#31573B
Closest named color: Pine (#2B5D34). oklch(42% 0.064 151.3), rgb(49, 87, 59).
Aa
White text reads best on this color (8.21:1).
About this color
#31573B is a dark, muted green. In OKLCH its lightness is 42%, its chroma 0.064 and its hue 151°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Pine (#2B5D34), ΔE 0.026 away. White text reads best on it, at 8.21:1.
| Hue family | Greens |
| Lightness | dark (42%) |
| Chroma | muted (0.064) |
| Temperature | in between |
| Nearest name | Pine (#2B5D34) |
| Black text | 2.55:1 |
| White text | 8.21:1 |
Values
| HEX | #31573B |
| RGB | rgb(49, 87, 59) |
| HSL | hsl(136, 28%, 27%) |
| OKLCH | oklch(42% 0.064 151.3) |
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 #31573B | 8.21:1 | AAA | Lc -92.9 | Preferred for body text |
| Black text on #31573B | 2.55:1 | Fails | Lc 15.7 | Dividers and decoration only |
| #31573B text on white | 8.21:1 | AAA | Lc 88.3 | Fine for body text |
| #31573B text on black | 2.55:1 | Fails | Lc -13.9 | Not readable |
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 800.
-
Step 50
50
#F3F6F4
oklch(97% 0.004 157.2)
-
Step 100
100
#E5ECE6
oklch(93.6% 0.011 149.9)
-
Step 200
200
#D0DDD2
oklch(88.5% 0.02 150.1)
-
Step 300
300
#B0C8B5
oklch(80.9% 0.037 151.6)
-
Step 400
400
#86AC8E
oklch(70.8% 0.06 151)
-
Step 500
500
#669772
oklch(63.1% 0.077 151.4)
-
Step 600
600
#4D815A
oklch(55.5% 0.083 151)
-
Step 700
700
#3D6D4A
oklch(49% 0.077 151.4)
-
Step 800
800 (this color)
#31573B
oklch(42% 0.064 151.3)
-
Step 900
900
#2D4934
oklch(37.6% 0.049 151.4)
-
Step 950
950
#1B2B1F
oklch(27.1% 0.031 151.7)
#31573B 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) | #575139 | 0.055 |
| Deuteranopia (no green cones) | #524D3D | 0.055 |
| Tritanopia (no blue cones) | #2A5650 | 0.035 |
| Achromatopsia (no color) | #4F4F4F | 0.064 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #31573B
#31573B
oklch(42% 0.064 151.3)
- #61405D
#61405D
oklch(42% 0.063 330.9)
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 #31573B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Pine #2B5D34 ΔE 0.026
- Spruce #0A5F38 ΔE 0.037
- Dark Blue Green #005249 ΔE 0.045
- Dark Green Blue #1F6357 ΔE 0.047
- Dark Slate Gray #2F4F4F ΔE 0.049
- Navy Green #35530A ΔE 0.051
- Deep Teal #00555A ΔE 0.058
- Army Green #4B5D16 ΔE 0.058
Use #31573B 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.