black

#000000

#637FBC

#637FBC

Contrast Ratio

5.29:1

Delta E

64.32

Very Different

50:50 Mix

Color Values

Format #000000 #637FBC
HEX #000000 #637FBC
RGB 0, 0, 0 99, 127, 188
HSL 0.0, 0.0%, 0.0% 221.1, 39.9%, 56.3%
HSV 0.0, 0.0%, 0.0% 221.1, 47.3%, 73.7%
CMYK 0%, 0%, 0%, 100% 47.3%, 32.4%, 0.0%, 26.3%
OKLCH 0.0 0.0 0.0 0.6009 0.0991 264.8

Contrast & Accessibility

5.29:1
AA Pass AA Large Pass AAA Fail AAA Large Pass

Text Readability

The quick brown fox jumps over the lazy dog

Text: #637FBC → Background: #000000

The quick brown fox jumps over the lazy dog

Text: #000000 → Background: #637FBC

Color Difference (Delta E)

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

Gradient

Color Mixing

CSS Gradient Code

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

Explore Each Color

Related Comparisons