#343C48
Closest named color: Onyx (#343A40). oklch(35.4% 0.024 258.4), rgb(52, 60, 72).
Aa
White text reads best on this color (11.13:1).
About this color
#343C48 is a dark close to neutral grey. In OKLCH its lightness is 35%, its chroma 0.024. 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 11.13:1.
| Hue family | Neutrals |
| Lightness | dark (35%) |
| Chroma | close to neutral grey (0.024) |
| Temperature | neutral |
| Nearest name | Onyx (#343A40) |
| Black text | 1.88:1 |
| White text | 11.13:1 |
Values
| HEX | #343C48 |
| RGB | rgb(52, 60, 72) |
| HSL | hsl(216, 16%, 24%) |
| OKLCH | oklch(35.4% 0.024 258.4) |
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 #343C48 | 11.13:1 | AAA | Lc -99.5 | Preferred for body text |
| Black text on #343C48 | 1.88:1 | Fails | Lc 8.1 | Not readable |
| #343C48 text on white | 11.13:1 | AAA | Lc 95.8 | Preferred for body text |
| #343C48 text on black | 1.88:1 | 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
#E8EAED
oklch(93.6% 0.005 258.3)
-
Step 200
200
#D5D9E0
oklch(88.4% 0.011 261.8)
-
Step 300
300
#BAC1CC
oklch(80.9% 0.017 259.4)
-
Step 400
400
#96A1B3
oklch(70.6% 0.029 260.3)
-
Step 500
500
#7C8AA0
oklch(63% 0.037 259.4)
-
Step 600
600
#65748B
oklch(55.5% 0.04 258.8)
-
Step 700
700
#546276
oklch(49.2% 0.037 257.3)
-
Step 800
800
#455060
oklch(42.8% 0.03 257.7)
-
Step 900
900 (this color)
#343C48
oklch(35.4% 0.024 258.4)
-
Step 950
950
#22272E
oklch(27.1% 0.015 256.8)
#343C48 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) | #383C49 | 0.007 |
| Deuteranopia (no green cones) | #363B48 | 0.004 |
| Tritanopia (no blue cones) | #2F3E40 | 0.019 |
| Achromatopsia (no color) | #3B3B3B | 0.024 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #343C48
#343C48
oklch(35.4% 0.024 258.4)
- #423A2E
#423A2E
oklch(35.3% 0.023 77.9)
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 #343C48, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Onyx #343A40 ΔE 0.014
- Charcoal Grey #3C4142 ΔE 0.026
- Dark Blue Grey #1F3B4D ΔE 0.030
- Charcoal #264653 ΔE 0.035
- Gunmetal #293241 ΔE 0.039
- Dark Grey Blue #29465B ΔE 0.039
- Midnight Green #073B4C ΔE 0.048
- Prussian Blue #1D3557 ΔE 0.051
Use #343C48 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.