#423D4B
Closest named color: Charcoal Grey (#3C4142). oklch(37.1% 0.025 301.5), rgb(66, 61, 75).
Aa
White text reads best on this color (10.49:1).
About this color
#423D4B is a dark close to neutral grey. In OKLCH its lightness is 37%, its chroma 0.025. It has too little chroma to lean warm or cool. The nearest named color is Charcoal Grey (#3C4142), ΔE 0.026 away. White text reads best on it, at 10.49:1.
| Hue family | Neutrals |
| Lightness | dark (37%) |
| Chroma | close to neutral grey (0.025) |
| Temperature | neutral |
| Nearest name | Charcoal Grey (#3C4142) |
| Black text | 2.00:1 |
| White text | 10.49:1 |
Values
| HEX | #423D4B |
| RGB | rgb(66, 61, 75) |
| HSL | hsl(261, 10%, 27%) |
| OKLCH | oklch(37.1% 0.025 301.5) |
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 #423D4B | 10.49:1 | AAA | Lc -98.3 | Preferred for body text |
| Black text on #423D4B | 2.00:1 | Fails | Lc 9.5 | Not readable |
| #423D4B text on white | 10.49:1 | AAA | Lc 94.4 | Preferred for body text |
| #423D4B text on black | 2.00:1 | Fails | Lc -8.2 | 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
#F6F5F7
oklch(97.1% 0.003 308.4)
-
Step 100
100
#EAE9ED
oklch(93.6% 0.005 297.7)
-
Step 200
200
#DAD8DF
oklch(88.6% 0.01 299.2)
-
Step 300
300
#C2BECB
oklch(80.9% 0.019 300)
-
Step 400
400
#A49DB0
oklch(70.8% 0.028 302.4)
-
Step 500
500
#8D859D
oklch(63.2% 0.037 300.6)
-
Step 600
600
#776E88
oklch(55.6% 0.041 300.9)
-
Step 700
700
#645C73
oklch(49.1% 0.037 300.9)
-
Step 800
800
#524B5E
oklch(42.7% 0.032 301.9)
-
Step 900
900 (this color)
#423D4B
oklch(37.1% 0.025 301.5)
-
Step 950
950
#28252D
oklch(27.1% 0.015 302.4)
#423D4B 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) | #3A3F4C | 0.014 |
| Deuteranopia (no green cones) | #3B3F4B | 0.013 |
| Tritanopia (no blue cones) | #413F42 | 0.019 |
| Achromatopsia (no color) | #3F3F3F | 0.025 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #423D4B
#423D4B
oklch(37.1% 0.025 301.5)
- #3E4234
#3E4234
oklch(37.1% 0.024 120.5)
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 #423D4B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Charcoal Grey #3C4142 ΔE 0.026
- Onyx #343A40 ΔE 0.032
- Charcoal #264653 ΔE 0.045
- Dark Grey Blue #29465B ΔE 0.045
- Dark Blue Grey #1F3B4D ΔE 0.052
- Gunmetal #293241 ΔE 0.059
- Dark Slate Gray #2F4F4F ΔE 0.060
- Space Cadet #2B2D42 ΔE 0.068
Use #423D4B 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.