#42363B
Closest named color: Onyx (#343A40). oklch(34.8% 0.019 351.1), rgb(66, 54, 59).
Aa
White text reads best on this color (11.52:1).
About this color
#42363B is a dark close to neutral grey. In OKLCH its lightness is 35%, its chroma 0.019. It has too little chroma to lean warm or cool. The nearest named color is Onyx (#343A40), ΔE 0.026 away. White text reads best on it, at 11.52:1.
| Hue family | Neutrals |
| Lightness | dark (35%) |
| Chroma | close to neutral grey (0.019) |
| Temperature | neutral |
| Nearest name | Onyx (#343A40) |
| Black text | 1.82:1 |
| White text | 11.52:1 |
Values
| HEX | #42363B |
| RGB | rgb(66, 54, 59) |
| HSL | hsl(335, 10%, 24%) |
| OKLCH | oklch(34.8% 0.019 351.1) |
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 #42363B | 11.52:1 | AAA | Lc -100.2 | Preferred for body text |
| Black text on #42363B | 1.82:1 | Fails | Lc 7.3 | Not readable |
| #42363B text on white | 11.52:1 | AAA | Lc 96.5 | Preferred for body text |
| #42363B text on black | 1.82:1 | 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
#F6F5F5
oklch(97.1% 0.001 17.2)
-
Step 100
100
#ECE9EA
oklch(93.7% 0.003 354.7)
-
Step 200
200
#DDD7DA
oklch(88.5% 0.008 345.4)
-
Step 300
300
#C8BDC2
oklch(80.9% 0.014 348)
-
Step 400
400
#AC9BA2
oklch(70.6% 0.022 350.8)
-
Step 500
500
#98838B
oklch(63.2% 0.028 353)
-
Step 600
600
#836C75
oklch(55.6% 0.032 352.7)
-
Step 700
700
#6E5A63
oklch(49% 0.029 349.4)
-
Step 800
800
#5A4A50
oklch(42.8% 0.023 353.6)
-
Step 900
900 (this color)
#42363B
oklch(34.8% 0.019 351.1)
-
Step 950
950
#2B2427
oklch(26.9% 0.012 350.2)
#42363B 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) | #37383B | 0.020 |
| Deuteranopia (no green cones) | #3A3A3B | 0.018 |
| Tritanopia (no blue cones) | #443638 | 0.006 |
| Achromatopsia (no color) | #393939 | 0.019 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #42363B
#42363B
oklch(34.8% 0.019 351.1)
- #303D39
#303D39
oklch(34.7% 0.018 174.5)
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 #42363B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Onyx #343A40 ΔE 0.026
- Charcoal Grey #3C4142 ΔE 0.034
- Gunmetal #293241 ΔE 0.048
- Space Cadet #2B2D42 ΔE 0.056
- Dark Blue Grey #1F3B4D ΔE 0.057
- Charcoal #264653 ΔE 0.063
- Dark Grey Blue #29465B ΔE 0.068
- Midnight Green #073B4C ΔE 0.074
Use #42363B 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.