What is the hex code for Sea Green?

Sea Green is #2e8b57. In CSS the keyword seagreen, the hex #2e8b57, rgb(46, 139, 87) and hsl(146, 50%, 36%) all paint the same color.

What is the opposite of Sea Green on the color wheel?

The opposite (complementary) color is #8b2e62, the same saturation and lightness rotated 180° around the HSL wheel. Complementary pairs give the strongest contrast, which is why the complement should be used sparingly rather than at equal weight.

Can I use Sea Green for text?

Sea Green as text on white has a contrast ratio of 4.25:1, which fails WCAG AA for body text (4.5:1) but passes for large text and UI components (3:1). On black it is 4.95:1, which passes for body text. Use it as text on dark surfaces, or as a fill with dark text on top.

CSS color names · Greens

Sea Green color: hex #2e8b57, RGB and HSL

Sea Green is the CSS keyword seagreen, hex #2e8b57, rgb(46, 139, 87), hsl(146, 50%, 36%). It is a dark, muted green in the greens family. Below: the colors that go with it, its tints and shades, how it reads as text, and a complete interface palette built from it.

CSS name: seagreen
Hex: #2e8b57
RGB: rgb(46, 139, 87)
HSL: hsl(146, 50%, 36%)
On white: 4.25:1 — large text and UI only (3:1)
On black: 4.95:1 — passes AA for body text

.example {
  color: seagreen;          /* keyword */
  color: #2e8b57;          /* hex */
  color: rgb(46, 139, 87); /* rgb */
  color: hsl(146, 50%, 36%); /* hsl */
}

What colors go with sea green

Each match keeps sea green's saturation and lightness and rotates only the hue, so the relationship is the wheel's and nothing else. Any of these can be an accent beside sea green as the primary; the harmony guides explain which rule suits which interface.

Complementary

The opposite hue, 180° away — the strongest contrast, best kept to one accent per screen.

#8b2e62

Split-complementary

The two neighbors of the complement, at 150° and 210° — most of the contrast with less tension, and two accents instead of one.

#862e8b

#8b2e33

Triadic

Two hues at 120° and 240° — three evenly spaced signals, the scheme charts and category colors want.

#572e8b

#8b572e

Analogous

The neighbors at −30° and +30° — calm and cohesive, with emphasis coming from weight and size rather than hue.

#338b2e

#2e8b86

Tints and shades of sea green

Tints add lightness toward white; shades remove it toward black. The hue and saturation stay fixed, so every step still reads as sea green — these are the hover, pressed, disabled and surface variants a single brand color needs.

Tints (lighter)

#3bb470

#5cc98c

#85d7a9

#aee4c6

#d6f2e2

Shades (darker)

#267449

#1f5d3a

#17462c

#0f2e1d

#08170f

A UI color palette built from sea green

The eight semantic roles an interface actually uses, derived from sea green as the primary with the split-complementary rule: secondary and accent rotate around the wheel, and the five neutrals take the hue at lightness steps tuned for light and dark mode. This is the same derivation the palette generator runs — open it there to change the rule, drag the anchors, or export the set as CSS variables.

Light mode

primary: #2e8b57
secondary: #862e8b
accent: #8b2e33
background: #fcfdfc
surface: #f3f6f5
text: #122119
muted: #5c8a70
border: #e0ebe5

Dark mode

primary: #53c685
secondary: #bf53c6
accent: #c65359
background: #0f1a14
surface: #17261e
text: #f3f6f5
muted: #98b3a4
border: #2a4636

Open sea green in the palette generator

Using sea green in an interface

Green means success and 'on' — reserve one green for that job before you use another as a brand color. Sea green, forest green and teal are calm enough to lead a palette; the neon greens are for dark-mode accents and little else. Whichever role sea green takes, define it once as a token rather than repeating the keyword: the semantic palette guide covers the eight roles, and the guides to complementary, triadic and the other color schemes explain how to weight the matches above.

What is the hex code for Sea Green?: Sea Green is #2e8b57. In CSS the keyword seagreen, the hex #2e8b57, rgb(46, 139, 87) and hsl(146, 50%, 36%) all paint the same color.
What colors go with Sea Green?: Its complement is #8b2e62, the split-complementary pair is #862e8b and #8b2e33, the triadic partners are #572e8b and #8b572e, and the analogous neighbors are #338b2e and #2e8b86. In an interface, use Sea Green for most colored elements and one of these for a single accent, at roughly an 80/20 split.
What is the opposite of Sea Green on the color wheel?: The opposite (complementary) color is #8b2e62, the same saturation and lightness rotated 180° around the HSL wheel. Complementary pairs give the strongest contrast, which is why the complement should be used sparingly rather than at equal weight.
Can I use Sea Green for text?: Sea Green as text on white has a contrast ratio of 4.25:1, which fails WCAG AA for body text (4.5:1) but passes for large text and UI components (3:1). On black it is 4.95:1, which passes for body text. Use it as text on dark surfaces, or as a fill with dark text on top.