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Recognised as Colour

#017BBB

  • #017BBB
  • Blue
  • Dark
  • Nearest: Steel blue

#017BBB is a blue with RGB values 1, 123, 187 and HSL 201°, 99%, 37%. It is a dark colour, so white text on it reaches 4.6:1 contrast (AA for normal text). The nearest named colour is Steel blue.

Colour values

#017BBB#017BBB
HEX#017BBB
RGBrgb(1, 123, 187)
RGB (0–1)0.0039, 0.4824, 0.7333
RGB percentages0.4%, 48.2%, 73.3%
HSLhsl(200.6, 98.9%, 36.9%)
HSV / HSBhsv(200.6, 99.5%, 73.3%)
CMYK99.5%, 34.2%, 0%, 26.7%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer97,211
CSS custom property--colour: #017BBB;

Brightness & contrast

Relative luminance0.1776WCAG 2.x, 0 is black and 1 is white
Perceived brightness113.4 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 4.61:1
Contrast with white4.61:1WCAG normal text: AA
Contrast with black4.55:1WCAG normal text: AA
Greyscale equivalent#666666
Inverted#FE8444

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#5C7DBEno red cones; affects about 1% of men; ΔE 12.6 from the original
Deuteranopia#446EBAno green cones; the most common form, about 1% of men; ΔE 14.8 from the original
Tritanopia#008B92no blue cones; rare, and affects men and women equally; ΔE 37.4 from the original
Distinguishable without hueShifts in lightness toonever rely on hue alone to carry meaning
Contrast with white, large text4.61:1WCAG large text: AAA
Contrast with black, large text4.55:1WCAG large text: AAA

Named colours

Steel blue · ΔE 9.8Cornflower blue · ΔE 20.4Deep skyblue · ΔE 26.8Dodgerblue · ΔE 28.2Light slate grey · ΔE 31.2Slate grey · ΔE 31.2
Nearest named CSS colourSteel blue (#4682B4)ΔE 9.84, clearly different but related
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#BB4101
Analogous#01BB9E, #011EBB
Triadic#BB017B, #7BBB01
Split complementary#BB011E, #BB9E01
Tetradic#9E01BB, #BB4101, #1EBB01

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#8AD6FE
Lighter +30%#57C5FE
Lighter +20%#24B3FE
Lighter +10%#019CEE
Darker −10%#015A88
Darker −20%#003856
Darker −30%#001723
Darker −40%#000000
More saturated +25%#007BBC
Less saturated −25%#1874A3

Channel breakdown

R1
G123
B187
Red1 (0.4%)
Green123 (48.2%)
Blue187 (73.3%)
Hue200.65°
Saturation (HSL)98.94%
Lightness36.86%
Dominant channelBlue
Hex per channelR 01 · G 7B · B BB

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Every value on this page was computed from “017bbb” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.