black

#000000

#EF103C

#EF103C

Contrast Ratio

4.81:1

Delta E

99.35

Very Different

50:50 Mix

Color Values

Format #000000 #EF103C
HEX #000000 #EF103C
RGB 0, 0, 0 239, 16, 60
HSL 0.0, 0.0%, 0.0% 348.2, 87.5%, 50.0%
HSV 0.0, 0.0%, 0.0% 348.2, 93.3%, 93.7%
CMYK 0%, 0%, 0%, 100% 0.0%, 93.3%, 74.9%, 6.3%
OKLCH 0.0 0.0 0.0 0.6052 0.2386 21.3

Contrast & Accessibility

4.81:1
AA Pass AA Large Pass AAA Fail AAA Large Pass

Text Readability

The quick brown fox jumps over the lazy dog

Text: #EF103C → Background: #000000

The quick brown fox jumps over the lazy dog

Text: #000000 → Background: #EF103C

Color Difference (Delta E)

99.35 Very Different
0 — Identical 5 — Similar 25 — Noticeable 100 — Very Different

Gradient

Color Mixing

CSS Gradient Code

background: linear-gradient(to right, #000000, #EF103C);
background: linear-gradient(135deg, #000000, #EF103C);

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