#37313C
Closest named color: Gunmetal (#293241). oklch(32.4% 0.021 309.7), rgb(55, 49, 60).
Aa
White text reads best on this color (12.59:1).
About this color
#37313C is a dark close to neutral grey. In OKLCH its lightness is 32%, its chroma 0.021. It has too little chroma to lean warm or cool. The nearest named color is Gunmetal (#293241), ΔE 0.024 away. White text reads best on it, at 12.59:1.
| Hue family | Neutrals |
| Lightness | dark (32%) |
| Chroma | close to neutral grey (0.021) |
| Temperature | neutral |
| Nearest name | Gunmetal (#293241) |
| Black text | 1.66:1 |
| White text | 12.59:1 |
Values
| HEX | #37313C |
| RGB | rgb(55, 49, 60) |
| HSL | hsl(273, 10%, 21%) |
| OKLCH | oklch(32.4% 0.021 309.7) |
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 #37313C | 12.59:1 | AAA | Lc -102.0 | Preferred for body text |
| Black text on #37313C | 1.66:1 | Fails | Lc 0.0 | Not readable |
| #37313C text on white | 12.59:1 | AAA | Lc 98.6 | Preferred for body text |
| #37313C text on black | 1.66:1 | 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
#F6F5F6
oklch(97.1% 0.002 325.6)
-
Step 100
100
#EBE9EC
oklch(93.6% 0.005 314.8)
-
Step 200
200
#DBD8DD
oklch(88.6% 0.007 312.3)
-
Step 300
300
#C4BEC8
oklch(80.9% 0.015 312.2)
-
Step 400
400
#A59DAD
oklch(70.8% 0.025 308.1)
-
Step 500
500
#8F8498
oklch(63% 0.032 310)
-
Step 600
600
#796E83
oklch(55.6% 0.035 308.8)
-
Step 700
700
#665C6F
oklch(49.1% 0.032 308.8)
-
Step 800
800
#534B5A
oklch(42.6% 0.026 309.2)
-
Step 900
900 (this color)
#37313C
oklch(32.4% 0.021 309.7)
-
Step 950
950
#28252B
oklch(27% 0.012 308)
#37313C 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) | #2F333C | 0.015 |
| Deuteranopia (no green cones) | #31333C | 0.012 |
| Tritanopia (no blue cones) | #363235 | 0.014 |
| Achromatopsia (no color) | #333333 | 0.021 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #37313C
#37313C
oklch(32.4% 0.021 309.7)
- #30362B
#30362B
oklch(32.3% 0.021 130.9)
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 #37313C, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Gunmetal #293241 ΔE 0.024
- Onyx #343A40 ΔE 0.028
- Space Cadet #2B2D42 ΔE 0.029
- Dark Blue Grey #1F3B4D ΔE 0.047
- Charcoal Grey #3C4142 ΔE 0.052
- Prussian Blue #1D3557 ΔE 0.058
- Midnight Green #073B4C ΔE 0.060
- Oxford Blue #1B263B ΔE 0.063
Use #37313C 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.