#343B47
Closest named color: Onyx (#343A40). oklch(35.1% 0.023 261.2), rgb(52, 59, 71).
Aa
White text reads best on this color (11.27:1).
About this color
#343B47 is a dark close to neutral grey. In OKLCH its lightness is 35%, its chroma 0.023. It has too little chroma to lean warm or cool. The nearest named color is Onyx (#343A40), ΔE 0.012 away. White text reads best on it, at 11.27:1.
| Hue family | Neutrals |
| Lightness | dark (35%) |
| Chroma | close to neutral grey (0.023) |
| Temperature | neutral |
| Nearest name | Onyx (#343A40) |
| Black text | 1.86:1 |
| White text | 11.27:1 |
Values
| HEX | #343B47 |
| RGB | rgb(52, 59, 71) |
| HSL | hsl(218, 15%, 24%) |
| OKLCH | oklch(35.1% 0.023 261.2) |
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 #343B47 | 11.27:1 | AAA | Lc -99.8 | Preferred for body text |
| Black text on #343B47 | 1.86:1 | Fails | Lc 7.8 | Not readable |
| #343B47 text on white | 11.27:1 | AAA | Lc 96.0 | Preferred for body text |
| #343B47 text on black | 1.86:1 | 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
#D6D9E0
oklch(88.5% 0.01 267.4)
-
Step 300
300
#BAC1CC
oklch(80.9% 0.017 259.4)
-
Step 400
400
#97A1B2
oklch(70.7% 0.027 261.1)
-
Step 500
500
#7E8A9F
oklch(63.1% 0.035 261.7)
-
Step 600
600
#67748A
oklch(55.6% 0.038 260.9)
-
Step 700
700
#556175
oklch(49% 0.035 260.6)
-
Step 800
800
#464F60
oklch(42.6% 0.031 263.1)
-
Step 900
900 (this color)
#343B47
oklch(35.1% 0.023 261.2)
-
Step 950
950
#22272E
oklch(27.1% 0.015 256.8)
#343B47 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) | #373C48 | 0.006 |
| Deuteranopia (no green cones) | #353A47 | 0.004 |
| Tritanopia (no blue cones) | #2F3D3F | 0.019 |
| Achromatopsia (no color) | #3B3B3B | 0.023 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #343B47
#343B47
oklch(35.1% 0.023 261.2)
- #413A2D
#413A2D
oklch(35.2% 0.024 82.9)
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 #343B47, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Onyx #343A40 ΔE 0.012
- Charcoal Grey #3C4142 ΔE 0.028
- Dark Blue Grey #1F3B4D ΔE 0.029
- Gunmetal #293241 ΔE 0.036
- Charcoal #264653 ΔE 0.037
- Dark Grey Blue #29465B ΔE 0.042
- Midnight Green #073B4C ΔE 0.047
- Space Cadet #2B2D42 ΔE 0.049
Use #343B47 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.