WCAG 2.x, 0 is black and 1 is white
Perceived brightness87 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 7:1
Contrast with white7:1WCAG normal text: AA
Contrast with black3:1WCAG normal text: Fail
Greyscale equivalent#515151
Inverted#EAA26F

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#455F92no red cones; affects about 1% of men; ΔE 8.7 from the original
Deuteranopia#33548Fno green cones; the most common form, about 1% of men; ΔE 10.1 from the original
Tritanopia#00696Fno blue cones; rare, and affects men and women equally; ΔE 31.5 from the original
Distinguishable without hueShifts in lightness toonever rely on hue alone to carry meaning
Contrast with white, large text7:1WCAG large text: AAA
Contrast with black, large text3:1WCAG large text: AA

Named colours

Steel blue · ΔE 14.9Slate grey · ΔE 27.9Light slate grey · ΔE 29.2Dark slateblue · ΔE 30Cornflower blue · ΔE 30.7Dark slate grey · ΔE 32.5
Nearest named CSS colourSteel blue (#4682B4)ΔE 14.88, a distinctly different colour
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#904815
Analogous#159085, #152090
Triadic#90155D, #5D9015
Split complementary#90151F, #908515
Tetradic#861590, #904815, #209015

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#84C1ED
Lighter +30%#57ABE7
Lighter +20%#2B95E0
Lighter +10%#1B7ABD
Darker −10%#0F4063
Darker −20%#082437
Darker −30%#02070A
Darker −40%#000000
More saturated +25%#0061A5
Less saturated −25%#2A597B

Channel breakdown

R21
G93
B144
Red21 (8.2%)
Green93 (36.5%)
Blue144 (56.5%)
Hue204.88°
Saturation (HSL)74.55%
Lightness32.35%
Dominant channelBlue
Hex per channelR 15 · G 5D · B 90

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Every value on this page was computed from “155d90” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.