#333A48
Closest named color: Onyx (#343A40). oklch(34.8% 0.026 264.1), rgb(51, 58, 72).
Aa
White text reads best on this color (11.41:1).
About this color
#333A48 is a dark close to neutral grey. In OKLCH its lightness is 35%, its chroma 0.026. 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 11.41:1.
| Hue family | Neutrals |
| Lightness | dark (35%) |
| Chroma | close to neutral grey (0.026) |
| Temperature | neutral |
| Nearest name | Onyx (#343A40) |
| Black text | 1.83:1 |
| White text | 11.41:1 |
Values
| HEX | #333A48 |
| RGB | rgb(51, 58, 72) |
| HSL | hsl(220, 17%, 24%) |
| OKLCH | oklch(34.8% 0.026 264.1) |
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 #333A48 | 11.41:1 | AAA | Lc -100.0 | Preferred for body text |
| Black text on #333A48 | 1.83:1 | Fails | Lc 7.6 | Not readable |
| #333A48 text on white | 11.41:1 | AAA | Lc 96.3 | Preferred for body text |
| #333A48 text on black | 1.83:1 | 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
#F4F5F7
oklch(97% 0.003 264.5)
-
Step 100
100
#E8EAEE
oklch(93.7% 0.006 264.5)
-
Step 200
200
#D5D9E1
oklch(88.5% 0.012 264.5)
-
Step 300
300
#BAC1CE
oklch(80.9% 0.02 263)
-
Step 400
400
#97A1B5
oklch(70.8% 0.031 264.4)
-
Step 500
500
#7D8AA3
oklch(63.2% 0.041 263.5)
-
Step 600
600
#66738E
oklch(55.5% 0.045 264.8)
-
Step 700
700
#556178
oklch(49.1% 0.04 263.3)
-
Step 800
800
#464F62
oklch(42.7% 0.034 265.1)
-
Step 900
900 (this color)
#333A48
oklch(34.8% 0.026 264.1)
-
Step 950
950
#22262F
oklch(26.9% 0.018 266.3)
#333A48 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) | #363B49 | 0.006 |
| Deuteranopia (no green cones) | #343948 | 0.003 |
| Tritanopia (no blue cones) | #2D3D3F | 0.024 |
| Achromatopsia (no color) | #3A3A3A | 0.026 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #333A48
#333A48
oklch(34.8% 0.026 264.1)
- #40392A
#40392A
oklch(34.7% 0.027 85.8)
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 #333A48, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Onyx #343A40 ΔE 0.014
- Dark Blue Grey #1F3B4D ΔE 0.027
- Charcoal Grey #3C4142 ΔE 0.033
- Gunmetal #293241 ΔE 0.033
- Charcoal #264653 ΔE 0.039
- Dark Grey Blue #29465B ΔE 0.043
- Space Cadet #2B2D42 ΔE 0.045
- Midnight Green #073B4C ΔE 0.045
Use #333A48 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.