seagreen 1

#54FF9F

X11 color

Seagreen 1 (#54FF9F) is the brightest variant in the X11 Sea Green series, a vivid, electric green with a strong teal-mint quality that reads almost as a fluorescent green-cyan. The extreme brightness gives it an energetic, synthetic quality used in data visualisation, digital art, and contexts requiring a highly visible green that differentiates from standard greens. It evokes bioluminescent marine organisms and the vivid greens of tropical fish.

Color Values

HEX

#54FF9F

RGB

84, 255, 159

HSL

146.3, 100.0%, 66.5%

HSV

146.3, 67.1%, 100.0%

CMYK

67.1%, 0.0%, 37.6%, 0.0%

OKLCH

0.8901 0.1932 154.4

Properties

Color Psychology

Light greens evoke tranquility, health, and natural balance. They are the most restful colors for the human eye, requiring no focal adjustment, which is why hospitals and spas favor them. Pastel greens reduce anxiety and symbolize safety and permission across cultures.

Design Usage

Soft greens are the standard for success messages, positive status indicators, and health-related interfaces. They create calming background tones for dashboards and data-heavy applications. Combine them with white and medium gray for a clinical, trustworthy appearance in medical or fintech apps.

Color Harmonies

Color Blindness Simulation

CSS Usage

background-color: #54FF9F;
color: #54FF9F;
border-color: #54FF9F;
Nearest Tailwind: Green 400 #4ADE80

Tailwind Shades

Contrast Checker

Text on white

1.3:1

AA Fail AAA Fail

Text on black

16.18:1

AA Pass AAA Pass

Compare With

Frequently Asked Questions

What are the RGB, HSL, and CMYK values of #54FF9F?

RGB(84, 255, 159) · HSL(146.3, 100.0%, 66.5%) · CMYK(67.1%, 0.0%, 37.6%, 0.0%)

Does #54FF9F meet WCAG contrast on white?

1.3:1 — WCAG AA Fail, AAA Fail for normal text.

What text color is readable on #54FF9F?

Use 000000 text on a #54FF9F background; contrast on black is 16.18:1.