Nerdulator> put something in

Recognised as Colour

#21645D

  • #21645D
  • Cyan
  • Dark
  • Nearest: Dark slate grey

#21645D is a cyan with RGB values 33, 100, 93 and HSL 174°, 50%, 26%. It is a dark colour, so white text on it reaches 6.9:1 contrast (AA for normal text). The nearest named colour is Dark slate grey.

Colour values

#21645D#21645D
HEX#21645D
RGBrgb(33, 100, 93)
RGB (0–1)0.1294, 0.3922, 0.3647
RGB percentages12.9%, 39.2%, 36.5%
HSLhsl(173.7, 50.4%, 26.1%)
HSV / HSBhsv(173.7, 67%, 39.2%)
CMYK67%, 0%, 7%, 60.8%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer2,188,381
CSS custom property--colour: #21645D;

Brightness & contrast

Relative luminance0.10228WCAG 2.x, 0 is black and 1 is white
Perceived brightness84.7 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 6.9:1
Contrast with white6.9:1WCAG normal text: AA
Contrast with black3.05:1WCAG normal text: Fail
Greyscale equivalent#555555
Inverted#DE9BA2

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#5F5E5Dno red cones; affects about 1% of men; ΔE 23.1 from the original
Deuteranopia#55575Eno green cones; the most common form, about 1% of men; ΔE 23.6 from the original
Tritanopia#006662no blue cones; rare, and affects men and women equally; ΔE 4.2 from the original
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text6.9:1WCAG large text: AAA
Contrast with black, large text3.05:1WCAG large text: AA

Named colours

Dark slate grey · ΔE 13.1Teal · ΔE 13.3Dark cyan · ΔE 17.4Dim grey · ΔE 23.6Cadetblue · ΔE 23.7Slate grey · ΔE 26.5
Nearest named CSS colourDark slate grey (#2F4F4F)ΔE 13.07, a distinctly different colour
Hue familycyan
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#642128
Analogous#21643C, #214A64
Triadic#5D2164, #645D21
Split complementary#64214A, #643B21
Tetradic#3C2164, #642128, #4A6421

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#7DD4CB
Lighter +30%#57C7BC
Lighter +20%#3AB1A4
Lighter +10%#2E8A81
Darker −10%#143E39
Darker −20%#081716
Darker −30%#000000
Darker −40%#000000
More saturated +25%#10756A
Less saturated −25%#325350

Channel breakdown

R33
G100
B93
Red33 (12.9%)
Green100 (39.2%)
Blue93 (36.5%)
Hue173.73°
Saturation (HSL)50.38%
Lightness26.08%
Dominant channelGreen
Hex per channelR 21 · G 64 · B 5D

Keep nerding

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

Nerdulate something else

Nothing in mind? Surprise me · today’s page

Every value on this page was computed from “21645d” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.