#338B63
Closest named color: Sea Green (#2E8B57). oklch(57.3% 0.105 160.4), rgb(51, 139, 99).
Aa
Black text reads best on this color (5.01:1).
About this color
#338B63 is a medium-dark, moderately saturated green. In OKLCH its lightness is 57%, its chroma 0.105 and its hue 160°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Sea Green (#2E8B57), ΔE 0.018 away. Black text reads best on it, at 5.01:1.
| Hue family | Greens |
| Lightness | medium-dark (57%) |
| Chroma | moderately saturated (0.105) |
| Temperature | in between |
| Nearest name | Sea Green (#2E8B57) |
| Black text | 5.01:1 |
| White text | 4.18:1 |
Values
| HEX | #338B63 |
| RGB | rgb(51, 139, 99) |
| HSL | hsl(153, 46%, 37%) |
| OKLCH | oklch(57.3% 0.105 160.4) |
Contrast
WCAG 2 contrast ratios are the conformance target: AA needs 4.5:1 for body text and 3:1 for large text, AAA needs 7:1. APCA Lc values are supplementary guidance from the WCAG 3 drafts.
| Pair | WCAG 2 | Result | APCA | APCA guidance |
|---|---|---|---|---|
| White text on #338B63 | 4.18:1 | AA large text | Lc -74.1 | Content text, not long reading |
| Black text on #338B63 | 5.01:1 | AA | Lc 35.5 | Non-text elements, placeholder text |
| #338B63 text on white | 4.18:1 | AA large text | Lc 68.6 | Content text, not long reading |
| #338B63 text on black | 5.01:1 | AA | Lc -33.1 | Non-text elements, placeholder text |
Tints and shades
A 50–950 scale built in OKLCH: the hue is held, lightness follows a Tailwind v4-like curve, and every step is kept inside the sRGB gamut. This color sits at step 600.
-
Step 50
50
#F2F7F4
oklch(97.2% 0.007 160.1)
-
Step 100
100
#E2EDE7
oklch(93.6% 0.014 162.5)
-
Step 200
200
#CBDFD3
oklch(88.5% 0.027 159.5)
-
Step 300
300
#A7CBB6
oklch(81% 0.048 159.5)
-
Step 400
400
#76B091
oklch(70.8% 0.076 160.3)
-
Step 500
500
#4E9B76
oklch(63% 0.096 161)
-
Step 600
600 (this color)
#338B63
oklch(57.3% 0.105 160.4)
-
Step 700
700
#1E714E
oklch(49% 0.097 160.8)
-
Step 800
800
#1C5C40
oklch(42.6% 0.08 160.9)
-
Step 900
900
#1E4C36
oklch(37.7% 0.064 160.2)
-
Step 950
950
#132C20
oklch(26.9% 0.039 161.3)
#338B63 with color blindness
Simulated with the Machado et al. (2009) model. ΔE is how far the color moves: below about 0.02 you would not notice a change.
| Vision | Seen as | Shift (ΔE) |
|---|---|---|
| Protanopia (no red cones) | #898161 | 0.099 |
| Deuteranopia (no green cones) | #7D7866 | 0.097 |
| Tritanopia (no blue cones) | #008A80 | 0.046 |
| Achromatopsia (no color) | #7C7C7C | 0.106 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #338B63
#338B63
oklch(57.3% 0.105 160.4)
- #A15E8B
#A15E8B
oklch(57.2% 0.105 340.4)
Analogous
Neighbouring hues, 30° either side.
Split complementary
The two hues beside the complement (150° and 210°).
Triadic
Three hues spaced 120° apart.
Palettes with this color
Curated palettes that contain a color within ΔE 0.04 (OKLab) of #338B63, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Sea Green #2E8B57 ΔE 0.018
- Viridian #1E9167 ΔE 0.018
- Dark Sage #598556 ΔE 0.035
- Light Forest Green #4F9153 ΔE 0.039
- Ocean Green #3D9973 ΔE 0.045
- Fern Green #548D44 ΔE 0.047
- Slate Green #658D6D ΔE 0.053
- Jungle Green #048243 ΔE 0.054
Use #338B63 in your product
Turn it into light and dark UI roles checked for contrast, then export to Tailwind v4, shadcn/ui, CSS or design tokens.