#37313D
Closest named color: Gunmetal (#293241). oklch(32.4% 0.022 307.7), rgb(55, 49, 61).
Aa
White text reads best on this color (12.58:1).
About this color
#37313D is a dark close to neutral grey. In OKLCH its lightness is 32%, its chroma 0.022. 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 12.58:1.
| Hue family | Neutrals |
| Lightness | dark (32%) |
| Chroma | close to neutral grey (0.022) |
| Temperature | neutral |
| Nearest name | Gunmetal (#293241) |
| Black text | 1.66:1 |
| White text | 12.58:1 |
Values
| HEX | #37313D |
| RGB | rgb(55, 49, 61) |
| HSL | hsl(270, 11%, 22%) |
| OKLCH | oklch(32.4% 0.022 307.7) |
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 #37313D | 12.58:1 | AAA | Lc -101.9 | Preferred for body text |
| Black text on #37313D | 1.66:1 | Fails | Lc 0.0 | Not readable |
| #37313D text on white | 12.58:1 | AAA | Lc 98.6 | Preferred for body text |
| #37313D 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
#F6F5F7
oklch(97.1% 0.003 308.4)
-
Step 100
100
#EBE9EC
oklch(93.6% 0.005 314.8)
-
Step 200
200
#DBD7DE
oklch(88.4% 0.01 311.2)
-
Step 300
300
#C3BEC9
oklch(80.9% 0.016 306.4)
-
Step 400
400
#A59CAE
oklch(70.6% 0.028 308)
-
Step 500
500
#8F849A
oklch(63% 0.035 307.8)
-
Step 600
600
#796E85
oklch(55.6% 0.037 306.8)
-
Step 700
700
#665C70
oklch(49.2% 0.034 307.7)
-
Step 800
800
#534B5B
oklch(42.7% 0.028 307.7)
-
Step 900
900 (this color)
#37313D
oklch(32.4% 0.022 307.7)
-
Step 950
950
#28252C
oklch(27.1% 0.013 304.9)
#37313D 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) | #2F333E | 0.014 |
| Deuteranopia (no green cones) | #30333D | 0.013 |
| Tritanopia (no blue cones) | #363235 | 0.016 |
| Achromatopsia (no color) | #333333 | 0.023 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #37313D
#37313D
oklch(32.4% 0.022 307.7)
- #31362A
#31362A
oklch(32.4% 0.022 126)
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 #37313D, 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 0.046
- Charcoal Grey #3C4142 ΔE 0.053
- Prussian Blue #1D3557 ΔE 0.056
- Midnight Green #073B4C ΔE 0.060
- Oxford Blue #1B263B ΔE 0.063
Use #37313D 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.