#333642
Closest named color: Onyx (#343A40). oklch(33.5% 0.022 274.2), rgb(51, 54, 66).
Aa
White text reads best on this color (12.01:1).
About this color
#333642 is a dark close to neutral grey. In OKLCH its lightness is 33%, its chroma 0.022. It has too little chroma to lean warm or cool. The nearest named color is Onyx (#343A40), ΔE 0.015 away. White text reads best on it, at 12.01:1.
| Hue family | Neutrals |
| Lightness | dark (33%) |
| Chroma | close to neutral grey (0.022) |
| Temperature | neutral |
| Nearest name | Onyx (#343A40) |
| Black text | 1.74:1 |
| White text | 12.01:1 |
Values
| HEX | #333642 |
| RGB | rgb(51, 54, 66) |
| HSL | hsl(228, 13%, 23%) |
| OKLCH | oklch(33.5% 0.022 274.2) |
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 #333642 | 12.01:1 | AAA | Lc -101.1 | Preferred for body text |
| Black text on #333642 | 1.74:1 | Fails | Lc 0.0 | Not readable |
| #333642 text on white | 12.01:1 | AAA | Lc 97.5 | Preferred for body text |
| #333642 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
#F5F5F7
oklch(97.1% 0.003 286.4)
-
Step 100
100
#E9EAED
oklch(93.7% 0.004 271.4)
-
Step 200
200
#D7D9DF
oklch(88.6% 0.008 271.3)
-
Step 300
300
#BDC0CB
oklch(80.9% 0.016 273.8)
-
Step 400
400
#9BA0B1
oklch(70.7% 0.025 272.7)
-
Step 500
500
#83889E
oklch(63% 0.034 275.3)
-
Step 600
600
#6C7289
oklch(55.5% 0.036 273.7)
-
Step 700
700
#5B6074
oklch(49.2% 0.033 274.1)
-
Step 800
800
#4A4E5E
oklch(42.6% 0.027 274.2)
-
Step 900
900 (this color)
#333642
oklch(33.5% 0.022 274.2)
-
Step 950
950
#24262D
oklch(27% 0.013 272.9)
#333642 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) | #333743 | 0.003 |
| Deuteranopia (no green cones) | #323642 | 0.002 |
| Tritanopia (no blue cones) | #30383A | 0.019 |
| Achromatopsia (no color) | #363636 | 0.022 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #333642
#333642
oklch(33.5% 0.022 274.2)
- #3A372A
#3A372A
oklch(33.6% 0.022 96.6)
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 #333642, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Onyx #343A40 ΔE 0.015
- Gunmetal #293241 ΔE 0.022
- Dark Blue Grey #1F3B4D ΔE 0.032
- Space Cadet #2B2D42 ΔE 0.034
- Charcoal Grey #3C4142 ΔE 0.041
- Midnight Green #073B4C ΔE 0.048
- Prussian Blue #1D3557 ΔE 0.048
- Charcoal #264653 ΔE 0.052
Use #333642 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.