#423A43
Closest named color: Charcoal Grey (#3C4142). oklch(36% 0.019 322.5), rgb(66, 58, 67).
Aa
White text reads best on this color (10.94:1).
About this color
#423A43 is a dark close to neutral grey. In OKLCH its lightness is 36%, its chroma 0.019. It has too little chroma to lean warm or cool. The nearest named color is Charcoal Grey (#3C4142), ΔE 0.025 away. White text reads best on it, at 10.94:1.
| Hue family | Neutrals |
| Lightness | dark (36%) |
| Chroma | close to neutral grey (0.019) |
| Temperature | neutral |
| Nearest name | Charcoal Grey (#3C4142) |
| Black text | 1.91:1 |
| White text | 10.94:1 |
Values
| HEX | #423A43 |
| RGB | rgb(66, 58, 67) |
| HSL | hsl(293, 7%, 25%) |
| OKLCH | oklch(36% 0.019 322.5) |
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 #423A43 | 10.94:1 | AAA | Lc -99.2 | Preferred for body text |
| Black text on #423A43 | 1.91:1 | Fails | Lc 8.5 | Not readable |
| #423A43 text on white | 10.94:1 | AAA | Lc 95.4 | Preferred for body text |
| #423A43 text on black | 1.91:1 | 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
#F6F5F6
oklch(97.1% 0.002 325.6)
-
Step 100
100
#EBE9EB
oklch(93.6% 0.003 325.6)
-
Step 200
200
#DCD7DC
oklch(88.5% 0.009 325.6)
-
Step 300
300
#C5BEC6
oklch(81% 0.013 321.9)
-
Step 400
400
#A89CA9
oklch(70.7% 0.023 323.5)
-
Step 500
500
#928494
oklch(63.1% 0.029 322)
-
Step 600
600
#7C6E7E
oklch(55.7% 0.03 322)
-
Step 700
700
#695B6B
oklch(49% 0.031 322)
-
Step 800
800
#554B57
oklch(42.7% 0.023 320.6)
-
Step 900
900 (this color)
#423A43
oklch(36% 0.019 322.5)
-
Step 950
950
#29252A
oklch(27.1% 0.011 319.5)
#423A43 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) | #393C43 | 0.016 |
| Deuteranopia (no green cones) | #3B3D43 | 0.015 |
| Tritanopia (no blue cones) | #423B3D | 0.012 |
| Achromatopsia (no color) | #3C3C3C | 0.019 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #423A43
#423A43
oklch(36% 0.019 322.5)
- #384037
#384037
oklch(36.1% 0.019 142.1)
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 #423A43, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Charcoal Grey #3C4142 ΔE 0.025
- Onyx #343A40 ΔE 0.025
- Charcoal #264653 ΔE 0.052
- Gunmetal #293241 ΔE 0.052
- Dark Blue Grey #1F3B4D ΔE 0.053
- Dark Grey Blue #29465B ΔE 0.055
- Space Cadet #2B2D42 ΔE 0.062
- Dark Slate Gray #2F4F4F ΔE 0.067
Use #423A43 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.