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Recognised as Colour

#258FA8

  • #258FA8
  • Cyan
  • Dark
  • Nearest: Cadetblue

#258FA8 is a cyan with RGB values 37, 143, 168 and HSL 191°, 64%, 40%. It is a dark colour, so black text on it reaches 5.6:1 contrast (AA for normal text). The nearest named colour is Cadetblue.

Colour values

#258FA8#258FA8
HEX#258FA8
RGBrgb(37, 143, 168)
RGB (0–1)0.1451, 0.5608, 0.6588
RGB percentages14.5%, 56.1%, 65.9%
HSLhsl(191.5, 63.9%, 40.2%)
HSV / HSBhsv(191.5, 78%, 65.9%)
CMYK78%, 14.9%, 0%, 34.1%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer2,461,608
CSS custom property--colour: #258FA8;

Brightness & contrast

Relative luminance0.22865WCAG 2.x, 0 is black and 1 is white
Perceived brightness125 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundBlackcontrast 5.57:1
Contrast with white3.77:1WCAG normal text: Fail
Contrast with black5.57:1WCAG normal text: AA
Greyscale equivalent#7A7A7A
Inverted#DA7057

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#7F8BA9no red cones; affects about 1% of men; ΔE 23.6 from the original
Deuteranopia#6D7EA8no green cones; the most common form, about 1% of men; ΔE 25 from the original
Tritanopia#009897no blue cones; rare, and affects men and women equally; ΔE 17.8 from the original
Distinguishable without hueShifts in lightness toonever rely on hue alone to carry meaning
Contrast with white, large text3.77:1WCAG large text: AA
Contrast with black, large text5.57:1WCAG large text: AAA

Named colours

Cadetblue · ΔE 15.5Dark cyan · ΔE 16.4Teal · ΔE 16.9Steel blue · ΔE 19.7Light slate grey · ΔE 21Slate grey · ΔE 21.5
Nearest named CSS colourCadetblue (#5F9EA0)ΔE 15.47, a distinctly different colour
Hue familycyan
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#A83E25
Analogous#25A87F, #254EA8
Triadic#A8258F, #8FA825
Split complementary#A8254E, #A87F25
Tetradic#7F25A8, #A83E25, #4EA825

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#ACE0ED
Lighter +30%#82D1E4
Lighter +20%#59C2DA
Lighter +10%#2FB2D1
Darker −10%#1C6B7E
Darker −20%#134854
Darker −30%#09242B
Darker −40%#000101
More saturated +25%#0B9FC2
Less saturated −25%#3F7F8E

Channel breakdown

R37
G143
B168
Red37 (14.5%)
Green143 (56.1%)
Blue168 (65.9%)
Hue191.45°
Saturation (HSL)63.9%
Lightness40.2%
Dominant channelBlue
Hex per channelR 25 · G 8F · B A8

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Every value on this page was computed from “258fa8” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.