#373841
Closest named color: Onyx (#343A40). oklch(34.3% 0.016 280.5), rgb(55, 56, 65).
Aa
White text reads best on this color (11.63:1).
About this color
#373841 is a dark close to neutral grey. In OKLCH its lightness is 34%, its chroma 0.016. It has too little chroma to lean warm or cool. The nearest named color is Onyx (#343A40), ΔE 0.009 away. White text reads best on it, at 11.63:1.
| Hue family | Neutrals |
| Lightness | dark (34%) |
| Chroma | close to neutral grey (0.016) |
| Temperature | neutral |
| Nearest name | Onyx (#343A40) |
| Black text | 1.80:1 |
| White text | 11.63:1 |
Values
| HEX | #373841 |
| RGB | rgb(55, 56, 65) |
| HSL | hsl(234, 8%, 24%) |
| OKLCH | oklch(34.3% 0.016 280.5) |
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 #373841 | 11.63:1 | AAA | Lc -100.4 | Preferred for body text |
| Black text on #373841 | 1.80:1 | Fails | Lc 0.0 | Not readable |
| #373841 text on white | 11.63:1 | AAA | Lc 96.8 | Preferred for body text |
| #373841 text on black | 1.80:1 | 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
#E9E9EC
oklch(93.5% 0.004 286.3)
-
Step 200
200
#D8D9DD
oklch(88.6% 0.006 275)
-
Step 300
300
#BFC0C8
oklch(80.9% 0.011 280.4)
-
Step 400
400
#9E9FAC
oklch(70.6% 0.019 282.4)
-
Step 500
500
#868898
oklch(63% 0.024 280)
-
Step 600
600
#707283
oklch(55.6% 0.026 280.2)
-
Step 700
700
#5E5F6F
oklch(49% 0.025 282.6)
-
Step 800
800
#4D4E5A
oklch(42.7% 0.02 281.7)
-
Step 900
900 (this color)
#373841
oklch(34.3% 0.016 280.5)
-
Step 950
950
#25262B
oklch(27% 0.009 276.8)
#373841 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) | #363941 | 0.004 |
| Deuteranopia (no green cones) | #353841 | 0.003 |
| Tritanopia (no blue cones) | #353A3B | 0.015 |
| Achromatopsia (no color) | #383838 | 0.016 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #373841
#373841
oklch(34.3% 0.016 280.5)
- #3A3930
#3A3930
oklch(34.3% 0.015 102)
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 #373841, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Onyx #343A40 ΔE 0.009
- Charcoal Grey #3C4142 ΔE 0.031
- Gunmetal #293241 ΔE 0.032
- Dark Blue Grey #1F3B4D ΔE 0.037
- Space Cadet #2B2D42 ΔE 0.044
- Charcoal #264653 ΔE 0.049
- Midnight Green #073B4C ΔE 0.053
- Dark Grey Blue #29465B ΔE 0.054
Use #373841 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.