black

#000000

#21CF0B

#21CF0B

Contrast Ratio

9.99:1

Delta E

123.91

Very Different

50:50 Mix

Color Values

Format #000000 #21CF0B
HEX #000000 #21CF0B
RGB 0, 0, 0 33, 207, 11
HSL 0.0, 0.0%, 0.0% 113.3, 89.9%, 42.7%
HSV 0.0, 0.0%, 0.0% 113.3, 94.7%, 81.2%
CMYK 0%, 0%, 0%, 100% 84.1%, 0.0%, 94.7%, 18.8%
OKLCH 0.0 0.0 0.0 0.743 0.247 142.0

Contrast & Accessibility

9.99:1
AA Pass AA Large Pass AAA Pass AAA Large Pass

Text Readability

The quick brown fox jumps over the lazy dog

Text: #21CF0B → Background: #000000

The quick brown fox jumps over the lazy dog

Text: #000000 → Background: #21CF0B

Color Difference (Delta E)

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

Gradient

Color Mixing

CSS Gradient Code

background: linear-gradient(to right, #000000, #21CF0B);
background: linear-gradient(135deg, #000000, #21CF0B);

Explore Each Color

Related Comparisons