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Recognised as Colour

#215BFB

  • #215BFB
  • Blue
  • Dark
  • Nearest: Medium slateblue

#215BFB is a blue with RGB values 33, 91, 251 and HSL 224°, 96%, 56%. It is a dark colour, so white text on it reaches 5.3:1 contrast (AA for normal text). The nearest named colour is Medium slateblue.

Colour values

#215BFB#215BFB
HEX#215BFB
RGBrgb(33, 91, 251)
RGB (0–1)0.1294, 0.3569, 0.9843
RGB percentages12.9%, 35.7%, 98.4%
HSLhsl(224, 96.5%, 55.7%)
HSV / HSBhsv(224, 86.9%, 98.4%)
CMYK86.9%, 63.7%, 0%, 1.6%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer2,186,235
CSS custom property--colour: #215BFB;

Brightness & contrast

Relative luminance0.14771WCAG 2.x, 0 is black and 1 is white
Perceived brightness111.2 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 5.31:1
Contrast with white5.31:1WCAG normal text: AA
Contrast with black3.95:1WCAG normal text: Fail
Greyscale equivalent#5A5A5A
Inverted#DEA404

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#0076FFno red cones; affects about 1% of men; ΔE 19.9 from the original
Deuteranopia#0061F8no green cones; the most common form, about 1% of men; ΔE 6.7 from the original
Tritanopia#0086A3no blue cones; rare, and affects men and women equally; ΔE 86.2 from the original
Distinguishable without hueShifts in lightness toonever rely on hue alone to carry meaning
Contrast with white, large text5.31:1WCAG large text: AAA
Contrast with black, large text3.95:1WCAG large text: AA

Named colours

Medium slateblue · ΔE 19.8Royal blue · ΔE 24.4Slate blue · ΔE 26.8Blue violet · ΔE 29.8Medium blue · ΔE 33.5Dark orchid · ΔE 33.6
Nearest named CSS colourMedium slateblue (#7B68EE)ΔE 19.84, a distinctly different colour
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#FBC121
Analogous#21C8FB, #5421FB
Triadic#FB215B, #5BFB21
Split complementary#FB5421, #C8FB21
Tetradic#FB21C8, #FBC121, #21FB54

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#E9EFFF
Lighter +30%#B7CAFE
Lighter +20%#85A5FD
Lighter +10%#5380FC
Darker −10%#0440E5
Darker −20%#0332B3
Darker −30%#022481
Darker −40%#01164F
More saturated +25%#1D59FF
Less saturated −25%#3D68DF

Channel breakdown

R33
G91
B251
Red33 (12.9%)
Green91 (35.7%)
Blue251 (98.4%)
Hue224.04°
Saturation (HSL)96.46%
Lightness55.69%
Dominant channelBlue
Hex per channelR 21 · G 5B · B FB

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Every value on this page was computed from “215bfb” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.