#423C33
Closest named color: Charcoal Grey (#3C4142). oklch(35.9% 0.017 78.1), rgb(66, 60, 51).
Aa
White text reads best on this color (10.90:1).
About this color
#423C33 is a dark close to neutral grey. In OKLCH its lightness is 36%, its chroma 0.017. 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 10.90:1.
| Hue family | Neutrals |
| Lightness | dark (36%) |
| Chroma | close to neutral grey (0.017) |
| Temperature | neutral |
| Nearest name | Charcoal Grey (#3C4142) |
| Black text | 1.92:1 |
| White text | 10.90:1 |
Values
| HEX | #423C33 |
| RGB | rgb(66, 60, 51) |
| HSL | hsl(36, 13%, 23%) |
| OKLCH | oklch(35.9% 0.017 78.1) |
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 #423C33 | 10.90:1 | AAA | Lc -99.1 | Preferred for body text |
| Black text on #423C33 | 1.92:1 | Fails | Lc 8.6 | Not readable |
| #423C33 text on white | 10.90:1 | AAA | Lc 95.3 | Preferred for body text |
| #423C33 text on black | 1.92:1 | Fails | Lc -7.4 | 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
#F6F5F4
oklch(97.1% 0.002 67.8)
-
Step 100
100
#EBE9E7
oklch(93.5% 0.003 67.8)
-
Step 200
200
#DCD9D4
oklch(88.6% 0.008 80.7)
-
Step 300
300
#C5C0B8
oklch(81% 0.012 79.8)
-
Step 400
400
#A89F93
oklch(70.7% 0.02 75.3)
-
Step 500
500
#928878
oklch(63.1% 0.026 79.7)
-
Step 600
600
#7D7261
oklch(55.7% 0.029 78.8)
-
Step 700
700
#695F50
oklch(49.1% 0.026 78)
-
Step 800
800
#564E42
oklch(42.8% 0.022 78)
-
Step 900
900 (this color)
#423C33
oklch(35.9% 0.017 78.1)
-
Step 950
950
#292621
oklch(27% 0.01 80.6)
#423C33 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) | #3F3C32 | 0.006 |
| Deuteranopia (no green cones) | #403D33 | 0.005 |
| Tritanopia (no blue cones) | #453A39 | 0.015 |
| Achromatopsia (no color) | #3D3D3D | 0.017 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #423C33
#423C33
oklch(35.9% 0.017 78.1)
- #373D46
#373D46
oklch(35.8% 0.018 258.4)
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 #423C33, 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 0.034
- Charcoal #264653 ΔE 0.061
- Gunmetal #293241 ΔE 0.064
- Dark Slate Gray #2F4F4F ΔE 0.065
- Pakistan Green #283618 ΔE 0.065
- Dark Blue Grey #1F3B4D ΔE 0.066
- Dark Olive #373E02 ΔE 0.067
Use #423C33 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.