black

#000000

#637BCD

#637BCD

Contrast Ratio

5.25:1

Delta E

71.29

Very Different

50:50 Mix

Color Values

Format #000000 #637BCD
HEX #000000 #637BCD
RGB 0, 0, 0 99, 123, 205
HSL 0.0, 0.0%, 0.0% 226.4, 51.5%, 59.6%
HSV 0.0, 0.0%, 0.0% 226.4, 51.7%, 80.4%
CMYK 0%, 0%, 0%, 100% 51.7%, 40.0%, 0.0%, 19.6%
OKLCH 0.0 0.0 0.0 0.6017 0.1281 269.9

Contrast & Accessibility

5.25:1
AA Pass AA Large Pass AAA Fail AAA Large Pass

Text Readability

The quick brown fox jumps over the lazy dog

Text: #637BCD → Background: #000000

The quick brown fox jumps over the lazy dog

Text: #000000 → Background: #637BCD

Color Difference (Delta E)

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

Gradient

Color Mixing

CSS Gradient Code

background: linear-gradient(to right, #000000, #637BCD);
background: linear-gradient(135deg, #000000, #637BCD);

Explore Each Color

Related Comparisons