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Recognised as Colour

#1591FB

  • #1591FB
  • Blue
  • Dark
  • Nearest: Dodgerblue

#1591FB is a blue with RGB values 21, 145, 251 and HSL 208°, 97%, 53%. It is a dark colour, so black text on it reaches 6.5:1 contrast (AA for normal text). The nearest named colour is Dodgerblue.

Colour values

#1591FB#1591FB
HEX#1591FB
RGBrgb(21, 145, 251)
RGB (0–1)0.0824, 0.5686, 0.9843
RGB percentages8.2%, 56.9%, 98.4%
HSLhsl(207.7, 96.6%, 53.3%)
HSV / HSBhsv(207.7, 91.6%, 98.4%)
CMYK91.6%, 42.2%, 0%, 1.6%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer1,413,627
CSS custom property--colour: #1591FB;

Brightness & contrast

Relative luminance0.27375WCAG 2.x, 0 is black and 1 is white
Perceived brightness140.2 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundBlackcontrast 6.48:1
Contrast with white3.24:1WCAG normal text: Fail
Contrast with black6.48:1WCAG normal text: AA
Greyscale equivalent#7E7E7E
Inverted#EA6E04

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#5A99FFno red cones; affects about 1% of men; ΔE 7.2 from the original
Deuteranopia#2D86F9no green cones; the most common form, about 1% of men; ΔE 8.6 from the original
Tritanopia#00ABBAno blue cones; rare, and affects men and women equally; ΔE 57.9 from the original
Distinguishable without hueShifts in lightness toonever rely on hue alone to carry meaning
Contrast with white, large text3.24:1WCAG large text: AA
Contrast with black, large text6.48:1WCAG large text: AAA

Named colours

Dodgerblue · ΔE 3.3Cornflower blue · ΔE 12.4Royal blue · ΔE 22.4Medium purple · ΔE 31.7Steel blue · ΔE 32Slate blue · ΔE 32
Nearest named CSS colourDodgerblue (#1E90FF)ΔE 3.29, a close match
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#FB7F15
Analogous#15FBF2, #151EFB
Triadic#FB1591, #91FB15
Split complementary#FB151E, #FBF215
Tetradic#F215FB, #FB7F15, #1EFB15

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#DEEFFE
Lighter +30%#ABD8FE
Lighter +20%#79C0FD
Lighter +10%#47A9FC
Darker −10%#0477D9
Darker −20%#035BA7
Darker −30%#024075
Darker −40%#012543
More saturated +25%#1191FF
Less saturated −25%#338FDD

Channel breakdown

R21
G145
B251
Red21 (8.2%)
Green145 (56.9%)
Blue251 (98.4%)
Hue207.65°
Saturation (HSL)96.64%
Lightness53.33%
Dominant channelBlue
Hex per channelR 15 · G 91 · B FB

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Every value on this page was computed from “1591fb” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.