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Recognised as Colour

#1971B5

  • #1971B5
  • Blue
  • Dark
  • Nearest: Steel blue

#1971B5 is a blue with RGB values 25, 113, 181 and HSL 206°, 76%, 40%. It is a dark colour, so white text on it reaches 5.2:1 contrast (AA for normal text). The nearest named colour is Steel blue.

Colour values

#1971B5#1971B5
HEX#1971B5
RGBrgb(25, 113, 181)
RGB (0–1)0.098, 0.4431, 0.7098
RGB percentages9.8%, 44.3%, 71%
HSLhsl(206.2, 75.7%, 40.4%)
HSV / HSBhsv(206.2, 86.2%, 71%)
CMYK86.2%, 37.6%, 0%, 29%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer1,667,509
CSS custom property--colour: #1971B5;

Brightness & contrast

Relative luminance0.15353WCAG 2.x, 0 is black and 1 is white
Perceived brightness106.9 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 5.16:1
Contrast with white5.16:1WCAG normal text: AA
Contrast with black4.07:1WCAG normal text: Fail
Greyscale equivalent#636363
Inverted#E68E4A

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#5075B8no red cones; affects about 1% of men; ΔE 8.3 from the original
Deuteranopia#3967B4no green cones; the most common form, about 1% of men; ΔE 10.3 from the original
Tritanopia#00818Ano blue cones; rare, and affects men and women equally; ΔE 39.7 from the original
Distinguishable without hueShifts in lightness toonever rely on hue alone to carry meaning
Contrast with white, large text5.16:1WCAG large text: AAA
Contrast with black, large text4.07:1WCAG large text: AA

Named colours

Steel blue · ΔE 13.2Cornflower blue · ΔE 19.3Dodgerblue · ΔE 26.3Dark slateblue · ΔE 29.9Deep skyblue · ΔE 32Slate grey · ΔE 33.1
Nearest named CSS colourSteel blue (#4682B4)ΔE 13.18, a distinctly different colour
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#B55D19
Analogous#19B5AB, #1923B5
Triadic#B51971, #71B519
Split complementary#B51923, #B5AB19
Tetradic#AB19B5, #B55D19, #23B519

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#A7D2F3
Lighter +30%#7ABBED
Lighter +20%#4EA4E6
Lighter +10%#218DE0
Darker −10%#135588
Darker −20%#0D395B
Darker −30%#061D2F
Darker −40%#000102
More saturated +25%#0074CE
Less saturated −25%#336E9B

Channel breakdown

R25
G113
B181
Red25 (9.8%)
Green113 (44.3%)
Blue181 (71%)
Hue206.15°
Saturation (HSL)75.73%
Lightness40.39%
Dominant channelBlue
Hex per channelR 19 · G 71 · B B5

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Every value on this page was computed from “1971b5” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.