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Recognised as Colour

#23557D

  • #23557D
  • Blue
  • Dark
  • Nearest: Steel blue

#23557D is a blue with RGB values 35, 85, 125 and HSL 207°, 56%, 31%. It is a dark colour, so white text on it reaches 7.9:1 contrast (AAA for normal text). The nearest named colour is Steel blue.

Colour values

#23557D#23557D
HEX#23557D
RGBrgb(35, 85, 125)
RGB (0–1)0.1373, 0.3333, 0.4902
RGB percentages13.7%, 33.3%, 49%
HSLhsl(206.7, 56.3%, 31.4%)
HSV / HSBhsv(206.7, 72%, 49%)
CMYK72%, 32%, 0%, 51%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer2,315,645
CSS custom property--colour: #23557D;

Brightness & contrast

Relative luminance0.08335WCAG 2.x, 0 is black and 1 is white
Perceived brightness79.9 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 7.87:1
Contrast with white7.87:1WCAG normal text: AAA
Contrast with black2.67:1WCAG normal text: Fail
Greyscale equivalent#4D4D4D
Inverted#DCAA82

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#43567Fno red cones; affects about 1% of men; ΔE 7.8 from the original
Deuteranopia#374E7Cno green cones; the most common form, about 1% of men; ΔE 8.5 from the original
Tritanopia#005F63no blue cones; rare, and affects men and women equally; ΔE 26.7 from the original
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text7.87:1WCAG large text: AAA
Contrast with black, large text2.67:1WCAG large text: Fail

Named colours

Steel blue · ΔE 18.5Slate grey · ΔE 24.8Dark slate grey · ΔE 25.7Light slate grey · ΔE 26.8Dim grey · ΔE 29.3Dark slateblue · ΔE 32.4
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#7D4B23
Analogous#237D78, #23287D
Triadic#7D2355, #557D23
Split complementary#7D2328, #7D7823
Tetradic#78237D, #7D4B23, #287D23

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#8DBBDF
Lighter +30%#65A3D4
Lighter +20%#3D8BC9
Lighter +10%#2E70A5
Darker −10%#183A55
Darker −20%#0D1F2D
Darker −30%#020405
Darker −40%#000000
More saturated +25%#0F5791
Less saturated −25%#375369

Channel breakdown

R35
G85
B125
Red35 (13.7%)
Green85 (33.3%)
Blue125 (49%)
Hue206.67°
Saturation (HSL)56.25%
Lightness31.37%
Dominant channelBlue
Hex per channelR 23 · G 55 · B 7D

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Every value on this page was computed from “23557d” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.