#343D48
Closest named color: Onyx (#343A40). oklch(35.6% 0.023 253.6), rgb(52, 61, 72).
Aa
White text reads best on this color (11.01:1).
About this color
#343D48 is a dark close to neutral grey. In OKLCH its lightness is 36%, its chroma 0.023. 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 11.01:1.
| Hue family | Neutrals |
| Lightness | dark (36%) |
| Chroma | close to neutral grey (0.023) |
| Temperature | neutral |
| Nearest name | Onyx (#343A40) |
| Black text | 1.90:1 |
| White text | 11.01:1 |
Values
| HEX | #343D48 |
| RGB | rgb(52, 61, 72) |
| HSL | hsl(213, 16%, 24%) |
| OKLCH | oklch(35.6% 0.023 253.6) |
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 #343D48 | 11.01:1 | AAA | Lc -99.3 | Preferred for body text |
| Black text on #343D48 | 1.90:1 | Fails | Lc 8.4 | Not readable |
| #343D48 text on white | 11.01:1 | AAA | Lc 95.5 | Preferred for body text |
| #343D48 text on black | 1.90:1 | 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
#D5DADF
oklch(88.6% 0.009 247.9)
-
Step 300
300
#B9C1CC
oklch(80.8% 0.018 256.3)
-
Step 400
400
#95A2B2
oklch(70.7% 0.028 253.6)
-
Step 500
500
#7B8B9F
oklch(63.1% 0.035 254.1)
-
Step 600
600
#647589
oklch(55.6% 0.037 252.7)
-
Step 700
700
#536275
oklch(49.1% 0.036 254.5)
-
Step 800
800
#44505F
oklch(42.7% 0.029 254.1)
-
Step 900
900 (this color)
#343D48
oklch(35.6% 0.023 253.6)
-
Step 950
950
#22272D
oklch(27% 0.013 253)
#343D48 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) | #393D49 | 0.008 |
| Deuteranopia (no green cones) | #373B48 | 0.008 |
| Tritanopia (no blue cones) | #2F3F41 | 0.018 |
| Achromatopsia (no color) | #3C3C3C | 0.023 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #343D48
#343D48
oklch(35.6% 0.023 253.6)
- #433B2F
#433B2F
oklch(35.7% 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 #343D48, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Onyx #343A40 ΔE 0.015
- Charcoal Grey #3C4142 ΔE 0.023
- Dark Blue Grey #1F3B4D ΔE 0.031
- Charcoal #264653 ΔE 0.032
- Dark Grey Blue #29465B ΔE 0.038
- Gunmetal #293241 ΔE 0.042
- Midnight Green #073B4C ΔE 0.048
- Prussian Blue #1D3557 ΔE 0.054
Use #343D48 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.