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Recognised as Colour

#155BC1

  • #155BC1
  • Blue
  • Dark
  • Nearest: Royal blue

#155BC1 is a blue with RGB values 21, 91, 193 and HSL 216°, 80%, 42%. It is a dark colour, so white text on it reaches 6.4:1 contrast (AA for normal text). The nearest named colour is Royal blue.

Colour values

#155BC1#155BC1
HEX#155BC1
RGBrgb(21, 91, 193)
RGB (0–1)0.0824, 0.3569, 0.7569
RGB percentages8.2%, 35.7%, 75.7%
HSLhsl(215.6, 80.4%, 42%)
HSV / HSBhsv(215.6, 89.1%, 75.7%)
CMYK89.1%, 52.8%, 0%, 24.3%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer1,399,745
CSS custom property--colour: #155BC1;

Brightness & contrast

Relative luminance0.11492WCAG 2.x, 0 is black and 1 is white
Perceived brightness96.1 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 6.37:1
Contrast with white6.37:1WCAG normal text: AA
Contrast with black3.3:1WCAG normal text: Fail
Greyscale equivalent#535353
Inverted#EAA43E

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#0767C5no red cones; affects about 1% of men; ΔE 8.4 from the original
Deuteranopia#0058BFno green cones; the most common form, about 1% of men; ΔE 1.6 from the original
Tritanopia#007485no blue cones; rare, and affects men and women equally; ΔE 58 from the original
Distinguishable without hueShifts in lightness toonever rely on hue alone to carry meaning
Contrast with white, large text6.37:1WCAG large text: AAA
Contrast with black, large text3.3:1WCAG large text: AA

Named colours

Royal blue · ΔE 12.2Slate blue · ΔE 17.9Dark slateblue · ΔE 20.7Dodgerblue · ΔE 21.4Medium purple · ΔE 24.8Cornflower blue · ΔE 25.5
Nearest named CSS colourRoyal blue (#4169E1)ΔE 12.17, a distinctly different colour
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#C17B15
Analogous#15B1C1, #2515C1
Triadic#C1155B, #5BC115
Split complementary#C12515, #B1C115
Tetradic#C115B1, #C17B15, #15C125

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#ACCAF6
Lighter +30%#7EADF1
Lighter +20%#508FEC
Lighter +10%#2272E7
Darker −10%#104593
Darker −20%#0B3065
Darker −30%#061A37
Darker −40%#010409
More saturated +25%#0057D6
Less saturated −25%#3060A6

Channel breakdown

R21
G91
B193
Red21 (8.2%)
Green91 (35.7%)
Blue193 (75.7%)
Hue215.58°
Saturation (HSL)80.37%
Lightness41.96%
Dominant channelBlue
Hex per channelR 15 · G 5B · B C1

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Every value on this page was computed from “155bc1” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.