#338657
Closest named color: Sea Green (#2E8B57). oklch(55.7% 0.109 155.4), rgb(51, 134, 87).
Aa
Black text reads best on this color (4.68:1).
About this color
#338657 is a medium-dark, moderately saturated green. In OKLCH its lightness is 56%, its chroma 0.109 and its hue 155°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Sea Green (#2E8B57), ΔE 0.015 away. Black text reads best on it, at 4.68:1.
| Hue family | Greens |
| Lightness | medium-dark (56%) |
| Chroma | moderately saturated (0.109) |
| Temperature | in between |
| Nearest name | Sea Green (#2E8B57) |
| Black text | 4.68:1 |
| White text | 4.47:1 |
Values
| HEX | #338657 |
| RGB | rgb(51, 134, 87) |
| HSL | hsl(146, 45%, 36%) |
| OKLCH | oklch(55.7% 0.109 155.4) |
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 #338657 | 4.47:1 | AA large text | Lc -76.3 | Fine for body text |
| Black text on #338657 | 4.68:1 | AA | Lc 33.3 | Non-text elements, placeholder text |
| #338657 text on white | 4.47:1 | AA large text | Lc 70.8 | Content text, not long reading |
| #338657 text on black | 4.68:1 | AA | Lc -30.9 | 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
#F2F7F3
oklch(97.1% 0.007 151.9)
-
Step 100
100
#E3EDE6
oklch(93.7% 0.014 155.6)
-
Step 200
200
#CCDFD1
oklch(88.6% 0.028 153.8)
-
Step 300
300
#A8CBB3
oklch(81% 0.05 155.2)
-
Step 400
400
#78B08C
oklch(70.8% 0.079 155.6)
-
Step 500
500
#529B6F
oklch(63% 0.1 155.7)
-
Step 600
600 (this color)
#338657
oklch(55.7% 0.109 155.4)
-
Step 700
700
#247147
oklch(49% 0.101 155.6)
-
Step 800
800
#205C3A
oklch(42.6% 0.084 155.3)
-
Step 900
900
#214C32
oklch(37.8% 0.066 155)
-
Step 950
950
#142C1E
oklch(26.9% 0.04 156.7)
#338657 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) | #857C54 | 0.097 |
| Deuteranopia (no green cones) | #7A745A | 0.095 |
| Tritanopia (no blue cones) | #12857A | 0.053 |
| Achromatopsia (no color) | #777777 | 0.110 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #338657
#338657
oklch(55.7% 0.109 155.4)
- #9A598C
#9A598C
oklch(55.6% 0.109 335.4)
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 #338657, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Sea Green #2E8B57 ΔE 0.015
- Viridian #1E9167 ΔE 0.033
- Dark Sage #598556 ΔE 0.035
- Jungle Green #048243 ΔE 0.038
- Light Forest Green #4F9153 ΔE 0.045
- Fern Green #548D44 ΔE 0.046
- Military Green #667C3E ΔE 0.055
- Swamp #698339 ΔE 0.057
Use #338657 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.