#40323B
Closest named color: Onyx (#343A40). oklch(33.6% 0.025 339.8), rgb(64, 50, 59).
Aa
White text reads best on this color (12.08:1).
About this color
#40323B is a dark close to neutral grey. In OKLCH its lightness is 34%, its chroma 0.025. It has too little chroma to lean warm or cool. The nearest named color is Onyx (#343A40), ΔE 0.030 away. White text reads best on it, at 12.08:1.
| Hue family | Neutrals |
| Lightness | dark (34%) |
| Chroma | close to neutral grey (0.025) |
| Temperature | neutral |
| Nearest name | Onyx (#343A40) |
| Black text | 1.73:1 |
| White text | 12.08:1 |
Values
| HEX | #40323B |
| RGB | rgb(64, 50, 59) |
| HSL | hsl(321, 12%, 22%) |
| OKLCH | oklch(33.6% 0.025 339.8) |
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 #40323B | 12.08:1 | AAA | Lc -101.2 | Preferred for body text |
| Black text on #40323B | 1.73:1 | Fails | Lc 0.0 | Not readable |
| #40323B text on white | 12.08:1 | AAA | Lc 97.6 | Preferred for body text |
| #40323B text on black | 1.73:1 | 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
#F7F5F6
oklch(97.2% 0.002 345.2)
-
Step 100
100
#ECE8EB
oklch(93.5% 0.006 334)
-
Step 200
200
#DED6DB
oklch(88.4% 0.011 339.4)
-
Step 300
300
#C9BCC4
oklch(80.8% 0.018 340)
-
Step 400
400
#AE9AA7
oklch(70.8% 0.03 338.8)
-
Step 500
500
#9A8191
oklch(63.1% 0.038 339.7)
-
Step 600
600
#856A7B
oklch(55.6% 0.042 340.4)
-
Step 700
700
#705868
oklch(49% 0.039 338.8)
-
Step 800
800
#5B4855
oklch(42.6% 0.033 337.9)
-
Step 900
900 (this color)
#40323B
oklch(33.6% 0.025 339.8)
-
Step 950
950
#2C2429
oklch(27.1% 0.015 340.2)
#40323B 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) | #32353B | 0.026 |
| Deuteranopia (no green cones) | #36373B | 0.023 |
| Tritanopia (no blue cones) | #423235 | 0.011 |
| Achromatopsia (no color) | #363636 | 0.025 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #40323B
#40323B
oklch(33.6% 0.025 339.8)
- #2C3B32
#2C3B32
oklch(33.6% 0.025 158.4)
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 #40323B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Onyx #343A40 ΔE 0.030
- Gunmetal #293241 ΔE 0.041
- Space Cadet #2B2D42 ΔE 0.046
- Charcoal Grey #3C4142 ΔE 0.046
- Dark Blue Grey #1F3B4D ΔE 0.057
- Prussian Blue #1D3557 ΔE 0.070
- Charcoal #264653 ΔE 0.070
- Midnight Green #073B4C ΔE 0.073
Use #40323B 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.