Colour

#00577A

#00577A
Cyan
Dark
Nearest: Steel blue

#00577A is a cyan with RGB values 0, 87, 122 and HSL 197°, 100%, 24%. 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

#00577A#00577A

HEX#00577A

RGBrgb(0, 87, 122)

RGB (0–1)0, 0.3412, 0.4784

RGB percentages0%, 34.1%, 47.8%

HSLhsl(197.2, 100%, 23.9%)

HSV / HSBhsv(197.2, 100%, 47.8%)

CMYK100%, 28.7%, 0%, 52.2%≈naive device-independent conversion; real print needs an ICC profile

24-bit integer22,394

CSS custom property--colour: #00577A;

Brightness & contrast

Relative luminance0.08222WCAG 2.x, 0 is black and 1 is white

Perceived brightness78.4 of 255ITU-R BT.601 weighting

Light or darkDark

Best text colour on this backgroundWhitecontrast 7.94:1

Contrast with white7.94:1WCAG normal text: AAA

Contrast with black2.64:1WCAG normal text: Fail

Greyscale equivalent#474747

Inverted#FFA885

Colour vision & accessibility

Normal vision Protanopia Deuteranopia Tritanopia

Protanopia#46577Cno red cones; affects about 1% of men; ΔE 13.1 from the original

Deuteranopia#374D79no green cones; the most common form, about 1% of men; ΔE 14.1 from the original

Tritanopia#006063no blue cones; rare, and affects men and women equally; ΔE 22.3 from the original

Distinguishable without hueShifts in lightness toonever rely on hue alone to carry meaning

Contrast with white, large text7.94:1WCAG large text: AAA

Contrast with black, large text2.64:1WCAG large text: Fail

Named colours

Steel blue · ΔE 19.6 Dark slate grey · ΔE 22.7 Slate grey · ΔE 24.9 Light slate grey · ΔE 26.9 Dim grey · ΔE 29.2 Teal · ΔE 30.1

Nearest named CSS colourSteel blue (#4682B4)ΔE 19.59, a distinctly different colour

Hue familycyan

CSS keyword usableNo exact keyword

Colour harmonies

base +30°+90°+120°+180°+210°+240°+270°+330°

Complementary#7A2300

Analogous#007A60, #001A7A

Triadic#7A0057, #577A00

Split complementary#7A001A, #7A6000

Tetradic#60007A, #7A2300, #1A7A00

Tints, shades & saturation

+40%+30%+20%+10%base -10%-20%-30%-40%

Lighter +40%#47CAFF

Lighter +30%#14BCFF

Lighter +20%#00A0E0

Lighter +10%#007BAD

Darker −10%#003347

Darker −20%#000E14

Darker −30%#000000

Darker −40%#000000

More saturated +25%#00577A

Less saturated −25%#0F516B

Channel breakdown

G87

B122

Red0 (0%)

Green87 (34.1%)

Blue122 (47.8%)

Hue197.21°

Saturation (HSL)100%

Lightness23.92%

Dominant channelBlue

Hex per channelR 00 · G 57 · B 7A

Keep nerding

Every link below is a page Nerdulator can generate from what it already knows about this value.

#00577A

Colour values

Brightness & contrast

Colour vision & accessibility

Named colours

Colour harmonies

Tints, shades & saturation

Channel breakdown

Keep nerding

Harmonies

Lighter and darker

Similar named colours

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