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Recognised as Colour

#15A5F9

  • #15A5F9
  • Blue
  • Dark
  • Nearest: Cornflower blue

#15A5F9 is a blue with RGB values 21, 165, 249 and HSL 202°, 95%, 53%. It is a dark colour, so black text on it reaches 7.8:1 contrast (AAA for normal text). The nearest named colour is Cornflower blue.

Colour values

#15A5F9#15A5F9
HEX#15A5F9
RGBrgb(21, 165, 249)
RGB (0–1)0.0824, 0.6471, 0.9765
RGB percentages8.2%, 64.7%, 97.6%
HSLhsl(202.1, 95%, 52.9%)
HSV / HSBhsv(202.1, 91.6%, 97.6%)
CMYK91.6%, 33.7%, 0%, 2.4%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer1,418,745
CSS custom property--colour: #15A5F9;

Brightness & contrast

Relative luminance0.33909WCAG 2.x, 0 is black and 1 is white
Perceived brightness152.3 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundBlackcontrast 7.78:1
Contrast with white2.7:1WCAG normal text: Fail
Contrast with black7.78:1WCAG normal text: AAA
Greyscale equivalent#8C8C8C
Inverted#EA5A06

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#7CA8FDno red cones; affects about 1% of men; ΔE 14.7 from the original
Deuteranopia#5D95F7no green cones; the most common form, about 1% of men; ΔE 16.9 from the original
Tritanopia#00BAC3no blue cones; rare, and affects men and women equally; ΔE 46.9 from the original
Distinguishable without hueShifts in lightness toonever rely on hue alone to carry meaning
Contrast with white, large text2.7:1WCAG large text: Fail
Contrast with black, large text7.78:1WCAG large text: AAA

Named colours

Cornflower blue · ΔE 14.8Deep skyblue · ΔE 17.2Dodgerblue · ΔE 20Steel blue · ΔE 22.8Light skyblue · ΔE 27.8Sky blue · ΔE 34.7
Nearest named CSS colourCornflower blue (#6495ED)ΔE 14.79, a distinctly different colour
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#F96915
Analogous#15F9DB, #1533F9
Triadic#F915A5, #A5F915
Split complementary#F91533, #F9DB15
Tetradic#DB15F9, #F96915, #33F915

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#DCF1FE
Lighter +30%#AADEFD
Lighter +20%#78CBFC
Lighter +10%#47B8FA
Darker −10%#0589D6
Darker −20%#0469A4
Darker −30%#034972
Darker −40%#022940
More saturated +25%#0FA7FF
Less saturated −25%#339DDB

Channel breakdown

R21
G165
B249
Red21 (8.2%)
Green165 (64.7%)
Blue249 (97.6%)
Hue202.11°
Saturation (HSL)95%
Lightness52.94%
Dominant channelBlue
Hex per channelR 15 · G A5 · B F9

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Every value on this page was computed from “15a5f9” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.