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Recognised as Colour

#155FFE

  • #155FFE
  • Blue
  • Dark
  • Nearest: Medium slateblue

#155FFE is a blue with RGB values 21, 95, 254 and HSL 221°, 99%, 54%. It is a dark colour, so white text on it reaches 5.1:1 contrast (AA for normal text). The nearest named colour is Medium slateblue.

Colour values

#155FFE#155FFE
HEX#155FFE
RGBrgb(21, 95, 254)
RGB (0–1)0.0824, 0.3725, 0.9961
RGB percentages8.2%, 37.3%, 99.6%
HSLhsl(220.9, 99.1%, 53.9%)
HSV / HSBhsv(220.9, 91.7%, 99.6%)
CMYK91.7%, 62.6%, 0%, 0.4%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer1,400,830
CSS custom property--colour: #155FFE;

Brightness & contrast

Relative luminance0.155WCAG 2.x, 0 is black and 1 is white
Perceived brightness113.1 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 5.12:1
Contrast with white5.12:1WCAG normal text: AA
Contrast with black4.1:1WCAG normal text: Fail
Greyscale equivalent#5B5B5B
Inverted#EAA001

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#0078FFno red cones; affects about 1% of men; ΔE 19.7 from the original
Deuteranopia#0063FBno green cones; the most common form, about 1% of men; ΔE 4.9 from the original
Tritanopia#008AA6no blue cones; rare, and affects men and women equally; ΔE 85.9 from the original
Distinguishable without hueShifts in lightness toonever rely on hue alone to carry meaning
Contrast with white, large text5.12:1WCAG large text: AAA
Contrast with black, large text4.1:1WCAG large text: AA

Named colours

Medium slateblue · ΔE 19.6Royal blue · ΔE 23.2Slate blue · ΔE 26.6Blue violet · ΔE 31.8Dark orchid · ΔE 35Medium purple · ΔE 35.2
Nearest named CSS colourMedium slateblue (#7B68EE)ΔE 19.6, a distinctly different colour
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#FEB415
Analogous#15D3FE, #4015FE
Triadic#FE155F, #5FFE15
Split complementary#FE4015, #D3FE15
Tetradic#FE15D3, #FEB415, #15FE40

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#E0EAFF
Lighter +30%#ADC7FF
Lighter +20%#7BA4FE
Lighter +10%#4882FE
Darker −10%#0147DF
Darker −20%#0137AC
Darker −30%#012779
Darker −40%#001747
More saturated +25%#145FFF
Less saturated −25%#326AE1

Channel breakdown

R21
G95
B254
Red21 (8.2%)
Green95 (37.3%)
Blue254 (99.6%)
Hue220.94°
Saturation (HSL)99.15%
Lightness53.92%
Dominant channelBlue
Hex per channelR 15 · G 5F · B FE

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