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Colour

#556FFD

  • #556FFD
  • Blue
  • Dark
  • Nearest: Medium slateblue

#556FFD is a blue with RGB values 85, 111, 253 and HSL 231°, 98%, 66%. It is a dark colour, so black text on it reaches 5.1:1 contrast (AA for normal text). The nearest named colour is Medium slateblue.

Colour values

#556FFD#556FFD
HEX#556FFD
RGBrgb(85, 111, 253)
RGB (0–1)0.3333, 0.4353, 0.9922
RGB percentages33.3%, 43.5%, 99.2%
HSLhsl(230.7, 97.7%, 66.3%)
HSV / HSBhsv(230.7, 66.4%, 99.2%)
CMYK66.4%, 56.1%, 0%, 0.8%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer5,599,229
CSS custom property--colour: #556FFD;

Brightness & contrast

Relative luminance0.20392WCAG 2.x, 0 is black and 1 is white
Perceived brightness129.2 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundBlackcontrast 5.08:1
Contrast with white4.14:1WCAG normal text: Fail
Contrast with black5.08:1WCAG normal text: AA
Greyscale equivalent#747474
Inverted#AA9002

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#0085FFno red cones; affects about 1% of men; ΔE 20.3 from the original
Deuteranopia#0075FAno green cones; the most common form, about 1% of men; ΔE 11.3 from the original
Tritanopia#0092ABno blue cones; rare, and affects men and women equally; ΔE 77.9 from the original
Distinguishable without hueShifts in lightness toonever rely on hue alone to carry meaning
Contrast with white, large text4.14:1WCAG large text: AA
Contrast with black, large text5.08:1WCAG large text: AAA

Named colours

Medium slateblue · ΔE 10.3Royal blue · ΔE 12.9Slate blue · ΔE 17.4Medium purple · ΔE 23.8Dodgerblue · ΔE 28Rebecca purple · ΔE 33.8
Nearest named CSS colourMedium slateblue (#7B68EE)ΔE 10.25, a distinctly different colour
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#FDE355
Analogous#55C3FD, #8F55FD
Triadic#FD556F, #6FFD55
Split complementary#FD8F55, #C3FD55
Tetradic#FD55C3, #FDE355, #55FD8F

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#FFFFFF
Lighter +30%#ECEFFF
Lighter +20%#BAC4FE
Lighter +10%#879AFE
Darker −10%#2344FC
Darker −20%#0326E9
Darker −30%#021EB7
Darker −40%#021684
More saturated +25%#536EFF
Less saturated −25%#6A7EE8

Channel breakdown

R85
G111
B253
Red85 (33.3%)
Green111 (43.5%)
Blue253 (99.2%)
Hue230.71°
Saturation (HSL)97.67%
Lightness66.27%
Dominant channelBlue
Hex per channelR 55 · G 6F · B FD

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Every value on this page was computed from “556ffd” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.