#393742
Closest named color: Onyx (#343A40). oklch(34.3% 0.019 293.7), rgb(57, 55, 66).
Aa
White text reads best on this color (11.67:1).
About this color
#393742 is a dark close to neutral grey. In OKLCH its lightness is 34%, its chroma 0.019. It has too little chroma to lean warm or cool. The nearest named color is Onyx (#343A40), ΔE 0.014 away. White text reads best on it, at 11.67:1.
| Hue family | Neutrals |
| Lightness | dark (34%) |
| Chroma | close to neutral grey (0.019) |
| Temperature | neutral |
| Nearest name | Onyx (#343A40) |
| Black text | 1.79:1 |
| White text | 11.67:1 |
Values
| HEX | #393742 |
| RGB | rgb(57, 55, 66) |
| HSL | hsl(251, 9%, 24%) |
| OKLCH | oklch(34.3% 0.019 293.7) |
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 #393742 | 11.67:1 | AAA | Lc -100.5 | Preferred for body text |
| Black text on #393742 | 1.79:1 | Fails | Lc 0.0 | Not readable |
| #393742 text on white | 11.67:1 | AAA | Lc 96.9 | Preferred for body text |
| #393742 text on black | 1.79:1 | 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
#F5F5F7
oklch(97.1% 0.003 286.4)
-
Step 100
100
#EAE9EC
oklch(93.6% 0.004 301.4)
-
Step 200
200
#D9D8DE
oklch(88.5% 0.008 293.9)
-
Step 300
300
#C1BFC9
oklch(80.9% 0.014 295.3)
-
Step 400
400
#A19EAE
oklch(70.7% 0.023 294.4)
-
Step 500
500
#8A869A
oklch(63% 0.03 294.7)
-
Step 600
600
#747085
oklch(55.6% 0.032 294.1)
-
Step 700
700
#615E70
oklch(49.1% 0.029 293)
-
Step 800
800
#4F4D5C
oklch(42.8% 0.025 291.4)
-
Step 900
900 (this color)
#393742
oklch(34.3% 0.019 293.7)
-
Step 950
950
#27252C
oklch(27% 0.013 298.6)
#393742 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) | #353843 | 0.007 |
| Deuteranopia (no green cones) | #353842 | 0.007 |
| Tritanopia (no blue cones) | #37393B | 0.016 |
| Achromatopsia (no color) | #383838 | 0.019 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #393742
#393742
oklch(34.3% 0.019 293.7)
- #383A2F
#383A2F
oklch(34.3% 0.019 115.8)
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 #393742, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Onyx #343A40 ΔE 0.014
- Gunmetal #293241 ΔE 0.033
- Charcoal Grey #3C4142 ΔE 0.034
- Dark Blue Grey #1F3B4D ΔE 0.039
- Space Cadet #2B2D42 ΔE 0.043
- Charcoal #264653 ΔE 0.052
- Prussian Blue #1D3557 ΔE 0.056
- Dark Grey Blue #29465B ΔE 0.056
Use #393742 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.