#3D333F
Closest named color: Onyx (#343A40). oklch(33.7% 0.025 320.6), rgb(61, 51, 63).
Aa
White text reads best on this color (12.04:1).
About this color
#3D333F 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 0.026 away. White text reads best on it, at 12.04:1.
| Hue family | Neutrals |
| Lightness | dark (34%) |
| Chroma | close to neutral grey (0.025) |
| Temperature | neutral |
| Nearest name | Onyx (#343A40) |
| Black text | 1.74:1 |
| White text | 12.04:1 |
Values
| HEX | #3D333F |
| RGB | rgb(61, 51, 63) |
| HSL | hsl(290, 11%, 22%) |
| OKLCH | oklch(33.7% 0.025 320.6) |
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 #3D333F | 12.04:1 | AAA | Lc -101.1 | Preferred for body text |
| Black text on #3D333F | 1.74:1 | Fails | Lc 0.0 | Not readable |
| #3D333F text on white | 12.04:1 | AAA | Lc 97.6 | Preferred for body text |
| #3D333F text on black | 1.74:1 | 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
#F6F5F6
oklch(97.1% 0.002 325.6)
-
Step 100
100
#EBE9EC
oklch(93.6% 0.005 314.8)
-
Step 200
200
#DCD7DD
oklch(88.5% 0.01 320.5)
-
Step 300
300
#C6BDC8
oklch(80.9% 0.018 320.1)
-
Step 400
400
#A99BAC
oklch(70.7% 0.029 320.3)
-
Step 500
500
#948298
oklch(63% 0.039 320.1)
-
Step 600
600
#7F6C82
oklch(55.7% 0.04 321.7)
-
Step 700
700
#6B5A6E
oklch(49.1% 0.038 321.2)
-
Step 800
800
#57495A
oklch(42.6% 0.033 320.3)
-
Step 900
900 (this color)
#3D333F
oklch(33.7% 0.025 320.6)
-
Step 950
950
#2A242B
oklch(27% 0.015 321.4)
#3D333F 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) | #323640 | 0.020 |
| Deuteranopia (no green cones) | #34373F | 0.019 |
| Tritanopia (no blue cones) | #3D3437 | 0.016 |
| Achromatopsia (no color) | #363636 | 0.025 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3D333F
#3D333F
oklch(33.7% 0.025 320.6)
- #303A2E
#303A2E
oklch(33.5% 0.025 140.4)
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 #3D333F, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Onyx #343A40 ΔE 0.026
- Gunmetal #293241 ΔE 0.035
- Space Cadet #2B2D42 ΔE 0.040
- Charcoal Grey #3C4142 ΔE 0.044
- Dark Blue Grey #1F3B4D ΔE 0.050
- Prussian Blue #1D3557 ΔE 0.062
- Charcoal #264653 ΔE 0.065
- Midnight Green #073B4C ΔE 0.066
Use #3D333F 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.