FF6347 (tomato) — RGB, HSL, CMYK and Contrast

Q: What text colour should sit on FF6347?

Black gives 7.13:1 and white gives 2.95:1, so black wins at 7.13:1. That clears the 4.5:1 AA threshold for normal text and the 7:1 AAA threshold as well.

Every value recomputed from the hex code · WCAG 2.1 contrast ratios

A red at 64% lightness and 100% saturation, which puts it at 2.95:1 against white and 7.13:1 against black. The tables below give the notation conversions, the tints and shades that keep the hue intact, and the harmonies that pair with it.

FF6347

Notation conversions

Notation	Value
HEX	`FF6347`
RGB	rgb(255, 99, 71)
HSL	hsl(9, 100%, 64%)
CMYK	cmyk(0%, 61%, 72%, 0%)
Relative luminance	0.3064
Perceived brightness	55.9 / 100

R=255 G=99 B=71 · hue 9.1° · saturation 100.0% · lightness 63.9%

Contrast against pure white and pure black

Pair this colour with the two extremes to see which is the safer text partner. AA needs 4.5:1 for body text and 3:1 for large text; AAA raises that to 7:1 and 4.5:1.

Against	Hex	Ratio	AA text	AA large	AAA text
#FFFFFF	`white`	2.95:1	fail	fail	fail
#000000	`black`	7.13:1	pass	pass	pass

Tints and shades

Lightness moves in ten-point steps while hue and saturation stay fixed, which keeps the colour recognisable in a scale. The last column is the ratio against white text, useful for deciding where a scale stops working as a background.

Step	Hex	HSL	vs white text
shade -30	`#ad1a00`	hsl(9, 100%, 34%)	7.18:1
shade -20	`#e02200`	hsl(9, 100%, 44%)	4.77:1
shade -10	`#ff3814`	hsl(9, 100%, 54%)	3.60:1
tint +10	`#ff8e7a`	hsl(9, 100%, 74%)	2.23:1
tint +20	`#ffb9ad`	hsl(9, 100%, 84%)	1.64:1
tint +30	`#ffe5e0`	hsl(9, 100%, 94%)	1.20:1

Harmonies

Scheme	Hex
Complementary	`#47e3ff`
Analogous −30	`#ff4787`
Analogous +30	`#ffbf47`
Triadic −120	`#6347ff`
Triadic +120	`#47ff63`

Read back from the notation table, FF6347 is rgb(255, 99, 71), which normalises to hue 9.1° at 100.0% saturation and 63.9% lightness. Its relative luminance of 0.3064 is what produces the two ratios above: 2.95:1 against white and 7.13:1 against black, a gap of 4.18. Position 6 of 69 in the colour library, it darkens to #ad1a00 thirty points lower on the lightness axis and lifts to #ffe5e0 thirty higher, while the complementary rotation lands on #47e3ff.

Nearby colours

FF0000 red FF5722 Deep Orange 500 F44336 Red 500 FA8072 salmon 795548 Brown 500 A0522D sienna

Frequently asked questions

What text colour should sit on FF6347?
Black gives 7.13:1 and white gives 2.95:1, so black wins at 7.13:1. That clears the 4.5:1 AA threshold for normal text and the 7:1 AAA threshold as well.

Do the CMYK numbers match a print workflow?
They are the naive conversion from RGB, which assumes no ink limit, no colour profile and no black generation strategy. Real print work needs a profile-aware conversion; the values here are the ones the converter reports and are best used as a starting point for a designer rather than a press-ready separations file.

Convert any other colour, or test a pair against each other, in the ColrShift colour converter and contrast checker. The colour library groups every entry on this site by hue family.