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Recognised as Colour

#1A558B

  • #1A558B
  • Blue
  • Dark
  • Nearest: Steel blue

#1A558B is a blue with RGB values 26, 85, 139 and HSL 209°, 68%, 32%. It is a dark colour, so white text on it reaches 7.7:1 contrast (AAA for normal text). The nearest named colour is Steel blue.

Colour values

#1A558B#1A558B
HEX#1A558B
RGBrgb(26, 85, 139)
RGB (0–1)0.102, 0.3333, 0.5451
RGB percentages10.2%, 33.3%, 54.5%
HSLhsl(208.7, 68.5%, 32.4%)
HSV / HSBhsv(208.7, 81.3%, 54.5%)
CMYK81.3%, 38.8%, 0%, 45.5%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer1,725,835
CSS custom property--colour: #1A558B;

Brightness & contrast

Relative luminance0.08581WCAG 2.x, 0 is black and 1 is white
Perceived brightness81.5 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 7.73:1
Contrast with white7.73:1WCAG normal text: AAA
Contrast with black2.72:1WCAG normal text: Fail
Greyscale equivalent#4C4C4C
Inverted#E5AA74

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#3B588Dno red cones; affects about 1% of men; ΔE 5.7 from the original
Deuteranopia#2A4E8Ano green cones; the most common form, about 1% of men; ΔE 7 from the original
Tritanopia#006269no blue cones; rare, and affects men and women equally; ΔE 33.6 from the original
Distinguishable without hueShifts in lightness toonever rely on hue alone to carry meaning
Contrast with white, large text7.73:1WCAG large text: AAA
Contrast with black, large text2.72:1WCAG large text: Fail

Named colours

Steel blue · ΔE 18.5Dark slateblue · ΔE 25.7Slate grey · ΔE 30.6Cornflower blue · ΔE 31.2Light slate grey · ΔE 32.1Dark slate grey · ΔE 34.5
Nearest named CSS colourSteel blue (#4682B4)ΔE 18.47, a distinctly different colour
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#8B501A
Analogous#1A8B88, #1A1D8B
Triadic#8B1A55, #558B1A
Split complementary#8B1A1D, #8B881A
Tetradic#881A8B, #8B501A, #1D8B1A

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#88BBE9
Lighter +30%#5DA2E1
Lighter +20%#3289D9
Lighter +10%#226FB6
Darker −10%#123B60
Darker −20%#0A2035
Darker −30%#02060A
Darker −40%#000000
More saturated +25%#0556A0
Less saturated −25%#2F5476

Channel breakdown

R26
G85
B139
Red26 (10.2%)
Green85 (33.3%)
Blue139 (54.5%)
Hue208.67°
Saturation (HSL)68.48%
Lightness32.35%
Dominant channelBlue
Hex per channelR 1A · G 55 · B 8B

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Every value on this page was computed from “1a558b” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.