#399F74
Closest named color: Ocean Green (#3D9973). oklch(63.2% 0.115 162), rgb(57, 159, 116).
Aa
Black text reads best on this color (6.38:1).
About this color
#399F74 is a medium-light, moderately saturated green. In OKLCH its lightness is 63%, its chroma 0.115 and its hue 162°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Ocean Green (#3D9973), ΔE 0.018 away. Black text reads best on it, at 6.38:1.
| Hue family | Greens |
| Lightness | medium-light (63%) |
| Chroma | moderately saturated (0.115) |
| Temperature | in between |
| Nearest name | Ocean Green (#3D9973) |
| Black text | 6.38:1 |
| White text | 3.28:1 |
Values
| HEX | #399F74 |
| RGB | rgb(57, 159, 116) |
| HSL | hsl(155, 47%, 42%) |
| OKLCH | oklch(63.2% 0.115 162) |
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 #399F74 | 3.28:1 | AA large text | Lc -65.4 | Content text, not long reading |
| Black text on #399F74 | 6.38:1 | AA | Lc 44.1 | Non-text elements, placeholder text |
| #399F74 text on white | 3.28:1 | AA large text | Lc 59.9 | Large or bold text, headings |
| #399F74 text on black | 6.38:1 | AA | Lc -41.8 | 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 500.
-
Step 50
50
#F1F7F4
oklch(97.1% 0.007 164.9)
-
Step 100
100
#E1EDE6
oklch(93.5% 0.016 160.6)
-
Step 200
200
#C8E0D3
oklch(88.5% 0.031 162.1)
-
Step 300
300
#A1CCB6
oklch(80.8% 0.055 162.6)
-
Step 400
400
#6AB28F
oklch(70.6% 0.09 161.8)
-
Step 500
500 (this color)
#399F74
oklch(63.2% 0.115 162)
-
Step 600
600
#00895D
oklch(55.7% 0.122 162)
-
Step 700
700
#00734D
oklch(49.1% 0.108 161.8)
-
Step 800
800
#005E3F
oklch(42.6% 0.093 162.3)
-
Step 900
900
#0F4E35
oklch(37.8% 0.076 161.7)
-
Step 950
950
#0C2E1F
oklch(27.1% 0.049 161.3)
#399F74 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) | #9D9472 | 0.111 |
| Deuteranopia (no green cones) | #8F8A77 | 0.107 |
| Tritanopia (no blue cones) | #009F93 | 0.046 |
| Achromatopsia (no color) | #8E8E8E | 0.116 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #399F74
#399F74
oklch(63.2% 0.115 162)
- #B96C9D
#B96C9D
oklch(63.2% 0.116 342.2)
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 #399F74, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Ocean Green #3D9973 ΔE 0.018
- Jade #1FA774 ΔE 0.025
- Persian Green #2A9D8F ΔE 0.042
- Blue Green #0F9B8E ΔE 0.045
- Viridian #1E9167 ΔE 0.047
- Seaweed Green #35AD6B ΔE 0.047
- Dark Seafoam Green #3EAF76 ΔE 0.048
- Light Forest Green #4F9153 ΔE 0.049
Use #399F74 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.