#31313F
Closest named color: Gunmetal (#293241). oklch(31.9% 0.025 284.9), rgb(49, 49, 63).
Aa
White text reads best on this color (12.79:1).
About this color
#31313F is a dark close to neutral grey. In OKLCH its lightness is 32%, its chroma 0.025. It has too little chroma to lean warm or cool. The nearest named color is Gunmetal (#293241), ΔE 0.013 away. White text reads best on it, at 12.79:1.
| Hue family | Neutrals |
| Lightness | dark (32%) |
| Chroma | close to neutral grey (0.025) |
| Temperature | neutral |
| Nearest name | Gunmetal (#293241) |
| Black text | 1.64:1 |
| White text | 12.79:1 |
Values
| HEX | #31313F |
| RGB | rgb(49, 49, 63) |
| HSL | hsl(240, 13%, 22%) |
| OKLCH | oklch(31.9% 0.025 284.9) |
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 #31313F | 12.79:1 | AAA | Lc -102.2 | Preferred for body text |
| Black text on #31313F | 1.64:1 | Fails | Lc 0.0 | Not readable |
| #31313F text on white | 12.79:1 | AAA | Lc 98.9 | Preferred for body text |
| #31313F text on black | 1.64:1 | 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 950.
-
Step 50
50
#F5F5F8
oklch(97.1% 0.004 286.3)
-
Step 100
100
#E9E9EF
oklch(93.6% 0.008 286.2)
-
Step 200
200
#D8D8E4
oklch(88.6% 0.016 286.1)
-
Step 300
300
#BEBED3
oklch(80.8% 0.029 285.7)
-
Step 400
400
#9D9DBD
oklch(70.7% 0.046 285.2)
-
Step 500
500
#8585AD
oklch(63.1% 0.06 284.6)
-
Step 600
600
#6F6E98
oklch(55.6% 0.065 285.2)
-
Step 700
700
#5D5C82
oklch(49.1% 0.06 285.2)
-
Step 800
800
#4C4B6A
oklch(42.7% 0.051 285.5)
-
Step 900
900
#3F3F56
oklch(37.7% 0.039 284.4)
-
Step 950
950 (this color)
#31313F
oklch(31.9% 0.025 284.9)
#31313F 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) | #2E3340 | 0.008 |
| Deuteranopia (no green cones) | #2D323F | 0.007 |
| Tritanopia (no blue cones) | #2E3336 | 0.021 |
| Achromatopsia (no color) | #323232 | 0.025 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #31313F
#31313F
oklch(31.9% 0.025 284.9)
- #343325
#343325
oklch(31.8% 0.024 104.3)
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 #31313F, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Gunmetal #293241 ΔE 0.013
- Space Cadet #2B2D42 ΔE 0.020
- Onyx #343A40 ΔE 0.031
- Dark Blue Grey #1F3B4D ΔE 0.040
- Prussian Blue #1D3557 ΔE 0.048
- Midnight Green #073B4C ΔE 0.052
- Oxford Blue #1B263B ΔE 0.054
- Charcoal Grey #3C4142 ΔE 0.057
Use #31313F 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.