#31503B
Closest named color: Dark Slate Gray (#2F4F4F). oklch(40% 0.051 153.9), rgb(49, 80, 59).
Aa
White text reads best on this color (8.96:1).
About this color
#31503B is a dark, muted green. In OKLCH its lightness is 40%, its chroma 0.051 and its hue 154°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Dark Slate Gray (#2F4F4F), ΔE 0.034 away. White text reads best on it, at 8.96:1.
| Hue family | Greens |
| Lightness | dark (40%) |
| Chroma | muted (0.051) |
| Temperature | in between |
| Nearest name | Dark Slate Gray (#2F4F4F) |
| Black text | 2.34:1 |
| White text | 8.96:1 |
Values
| HEX | #31503B |
| RGB | rgb(49, 80, 59) |
| HSL | hsl(139, 24%, 25%) |
| OKLCH | oklch(40% 0.051 153.9) |
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 #31503B | 8.96:1 | AAA | Lc -94.9 | Preferred for body text |
| Black text on #31503B | 2.34:1 | Fails | Lc 13.5 | Not readable |
| #31503B text on white | 8.96:1 | AAA | Lc 90.5 | Preferred for body text |
| #31503B text on black | 2.34:1 | Fails | Lc -11.8 | 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 900.
-
Step 50
50
#F3F6F4
oklch(97% 0.004 157.2)
-
Step 100
100
#E4ECE6
oklch(93.5% 0.012 153.7)
-
Step 200
200
#CFDDD3
oklch(88.4% 0.02 154.9)
-
Step 300
300
#AEC8B5
oklch(80.8% 0.039 153.7)
-
Step 400
400
#83AC8F
oklch(70.6% 0.061 153.8)
-
Step 500
500
#639874
oklch(63.2% 0.078 153.9)
-
Step 600
600
#48825C
oklch(55.6% 0.085 153.9)
-
Step 700
700
#396E4C
oklch(49.1% 0.079 154.2)
-
Step 800
800
#305A3E
oklch(42.8% 0.067 153.5)
-
Step 900
900 (this color)
#31503B
oklch(40% 0.051 153.9)
-
Step 950
950
#1A2B1F
oklch(27% 0.032 153.1)
#31503B 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) | #504B3A | 0.046 |
| Deuteranopia (no green cones) | #4B483C | 0.044 |
| Tritanopia (no blue cones) | #2B4F4A | 0.026 |
| Achromatopsia (no color) | #494949 | 0.052 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #31503B
#31503B
oklch(40% 0.051 153.9)
- #593D53
#593D53
oklch(40% 0.052 334.4)
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 #31503B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Slate Gray #2F4F4F ΔE 0.034
- Dark Blue Green #005249 ΔE 0.036
- Pine #2B5D34 ΔE 0.048
- Dark Teal #014D4E ΔE 0.048
- Deep Teal #00555A ΔE 0.053
- Spruce #0A5F38 ΔE 0.056
- Charcoal Grey #3C4142 ΔE 0.056
- Evergreen #05472A ΔE 0.057
Use #31503B 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.