Inspect Tomato (#FF6347) in HEX, RGB, HSL, LCH and OKLCH, check its contrast, and copy the value you need.
Tomato
#FF6347
Black text reads best on this background, at 7.13:1.
Tomato is one of the 148 CSS named colors, and resolves to #FF6347 in every browser. In numbers that is rgb(255, 99, 71) and hsl(9, 100%, 64%). Perceptually it is a mid-toned, vivid color: OKLCH puts its lightness at 70% and its chroma at 0.196. It sits in the reds at 32 degrees of OKLCH hue, and reads as a warm color.
White text only reaches 2.95:1 here, so black text is the safer pairing at 7.13:1. At this chroma it is loud enough to be an accent or a call to action, but it will fight anything else vivid placed next to it.
The closest CSS named colors to Tomato, measured with CIEDE2000, are Coral (#FF7F50), Salmon (#FA8072), OrangeRed (#FF4500). If Tomato is not quite right, those are the nearest keywords to try before reaching for a custom value.
HEX
#FF6347
RGB
rgb(255, 99, 71)
HSL
hsl(9, 100%, 64%)
HWB
hwb(9 28% 0%)
CMYK
cmyk(0%, 61%, 72%, 0%)
LAB
lab(62.99 59.36 47.88)
LCH
lch(62.99 76.27 38.89)
OKLCH
oklch(69.62% 0.1955 32.32)
WCAG asks for 4.5:1 between body text and its background. On #FF6347 white text measures 2.95:1 and black text 7.13:1, so black clears it and white does not.
White text on Tomato
WCAG 2.2
2.95:1
APCA
Lc 60
Fails AA body text
Fails AAA body text
Fails AA large text
Black text on Tomato
WCAG 2.2
7.13:1
APCA
Lc 49
Passes AA body text
Passes AAA body text
Passes AA large text
Check Tomato against any other color in the contrast checker.
Tomato sits at 70% OKLCH lightness. Holding its hue and chroma and moving only that value carries it up to #FFF6F4 and down to #130100, which keeps the family recognizable instead of letting it drift toward gray the way a plain HSL ramp does.
#FF8870
20% lighter
#FFA694
40% lighter
#FFC2B5
60% lighter
#FFDDD5
80% lighter
#FFF6F4
100% lighter
#D53B20
20% darker
#A51C00
40% darker
#700F00
60% darker
#3E0500
80% darker
#130100
100% darker
Build a full accessible scale from #FF6347 in the shade generator.
Hues rotated around #FF6347 in OKLCH, then pulled back into the sRGB gamut. Each swatch is labelled with the nearest CSS named color so you have a keyword to start from.
Tomato sits at 32 degrees. Rotating it a half turn lands on 212 degrees, the hue directly opposite. It is the strongest pairing you can make without changing lightness, and the one most likely to vibrate if you use both at full chroma.
The neighbors of Tomato at 2 and 62 degrees. They stay close enough to read as the same family, which is what you want for hover states, secondary surfaces and gradients.
32, 152 and 272 degrees divide the wheel into thirds. Balanced enough to carry a whole palette without one color dominating the other two.
Instead of the complement at 212 degrees, this pair flanks it at 182 and 242. You keep most of the contrast of a complementary pairing while losing the harshness.
Explore more combinations around Tomato on the color wheel.
The biggest shift is under protanopia, where #FF6347 reads as #807245, 34 CIEDE2000 units away. If Tomato is the only thing marking a state or a series, roughly one viewer in twelve will miss it.
Protanopia
#807245
Deuteranopia
#A38D46
Tritanopia
#FF535B
Achromatopsia
#828282
The nearest CSS keywords to #FF6347, ranked by perceptual distance rather than by how close their hex digits happen to look.