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Colour

#645A01

  • #645A01
  • Yellow
  • Dark
  • Nearest: Olive

#645A01 is a yellow with RGB values 100, 90, 1 and HSL 54°, 98%, 20%. It is a dark colour, so white text on it reaches 7:1 contrast (AA for normal text). The nearest named colour is Olive.

Colour values

#645A01#645A01
HEX#645A01
RGBrgb(100, 90, 1)
RGB (0–1)0.3922, 0.3529, 0.0039
RGB percentages39.2%, 35.3%, 0.4%
HSLhsl(53.9, 98%, 19.8%)
HSV / HSBhsv(53.9, 99%, 39.2%)
CMYK0%, 10%, 99%, 60.8%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer6,576,641
CSS custom property--colour: #645A01;

Brightness & contrast

Relative luminance0.10024WCAG 2.x, 0 is black and 1 is white
Perceived brightness88 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 6.99:1
Contrast with white6.99:1WCAG normal text: AA
Contrast with black3:1WCAG normal text: Fail
Greyscale equivalent#565656
Inverted#9BA5FE

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#645700no red cones; affects about 1% of men; ΔE 2 from the original
Deuteranopia#675B0Ano green cones; the most common form, about 1% of men; ΔE 2.3 from the original
Tritanopia#6D524Cno blue cones; rare, and affects men and women equally; ΔE 40.2 from the original
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text6.99:1WCAG large text: AAA
Contrast with black, large text3:1WCAG large text: AA

Named colours

Olive · ΔE 19.8Dark olivegreen · ΔE 20.4Olivedrab · ΔE 29Dark goldenrod · ΔE 31.5Saddle brown · ΔE 31.8Peru · ΔE 35.8
Nearest named CSS colourOlive (#808000)ΔE 19.82, a distinctly different colour
Hue familyyellow
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#010B64
Analogous#642901, #3D6401
Triadic#01645A, #5A0164
Split complementary#013C64, #290164
Tetradic#016428, #010B64, #64013C

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#FDE934
Lighter +30%#FBE203
Lighter +20%#C9B502
Lighter +10%#968702
Darker −10%#322D00
Darker −20%#000000
Darker −30%#000000
Darker −40%#000000
More saturated +25%#655B00
Less saturated −25%#57500E

Channel breakdown

R100
G90
B1
Red100 (39.2%)
Green90 (35.3%)
Blue1 (0.4%)
Hue53.94°
Saturation (HSL)98.02%
Lightness19.8%
Dominant channelRed
Hex per channelR 64 · G 5A · B 01

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Every value on this page was computed from “645a01” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.