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Recognised as Colour

#1287FF

  • #1287FF
  • Blue
  • Dark
  • Nearest: Dodgerblue

#1287FF is a blue with RGB values 18, 135, 255 and HSL 210°, 100%, 54%. It is a dark colour, so black text on it reaches 5.9:1 contrast (AA for normal text). The nearest named colour is Dodgerblue.

Colour values

#1287FF#1287FF
HEX#1287FF
RGBrgb(18, 135, 255)
RGB (0–1)0.0706, 0.5294, 1
RGB percentages7.1%, 52.9%, 100%
HSLhsl(210.4, 100%, 53.5%)
HSV / HSBhsv(210.4, 92.9%, 100%)
CMYK92.9%, 47.1%, 0%, 0%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer1,214,463
CSS custom property--colour: #1287FF;

Brightness & contrast

Relative luminance0.24677WCAG 2.x, 0 is black and 1 is white
Perceived brightness134.9 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundBlackcontrast 5.94:1
Contrast with white3.54:1WCAG normal text: Fail
Contrast with black5.94:1WCAG normal text: AA
Greyscale equivalent#777777
Inverted#ED7800

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#4093FFno red cones; affects about 1% of men; ΔE 8.8 from the original
Deuteranopia#007FFDno green cones; the most common form, about 1% of men; ΔE 5.3 from the original
Tritanopia#00A4B7no blue cones; rare, and affects men and women equally; ΔE 64.7 from the original
Distinguishable without hueShifts in lightness toonever rely on hue alone to carry meaning
Contrast with white, large text3.54:1WCAG large text: AA
Contrast with black, large text5.94:1WCAG large text: AAA

Named colours

Dodgerblue · ΔE 7Royal blue · ΔE 14.6Cornflower blue · ΔE 19.8Slate blue · ΔE 26Medium slateblue · ΔE 26.7Medium purple · ΔE 28.1
Nearest named CSS colourDodgerblue (#1E90FF)ΔE 7.02, clearly different but related
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#FF8A12
Analogous#12FEFF, #1412FF
Triadic#FF1287, #87FF12
Split complementary#FF1312, #FEFF12
Tetradic#FF12FE, #FF8A12, #12FF14

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#DEEEFF
Lighter +30%#ABD4FF
Lighter +20%#78BBFF
Lighter +10%#45A1FF
Darker −10%#006EDE
Darker −20%#0054AB
Darker −30%#003B78
Darker −40%#002245
More saturated +25%#1287FF
Less saturated −25%#3087E1

Channel breakdown

R18
G135
B255
Red18 (7.1%)
Green135 (52.9%)
Blue255 (100%)
Hue210.38°
Saturation (HSL)100%
Lightness53.53%
Dominant channelBlue
Hex per channelR 12 · G 87 · B FF

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Every value on this page was computed from “1287ff” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.