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Recognised as Colour

#587CB7

  • #587CB7
  • Blue
  • Dark
  • Nearest: Steel blue

#587CB7 is a blue with RGB values 88, 124, 183 and HSL 217°, 40%, 53%. It is a dark colour, so black text on it reaches 5:1 contrast (AA for normal text). The nearest named colour is Steel blue.

Colour values

#587CB7#587CB7
HEX#587CB7
RGBrgb(88, 124, 183)
RGB (0–1)0.3451, 0.4863, 0.7176
RGB percentages34.5%, 48.6%, 71.8%
HSLhsl(217.3, 39.7%, 53.1%)
HSV / HSBhsv(217.3, 51.9%, 71.8%)
CMYK51.9%, 32.2%, 0%, 28.2%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer5,799,095
CSS custom property--colour: #587CB7;

Brightness & contrast

Relative luminance0.19909WCAG 2.x, 0 is black and 1 is white
Perceived brightness123.1 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundBlackcontrast 4.98:1
Contrast with white4.22:1WCAG normal text: Fail
Contrast with black4.98:1WCAG normal text: AA
Greyscale equivalent#797979
Inverted#A78348

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#6580B9no red cones; affects about 1% of men; ΔE 3.2 from the original
Deuteranopia#5A77B6no green cones; the most common form, about 1% of men; ΔE 3.8 from the original
Tritanopia#298991no blue cones; rare, and affects men and women equally; ΔE 36.6 from the original
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text4.22:1WCAG large text: AA
Contrast with black, large text4.98:1WCAG large text: AAA

Named colours

Steel blue · ΔE 8.9Cornflower blue · ΔE 18.3Light slate grey · ΔE 25.1Slate grey · ΔE 25.3Dodgerblue · ΔE 29.9Dark slateblue · ΔE 31
Nearest named CSS colourSteel blue (#4682B4)ΔE 8.9, clearly different but related
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#B79358
Analogous#58ABB7, #6458B7
Triadic#B7587C, #7CB758
Split complementary#B76458, #ABB758
Tetradic#B758AB, #B79358, #58B764

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#E7ECF4
Lighter +30%#C3D0E5
Lighter +20%#9FB4D6
Lighter +10%#7C98C6
Darker −10%#42639A
Darker −20%#334C76
Darker −30%#243552
Darker −40%#141E2F
More saturated +25%#3A75D5
Less saturated −25%#768399

Channel breakdown

R88
G124
B183
Red88 (34.5%)
Green124 (48.6%)
Blue183 (71.8%)
Hue217.26°
Saturation (HSL)39.75%
Lightness53.14%
Dominant channelBlue
Hex per channelR 58 · G 7C · B B7

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Every value on this page was computed from “587cb7” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.