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Recognised as Colour

#155DEC

  • #155DEC
  • Blue
  • Dark
  • Nearest: Royal blue

#155DEC is a blue with RGB values 21, 93, 236 and HSL 220°, 85%, 50%. It is a dark colour, so white text on it reaches 5.5:1 contrast (AA for normal text). The nearest named colour is Royal blue.

Colour values

#155DEC#155DEC
HEX#155DEC
RGBrgb(21, 93, 236)
RGB (0–1)0.0824, 0.3647, 0.9255
RGB percentages8.2%, 36.5%, 92.5%
HSLhsl(219.9, 85%, 50.4%)
HSV / HSBhsv(219.9, 91.1%, 92.5%)
CMYK91.1%, 60.6%, 0%, 7.5%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer1,400,300
CSS custom property--colour: #155DEC;

Brightness & contrast

Relative luminance0.14044WCAG 2.x, 0 is black and 1 is white
Perceived brightness107.5 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 5.51:1
Contrast with white5.51:1WCAG normal text: AA
Contrast with black3.81:1WCAG normal text: Fail
Greyscale equivalent#585858
Inverted#EAA213

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#0073F1no red cones; affects about 1% of men; ΔE 15.7 from the original
Deuteranopia#005FE9no green cones; the most common form, about 1% of men; ΔE 3.5 from the original
Tritanopia#00839Cno blue cones; rare, and affects men and women equally; ΔE 78.4 from the original
Distinguishable without hueShifts in lightness toonever rely on hue alone to carry meaning
Contrast with white, large text5.51:1WCAG large text: AAA
Contrast with black, large text3.81:1WCAG large text: AA

Named colours

Royal blue · ΔE 14.9Medium slateblue · ΔE 15.8Slate blue · ΔE 19.6Medium purple · ΔE 29.3Dodgerblue · ΔE 31.8Rebecca purple · ΔE 33.3
Nearest named CSS colourRoyal blue (#4169E1)ΔE 14.89, a distinctly different colour
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#ECA415
Analogous#15C8EC, #3915EC
Triadic#EC155D, #5DEC15
Split complementary#EC3915, #C8EC15
Tetradic#EC15C8, #ECA415, #15EC39

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#D2E0FB
Lighter +30%#A3BFF7
Lighter +20%#739EF4
Lighter +10%#447EF0
Darker −10%#0F4ABF
Darker −20%#0C388F
Darker −30%#082560
Darker −40%#041331
More saturated +25%#0257FF
Less saturated −25%#3567CC

Channel breakdown

R21
G93
B236
Red21 (8.2%)
Green93 (36.5%)
Blue236 (92.5%)
Hue219.91°
Saturation (HSL)84.98%
Lightness50.39%
Dominant channelBlue
Hex per channelR 15 · G 5D · B EC

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