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Recognised as Colour

#6551AF

  • #6551AF
  • Blue
  • Dark
  • Nearest: Slate blue

#6551AF is a blue with RGB values 101, 81, 175 and HSL 253°, 37%, 50%. It is a dark colour, so white text on it reaches 6.3:1 contrast (AA for normal text). The nearest named colour is Slate blue.

Colour values

#6551AF#6551AF
HEX#6551AF
RGBrgb(101, 81, 175)
RGB (0–1)0.3961, 0.3176, 0.6863
RGB percentages39.6%, 31.8%, 68.6%
HSLhsl(252.8, 37%, 50.2%)
HSV / HSBhsv(252.8, 53.7%, 68.6%)
CMYK42.3%, 53.7%, 0%, 31.4%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer6,640,047
CSS custom property--colour: #6551AF;

Brightness & contrast

Relative luminance0.11747WCAG 2.x, 0 is black and 1 is white
Perceived brightness101.9 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 6.27:1
Contrast with white6.27:1WCAG normal text: AA
Contrast with black3.35:1WCAG normal text: Fail
Greyscale equivalent#5C5C5C
Inverted#9AAE50

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#2562B2no red cones; affects about 1% of men; ΔE 21.7 from the original
Deuteranopia#285EADno green cones; the most common form, about 1% of men; ΔE 20.7 from the original
Tritanopia#506578no blue cones; rare, and affects men and women equally; ΔE 48.6 from the original
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text6.27:1WCAG large text: AAA
Contrast with black, large text3.35:1WCAG large text: AA

Named colours

Slate blue · ΔE 12Dark slateblue · ΔE 12.6Rebecca purple · ΔE 13.9Medium purple · ΔE 15.3Royal blue · ΔE 19.7Medium slateblue · ΔE 23.2
Nearest named CSS colourSlate blue (#6A5ACD)ΔE 12.03, a distinctly different colour
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#9BAF51
Analogous#516CAF, #9451AF
Triadic#AF6551, #51AF65
Split complementary#AF9451, #6CAF51
Tetradic#AF516C, #9BAF51, #51AF94

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#E1DDEF
Lighter +30%#C2BADF
Lighter +20%#A397CF
Lighter +10%#8474BF
Darker −10%#51418C
Darker −20%#3D3169
Darker −30%#292047
Darker −40%#141024
More saturated +25%#5331CF
Less saturated −25%#77718F

Channel breakdown

R101
G81
B175
Red101 (39.6%)
Green81 (31.8%)
Blue175 (68.6%)
Hue252.77°
Saturation (HSL)37.01%
Lightness50.2%
Dominant channelBlue
Hex per channelR 65 · G 51 · B AF

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Every value on this page was computed from “6551af” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.