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Recognised as Colour

#177CFD

  • #177CFD
  • Blue
  • Dark
  • Nearest: Royal blue

#177CFD is a blue with RGB values 23, 124, 253 and HSL 214°, 98%, 54%. It is a dark colour, so black text on it reaches 5.3:1 contrast (AA for normal text). The nearest named colour is Royal blue.

Colour values

#177CFD#177CFD
HEX#177CFD
RGBrgb(23, 124, 253)
RGB (0–1)0.0902, 0.4863, 0.9922
RGB percentages9%, 48.6%, 99.2%
HSLhsl(213.7, 98.3%, 54.1%)
HSV / HSBhsv(213.7, 90.9%, 99.2%)
CMYK90.9%, 51%, 0%, 0.8%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer1,539,325
CSS custom property--colour: #177CFD;

Brightness & contrast

Relative luminance0.21689WCAG 2.x, 0 is black and 1 is white
Perceived brightness128.4 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundBlackcontrast 5.34:1
Contrast with white3.93:1WCAG normal text: Fail
Contrast with black5.34:1WCAG normal text: AA
Greyscale equivalent#707070
Inverted#E88302

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#1D8BFFno red cones; affects about 1% of men; ΔE 11 from the original
Deuteranopia#0077FAno green cones; the most common form, about 1% of men; ΔE 2.5 from the original
Tritanopia#009CB1no blue cones; rare, and affects men and women equally; ΔE 69.9 from the original
Distinguishable without hueShifts in lightness toonever rely on hue alone to carry meaning
Contrast with white, large text3.93:1WCAG large text: AA
Contrast with black, large text5.34:1WCAG large text: AAA

Named colours

Royal blue · ΔE 9.9Dodgerblue · ΔE 14.9Medium slateblue · ΔE 20.9Slate blue · ΔE 21.9Cornflower blue · ΔE 26.4Medium purple · ΔE 26.5
Nearest named CSS colourRoyal blue (#4169E1)ΔE 9.94, clearly different but related
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#FD9817
Analogous#17EFFD, #2517FD
Triadic#FD177C, #7CFD17
Split complementary#FD2517, #EFFD17
Tetradic#FD17EF, #FD9817, #17FD25

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#E1EEFF
Lighter +30%#AFD2FE
Lighter +20%#7CB5FE
Lighter +10%#4A99FD
Darker −10%#0263DF
Darker −20%#014DAD
Darker −30%#01367A
Darker −40%#012047
More saturated +25%#157CFF
Less saturated −25%#3480E0

Channel breakdown

R23
G124
B253
Red23 (9%)
Green124 (48.6%)
Blue253 (99.2%)
Hue213.65°
Saturation (HSL)98.29%
Lightness54.12%
Dominant channelBlue
Hex per channelR 17 · G 7C · B FD

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Every value on this page was computed from “177cfd” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.