#31372F
Closest named color: Onyx (#343A40). oklch(32.8% 0.016 137.8), rgb(49, 55, 47).
Aa
White text reads best on this color (12.22:1).
About this color
#31372F is a dark close to neutral grey. In OKLCH its lightness is 33%, its chroma 0.016. It has too little chroma to lean warm or cool. The nearest named color is Onyx (#343A40), ΔE 0.029 away. White text reads best on it, at 12.22:1.
| Hue family | Neutrals |
| Lightness | dark (33%) |
| Chroma | close to neutral grey (0.016) |
| Temperature | neutral |
| Nearest name | Onyx (#343A40) |
| Black text | 1.71:1 |
| White text | 12.22:1 |
Values
| HEX | #31372F |
| RGB | rgb(49, 55, 47) |
| HSL | hsl(105, 8%, 20%) |
| OKLCH | oklch(32.8% 0.016 137.8) |
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 #31372F | 12.22:1 | AAA | Lc -101.4 | Preferred for body text |
| Black text on #31372F | 1.71:1 | Fails | Lc 0.0 | Not readable |
| #31372F text on white | 12.22:1 | AAA | Lc 97.9 | Preferred for body text |
| #31372F text on black | 1.71:1 | Fails | Lc 0.0 | 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
#F5F6F5
oklch(97.2% 0.002 145.6)
-
Step 100
100
#E9EAE8
oklch(93.6% 0.003 128.5)
-
Step 200
200
#D7DAD6
oklch(88.5% 0.006 137.8)
-
Step 300
300
#BDC2BB
oklch(80.8% 0.011 136.6)
-
Step 400
400
#9BA498
oklch(70.8% 0.02 137.8)
-
Step 500
500
#828D7F
oklch(63% 0.024 139)
-
Step 600
600
#6C7768
oklch(55.5% 0.026 137.3)
-
Step 700
700
#5A6457
oklch(49.1% 0.024 138.5)
-
Step 800
800
#4A5247
oklch(42.8% 0.021 137.1)
-
Step 900
900 (this color)
#31372F
oklch(32.8% 0.016 137.8)
-
Step 950
950
#242823
oklch(27.1% 0.011 139.4)
#31372F 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) | #38362F | 0.012 |
| Deuteranopia (no green cones) | #37352F | 0.012 |
| Tritanopia (no blue cones) | #313635 | 0.012 |
| Achromatopsia (no color) | #353535 | 0.016 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #31372F
#31372F
oklch(32.8% 0.016 137.8)
- #38323A
#38323A
oklch(32.7% 0.016 317.7)
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 #31372F, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Onyx #343A40 ΔE 0.029
- Pakistan Green #283618 ΔE 0.041
- Gunmetal #293241 ΔE 0.043
- Charcoal Grey #3C4142 ΔE 0.045
- Dark Blue Grey #1F3B4D ΔE 0.053
- Space Cadet #2B2D42 ΔE 0.057
- Midnight Green #073B4C ΔE 0.060
- Dark Olive #373E02 ΔE 0.065
Use #31372F 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.