#333646
Closest named color: Onyx (#343A40). oklch(33.7% 0.028 276.5), rgb(51, 54, 70).
Aa
White text reads best on this color (11.95:1).
About this color
#333646 is a dark close to neutral grey. In OKLCH its lightness is 34%, its chroma 0.028. It has too little chroma to lean warm or cool. The nearest named color is Onyx (#343A40), ΔE 0.020 away. White text reads best on it, at 11.95:1.
| Hue family | Neutrals |
| Lightness | dark (34%) |
| Chroma | close to neutral grey (0.028) |
| Temperature | neutral |
| Nearest name | Onyx (#343A40) |
| Black text | 1.75:1 |
| White text | 11.95:1 |
Values
| HEX | #333646 |
| RGB | rgb(51, 54, 70) |
| HSL | hsl(231, 16%, 24%) |
| OKLCH | oklch(33.7% 0.028 276.5) |
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 #333646 | 11.95:1 | AAA | Lc -100.9 | Preferred for body text |
| Black text on #333646 | 1.75:1 | Fails | Lc 0.0 | Not readable |
| #333646 text on white | 11.95:1 | AAA | Lc 97.4 | Preferred for body text |
| #333646 text on black | 1.75:1 | 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
#E8E9EE
oklch(93.5% 0.007 277.2)
-
Step 200
200
#D7D9E1
oklch(88.6% 0.011 274.9)
-
Step 300
300
#BDC0CF
oklch(81% 0.021 276.9)
-
Step 400
400
#9B9FB6
oklch(70.7% 0.034 277.7)
-
Step 500
500
#8288A4
oklch(63.2% 0.043 275.6)
-
Step 600
600
#6C718F
oklch(55.6% 0.047 277.4)
-
Step 700
700
#5A5F7A
oklch(49.2% 0.044 276.5)
-
Step 800
800
#494D63
oklch(42.5% 0.037 276.7)
-
Step 900
900 (this color)
#333646
oklch(33.7% 0.028 276.5)
-
Step 950
950
#24262F
oklch(27% 0.017 275.4)
#333646 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) | #323847 | 0.006 |
| Deuteranopia (no green cones) | #303646 | 0.005 |
| Tritanopia (no blue cones) | #2E393B | 0.026 |
| Achromatopsia (no color) | #373737 | 0.028 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #333646
#333646
oklch(33.7% 0.028 276.5)
- #3B3726
#3B3726
oklch(33.6% 0.029 96.5)
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 #333646, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Onyx #343A40 ΔE 0.020
- Gunmetal #293241 ΔE 0.023
- Dark Blue Grey #1F3B4D ΔE 0.030
- Space Cadet #2B2D42 ΔE 0.033
- Prussian Blue #1D3557 ΔE 0.043
- Charcoal Grey #3C4142 ΔE 0.043
- Midnight Green #073B4C ΔE 0.047
- Charcoal #264653 ΔE 0.051
Use #333646 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.