#31313A
Closest named color: Gunmetal (#293241). oklch(31.7% 0.016 285.5), rgb(49, 49, 58).
Aa
White text reads best on this color (12.87:1).
About this color
#31313A is a dark close to neutral grey. In OKLCH its lightness is 32%, its chroma 0.016. It has too little chroma to lean warm or cool. The nearest named color is Gunmetal (#293241), ΔE 0.017 away. White text reads best on it, at 12.87:1.
| Hue family | Neutrals |
| Lightness | dark (32%) |
| Chroma | close to neutral grey (0.016) |
| Temperature | neutral |
| Nearest name | Gunmetal (#293241) |
| Black text | 1.63:1 |
| White text | 12.87:1 |
Values
| HEX | #31313A |
| RGB | rgb(49, 49, 58) |
| HSL | hsl(240, 8%, 21%) |
| OKLCH | oklch(31.7% 0.016 285.5) |
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 #31313A | 12.87:1 | AAA | Lc -102.3 | Preferred for body text |
| Black text on #31313A | 1.63:1 | Fails | Lc 0.0 | Not readable |
| #31313A text on white | 12.87:1 | AAA | Lc 99.1 | Preferred for body text |
| #31313A text on black | 1.63:1 | 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
#F5F5F7
oklch(97.1% 0.003 286.4)
-
Step 100
100
#E9E9ED
oklch(93.5% 0.005 286.3)
-
Step 200
200
#D8D8E0
oklch(88.5% 0.011 286.2)
-
Step 300
300
#BFBFCD
oklch(80.9% 0.02 286)
-
Step 400
400
#9E9EB3
oklch(70.6% 0.03 285.6)
-
Step 500
500
#8787A0
oklch(63.2% 0.037 285.3)
-
Step 600
600
#70708B
oklch(55.5% 0.042 285)
-
Step 700
700
#5E5E76
oklch(49.1% 0.038 284.9)
-
Step 800
800
#4D4D60
oklch(42.8% 0.031 285)
-
Step 900
900
#40404F
oklch(37.7% 0.025 285.1)
-
Step 950
950 (this color)
#31313A
oklch(31.7% 0.016 285.5)
#31313A 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) | #2F323A | 0.005 |
| Deuteranopia (no green cones) | #2F313A | 0.003 |
| Tritanopia (no blue cones) | #2F3234 | 0.013 |
| Achromatopsia (no color) | #323232 | 0.016 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #31313A
#31313A
oklch(31.7% 0.016 285.5)
- #333329
#333329
oklch(31.8% 0.017 107.3)
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 #31313A, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Gunmetal #293241 ΔE 0.017
- Space Cadet #2B2D42 ΔE 0.025
- Onyx #343A40 ΔE 0.030
- Dark Blue Grey #1F3B4D ΔE 0.043
- Midnight Green #073B4C ΔE 0.054
- Prussian Blue #1D3557 ΔE 0.055
- Oxford Blue #1B263B ΔE 0.055
- Jet #212529 ΔE 0.056
Use #31313A 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.