#373741
Closest named color: Onyx (#343A40). oklch(34.1% 0.017 285.4), rgb(55, 55, 65).
Aa
White text reads best on this color (11.76:1).
About this color
#373741 is a dark close to neutral grey. In OKLCH its lightness is 34%, its chroma 0.017. It has too little chroma to lean warm or cool. The nearest named color is Onyx (#343A40), ΔE 0.011 away. White text reads best on it, at 11.76:1.
| Hue family | Neutrals |
| Lightness | dark (34%) |
| Chroma | close to neutral grey (0.017) |
| Temperature | neutral |
| Nearest name | Onyx (#343A40) |
| Black text | 1.78:1 |
| White text | 11.76:1 |
Values
| HEX | #373741 |
| RGB | rgb(55, 55, 65) |
| HSL | hsl(240, 8%, 24%) |
| OKLCH | oklch(34.1% 0.017 285.4) |
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 #373741 | 11.76:1 | AAA | Lc -100.6 | Preferred for body text |
| Black text on #373741 | 1.78:1 | Fails | Lc 0.0 | Not readable |
| #373741 text on white | 11.76:1 | AAA | Lc 97.0 | Preferred for body text |
| #373741 text on black | 1.78:1 | 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
#D8D8DE
oklch(88.4% 0.008 286.2)
-
Step 300
300
#BFC0C9
oklch(81% 0.013 281)
-
Step 400
400
#9F9FAD
oklch(70.7% 0.02 285.9)
-
Step 500
500
#878799
oklch(62.9% 0.027 285.6)
-
Step 600
600
#717184
oklch(55.5% 0.029 285.4)
-
Step 700
700
#5F5F70
oklch(49.2% 0.027 285.4)
-
Step 800
800
#4D4D5B
oklch(42.6% 0.023 285.4)
-
Step 900
900 (this color)
#373741
oklch(34.1% 0.017 285.4)
-
Step 950
950
#26262C
oklch(27.1% 0.011 285.6)
#373741 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) | #353841 | 0.004 |
| Deuteranopia (no green cones) | #343841 | 0.006 |
| Tritanopia (no blue cones) | #35393A | 0.016 |
| Achromatopsia (no color) | #383838 | 0.017 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #373741
#373741
oklch(34.1% 0.017 285.4)
- #39392E
#39392E
oklch(34.1% 0.019 107.3)
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 #373741, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Onyx #343A40 ΔE 0.011
- Gunmetal #293241 ΔE 0.030
- Charcoal Grey #3C4142 ΔE 0.035
- Dark Blue Grey #1F3B4D ΔE 0.037
- Space Cadet #2B2D42 ΔE 0.041
- Charcoal #264653 ΔE 0.051
- Midnight Green #073B4C ΔE 0.053
- Prussian Blue #1D3557 ΔE 0.055
Use #373741 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.