#37343C
Closest named color: Onyx (#343A40). oklch(33.1% 0.014 302.6), rgb(55, 52, 60).
Aa
White text reads best on this color (12.21:1).
About this color
#37343C is a dark close to neutral grey. In OKLCH its lightness is 33%, its chroma 0.014. It has too little chroma to lean warm or cool. The nearest named color is Onyx (#343A40), ΔE 0.019 away. White text reads best on it, at 12.21:1.
| Hue family | Neutrals |
| Lightness | dark (33%) |
| Chroma | close to neutral grey (0.014) |
| Temperature | neutral |
| Nearest name | Onyx (#343A40) |
| Black text | 1.71:1 |
| White text | 12.21:1 |
Values
| HEX | #37343C |
| RGB | rgb(55, 52, 60) |
| HSL | hsl(263, 7%, 22%) |
| OKLCH | oklch(33.1% 0.014 302.6) |
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 #37343C | 12.21:1 | AAA | Lc -101.4 | Preferred for body text |
| Black text on #37343C | 1.71:1 | Fails | Lc 0.0 | Not readable |
| #37343C text on white | 12.21:1 | AAA | Lc 97.9 | Preferred for body text |
| #37343C 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
#F5F5F6
oklch(97% 0.001 286.4)
-
Step 100
100
#EAE9EB
oklch(93.5% 0.003 308.4)
-
Step 200
200
#DAD8DC
oklch(88.5% 0.006 308.4)
-
Step 300
300
#C2BFC6
oklch(80.9% 0.01 305.4)
-
Step 400
400
#A29EAA
oklch(70.6% 0.018 301.1)
-
Step 500
500
#8C8695
oklch(63% 0.023 303.8)
-
Step 600
600
#76707F
oklch(55.6% 0.024 303.7)
-
Step 700
700
#635E6C
oklch(49.2% 0.023 301.8)
-
Step 800
800
#514D58
oklch(42.8% 0.019 302.1)
-
Step 900
900 (this color)
#37343C
oklch(33.1% 0.014 302.6)
-
Step 950
950
#27252A
oklch(26.9% 0.01 303.8)
#37343C 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) | #33353C | 0.007 |
| Deuteranopia (no green cones) | #33353C | 0.007 |
| Tritanopia (no blue cones) | #363537 | 0.011 |
| Achromatopsia (no color) | #353535 | 0.015 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
This color is close to neutral, so it has no meaningful hue to rotate. Hue harmonies are omitted.
Palettes with this color
Curated palettes that contain a color within ΔE 0.04 (OKLab) of #37343C, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Onyx #343A40 ΔE 0.019
- Gunmetal #293241 ΔE 0.027
- Space Cadet #2B2D42 ΔE 0.036
- Charcoal Grey #3C4142 ΔE 0.043
- Dark Blue Grey #1F3B4D ΔE 0.043
- Midnight Green #073B4C ΔE 0.057
- Prussian Blue #1D3557 ΔE 0.059
- Charcoal #264653 ΔE 0.061
Use #37343C 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.