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Recognised as Colour

#EF5900

  • #EF5900
  • Orange
  • Dark
  • Nearest: Orange red

#EF5900 is a orange with RGB values 239, 89, 0 and HSL 22°, 100%, 47%. It is a dark colour, so black text on it reaches 6.1:1 contrast (AA for normal text). The nearest named colour is Orange red.

Colour values

#EF5900#EF5900
HEX#EF5900
RGBrgb(239, 89, 0)
RGB (0–1)0.9373, 0.349, 0
RGB percentages93.7%, 34.9%, 0%
HSLhsl(22.3, 100%, 46.9%)
HSV / HSBhsv(22.3, 100%, 93.7%)
CMYK0%, 62.8%, 100%, 6.3%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer15,685,888
CSS custom property--colour: #EF5900;

Brightness & contrast

Relative luminance0.25495WCAG 2.x, 0 is black and 1 is white
Perceived brightness147.4 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundBlackcontrast 6.1:1
Contrast with white3.44:1WCAG normal text: Fail
Contrast with black6.1:1WCAG normal text: AA
Greyscale equivalent#727272
Inverted#10A6FF

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#867500no red cones; affects about 1% of men; ΔE 60.9 from the original
Deuteranopia#AA9700no green cones; the most common form, about 1% of men; ΔE 61.2 from the original
Tritanopia#FF2C4Cno blue cones; rare, and affects men and women equally; ΔE 37.8 from the original
Distinguishable without hueShifts in lightness toonever rely on hue alone to carry meaning
Contrast with white, large text3.44:1WCAG large text: AA
Contrast with black, large text6.1:1WCAG large text: AAA

Named colours

Orange red · ΔE 12.9Chocolate · ΔE 20.9Tomato · ΔE 21.7Dark orange · ΔE 23.2Coral · ΔE 24.2Red · ΔE 25.4
Nearest named CSS colourOrange red (#FF4500)ΔE 12.86, a distinctly different colour
Hue familyorange
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#0096EF
Analogous#EF001F, #EFD100
Triadic#00EF59, #5900EF
Split complementary#00EFD1, #001EEF
Tetradic#1EEF00, #0096EF, #D000EF

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#FFD5BC
Lighter +30%#FFB589
Lighter +20%#FF9556
Lighter +10%#FF7523
Darker −10%#BC4600
Darker −20%#893300
Darker −30%#562000
Darker −40%#230D00
More saturated +25%#EF5900
Less saturated −25%#D1611E

Channel breakdown

R239
G89
B0
Red239 (93.7%)
Green89 (34.9%)
Blue0 (0%)
Hue22.34°
Saturation (HSL)100%
Lightness46.86%
Dominant channelRed
Hex per channelR EF · G 59 · B 00

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Every value on this page was computed from “ef5900” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.