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Recognised as Colour

#123BCB

  • #123BCB
  • Blue
  • Dark
  • Nearest: Dark blue

#123BCB is a blue with RGB values 18, 59, 203 and HSL 227°, 84%, 43%. It is a dark colour, so white text on it reaches 8.4:1 contrast (AAA for normal text). The nearest named colour is Dark blue.

Colour values

#123BCB#123BCB
HEX#123BCB
RGBrgb(18, 59, 203)
RGB (0–1)0.0706, 0.2314, 0.7961
RGB percentages7.1%, 23.1%, 79.6%
HSLhsl(226.7, 83.7%, 43.3%)
HSV / HSBhsv(226.7, 91.1%, 79.6%)
CMYK91.1%, 70.9%, 0%, 20.4%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer1,194,955
CSS custom property--colour: #123BCB;

Brightness & contrast

Relative luminance0.07568WCAG 2.x, 0 is black and 1 is white
Perceived brightness82.7 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 8.35:1
Contrast with white8.35:1WCAG normal text: AAA
Contrast with black2.51:1WCAG normal text: Fail
Greyscale equivalent#3D3D3D
Inverted#EDC434

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#0057CFno red cones; affects about 1% of men; ΔE 20.7 from the original
Deuteranopia#0045C8no green cones; the most common form, about 1% of men; ΔE 9.4 from the original
Tritanopia#00647Fno blue cones; rare, and affects men and women equally; ΔE 79.9 from the original
Distinguishable without hueShifts in lightness toonever rely on hue alone to carry meaning
Contrast with white, large text8.35:1WCAG large text: AAA
Contrast with black, large text2.51:1WCAG large text: Fail

Named colours

Dark blue · ΔE 21.3Medium slateblue · ΔE 22.4Navy · ΔE 23.8Slate blue · ΔE 23.9Royal blue · ΔE 25.4Indigo · ΔE 28
Nearest named CSS colourDark blue (#00008B)ΔE 21.25, a distinctly different colour
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#CBA212
Analogous#1297CB, #4612CB
Triadic#CB123B, #3BCB12
Split complementary#CB4612, #97CB12
Tetradic#CB1297, #CBA212, #12CB46

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#B1C1F8
Lighter +30%#829BF4
Lighter +20%#5376F0
Lighter +10%#2451EC
Darker −10%#0E2D9C
Darker −20%#0A206D
Darker −30%#06123E
Darker −40%#010510
More saturated +25%#0031DD
Less saturated −25%#2E4AAF

Channel breakdown

R18
G59
B203
Red18 (7.1%)
Green59 (23.1%)
Blue203 (79.6%)
Hue226.7°
Saturation (HSL)83.71%
Lightness43.33%
Dominant channelBlue
Hex per channelR 12 · G 3B · B CB

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Every value on this page was computed from “123bcb” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.