#338B66
Closest named color: Viridian (#1E9167). oklch(57.4% 0.102 162.3), rgb(51, 139, 102).
Aa
Black text reads best on this color (5.02:1).
About this color
#338B66 is a medium-dark, moderately saturated green. In OKLCH its lightness is 57%, its chroma 0.102 and its hue 162°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Viridian (#1E9167), ΔE 0.019 away. Black text reads best on it, at 5.02:1.
| Hue family | Greens |
| Lightness | medium-dark (57%) |
| Chroma | moderately saturated (0.102) |
| Temperature | in between |
| Nearest name | Viridian (#1E9167) |
| Black text | 5.02:1 |
| White text | 4.17:1 |
Values
| HEX | #338B66 |
| RGB | rgb(51, 139, 102) |
| HSL | hsl(155, 46%, 37%) |
| OKLCH | oklch(57.4% 0.102 162.3) |
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 #338B66 | 4.17:1 | AA large text | Lc -74.0 | Content text, not long reading |
| Black text on #338B66 | 5.02:1 | AA | Lc 35.6 | Non-text elements, placeholder text |
| #338B66 text on white | 4.17:1 | AA large text | Lc 68.5 | Content text, not long reading |
| #338B66 text on black | 5.02:1 | 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
#CBDFD4
oklch(88.6% 0.026 161.9)
-
Step 300
300
#A7CAB8
oklch(80.8% 0.045 162.9)
-
Step 400
400
#76AF93
oklch(70.6% 0.073 162.5)
-
Step 500
500
#4E9B78
oklch(63% 0.094 162.3)
-
Step 600
600 (this color)
#338B66
oklch(57.4% 0.102 162.3)
-
Step 700
700
#1E7150
oklch(49.1% 0.095 162.2)
-
Step 800
800
#1C5C42
oklch(42.7% 0.078 162.6)
-
Step 900
900
#1E4C38
oklch(37.8% 0.062 162.5)
-
Step 950
950
#132C21
oklch(26.9% 0.038 163.5)
#338B66 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) | #898164 | 0.099 |
| Deuteranopia (no green cones) | #7D7868 | 0.097 |
| Tritanopia (no blue cones) | #008B81 | 0.042 |
| Achromatopsia (no color) | #7C7C7C | 0.103 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #338B66
#338B66
oklch(57.4% 0.102 162.3)
- #A15F89
#A15F89
oklch(57.3% 0.102 342.1)
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 #338B66, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Viridian #1E9167 ΔE 0.019
- Sea Green #2E8B57 ΔE 0.022
- Dark Sage #598556 ΔE 0.036
- Light Forest Green #4F9153 ΔE 0.041
- Ocean Green #3D9973 ΔE 0.044
- Fern Green #548D44 ΔE 0.050
- Slate Green #658D6D ΔE 0.051
- Dusty Teal #4C9085 ΔE 0.053
Use #338B66 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.