#433F4F
Closest named color: Charcoal Grey (#3C4142). oklch(37.8% 0.027 296.5), rgb(67, 63, 79).
Aa
White text reads best on this color (10.18:1).
About this color
#433F4F is a dark close to neutral grey. In OKLCH its lightness is 38%, its chroma 0.027. It has too little chroma to lean warm or cool. The nearest named color is Charcoal Grey (#3C4142), ΔE 0.029 away. White text reads best on it, at 10.18:1.
| Hue family | Neutrals |
| Lightness | dark (38%) |
| Chroma | close to neutral grey (0.027) |
| Temperature | neutral |
| Nearest name | Charcoal Grey (#3C4142) |
| Black text | 2.06:1 |
| White text | 10.18:1 |
Values
| HEX | #433F4F |
| RGB | rgb(67, 63, 79) |
| HSL | hsl(255, 11%, 28%) |
| OKLCH | oklch(37.8% 0.027 296.5) |
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 #433F4F | 10.18:1 | AAA | Lc -97.7 | Preferred for body text |
| Black text on #433F4F | 2.06:1 | Fails | Lc 10.3 | Not readable |
| #433F4F text on white | 10.18:1 | AAA | Lc 93.7 | Preferred for body text |
| #433F4F text on black | 2.06:1 | Fails | Lc -8.9 | 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
#F5F5F7
oklch(97.1% 0.003 286.4)
-
Step 100
100
#EAE9ED
oklch(93.6% 0.005 297.7)
-
Step 200
200
#DAD8E0
oklch(88.6% 0.011 297.6)
-
Step 300
300
#C1BECD
oklch(80.9% 0.021 295.1)
-
Step 400
400
#A29DB3
oklch(70.7% 0.032 296)
-
Step 500
500
#8B85A0
oklch(63.1% 0.041 295.4)
-
Step 600
600
#766E8B
oklch(55.6% 0.045 297.5)
-
Step 700
700
#635C76
oklch(49.1% 0.042 297.2)
-
Step 800
800
#514B60
oklch(42.7% 0.035 298)
-
Step 900
900 (this color)
#433F4F
oklch(37.8% 0.027 296.5)
-
Step 950
950
#27252E
oklch(27% 0.017 295.4)
#433F4F 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) | #3C4150 | 0.012 |
| Deuteranopia (no green cones) | #3C414F | 0.012 |
| Tritanopia (no blue cones) | #414144 | 0.023 |
| Achromatopsia (no color) | #414141 | 0.028 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #433F4F
#433F4F
oklch(37.8% 0.027 296.5)
- #414433
#414433
oklch(37.9% 0.028 115.9)
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 #433F4F, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Charcoal Grey #3C4142 ΔE 0.029
- Onyx #343A40 ΔE 0.039
- Dark Grey Blue #29465B ΔE 0.041
- Charcoal #264653 ΔE 0.043
- Dark Blue Grey #1F3B4D ΔE 0.056
- Dark Slate Gray #2F4F4F ΔE 0.056
- Gunmetal #293241 ΔE 0.065
- Purple Brown #673A3F ΔE 0.069
Use #433F4F 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.