Colour

#FF1D21

#FF1D21
Red
Dark
Nearest: Red

#FF1D21 is a red with RGB values 255, 29, 33 and HSL 359°, 100%, 56%. It is a dark colour, so black text on it reaches 5.4:1 contrast (AA for normal text). The nearest named colour is Red.

Colour values

#FF1D21#FF1D21

HEX#FF1D21

RGBrgb(255, 29, 33)

RGB (0–1)1, 0.1137, 0.1294

RGB percentages100%, 11.4%, 12.9%

HSLhsl(358.9, 100%, 55.7%)

HSV / HSBhsv(358.9, 88.6%, 100%)

CMYK0%, 88.6%, 87.1%, 0%≈naive device-independent conversion; real print needs an ICC profile

24-bit integer16,719,137

CSS custom property--colour: #FF1D21;

Brightness & contrast

Relative luminance0.22249WCAG 2.x, 0 is black and 1 is white

Perceived brightness141.6 of 255ITU-R BT.601 weighting

Light or darkDark

Best text colour on this backgroundBlackcontrast 5.45:1

Contrast with white3.85:1WCAG normal text: Fail

Contrast with black5.45:1WCAG normal text: AA

Greyscale equivalent#4D4D4D

Inverted#00E2DE

Colour vision & accessibility

Normal vision Protanopia Deuteranopia Tritanopia

Protanopia#70631Cno red cones; affects about 1% of men; ΔE 83.9 from the original

Deuteranopia#A5920Bno green cones; the most common form, about 1% of men; ΔE 83.5 from the original

Tritanopia#FF0024no blue cones; rare, and affects men and women equally; ΔE 3.6 from the original

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

Contrast with white, large text3.85:1WCAG large text: AA

Contrast with black, large text5.45:1WCAG large text: AAA

Named colours

Red · ΔE 10.1 Orange red · ΔE 15.5 Tomato · ΔE 24.1 Crimson · ΔE 25.8 Firebrick · ΔE 33.1 Coral · ΔE 36.3

Nearest named CSS colourRed (#FF0000)ΔE 10.09, a distinctly different colour

Hue familyred

CSS keyword usableNo exact keyword

Colour harmonies

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

Complementary#1DFFFB

Analogous#FF1D92, #FF8A1D

Triadic#21FF1D, #1D21FF

Split complementary#1DFF8A, #1D92FF

Tetradic#92FF1D, #1DFFFB, #8A1DFF

Tints, shades & saturation

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

Lighter +40%#FFE9E9

Lighter +30%#FFB6B7

Lighter +20%#FF8385

Lighter +10%#FF5053

Darker −10%#E90004

Darker −20%#B60003

Darker −30%#830002

Darker −40%#500001

More saturated +25%#FF1D21

Less saturated −25%#E3393C

Channel breakdown

R255

G29

B33

Red255 (100%)

Green29 (11.4%)

Blue33 (12.9%)

Hue358.94°

Saturation (HSL)100%

Lightness55.69%

Dominant channelRed

Hex per channelR FF · G 1D · B 21

Keep nerding

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

#FF1D21

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

Nerdulate something else