#423944
Closest named color: Onyx (#343A40). oklch(35.8% 0.022 320.1), rgb(66, 57, 68).
Aa
White text reads best on this color (11.05:1).
About this color
#423944 is a dark close to neutral grey. In OKLCH its lightness is 36%, its chroma 0.022. 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 11.05:1.
| Hue family | Neutrals |
| Lightness | dark (36%) |
| Chroma | close to neutral grey (0.022) |
| Temperature | neutral |
| Nearest name | Onyx (#343A40) |
| Black text | 1.90:1 |
| White text | 11.05:1 |
Values
| HEX | #423944 |
| RGB | rgb(66, 57, 68) |
| HSL | hsl(289, 9%, 25%) |
| OKLCH | oklch(35.8% 0.022 320.1) |
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 #423944 | 11.05:1 | AAA | Lc -99.4 | Preferred for body text |
| Black text on #423944 | 1.90:1 | Fails | Lc 8.3 | Not readable |
| #423944 text on white | 11.05:1 | AAA | Lc 95.6 | Preferred for body text |
| #423944 text on black | 1.90:1 | 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
#EBE9EC
oklch(93.6% 0.005 314.8)
-
Step 200
200
#DCD7DD
oklch(88.5% 0.01 320.5)
-
Step 300
300
#C6BDC7
oklch(80.9% 0.017 322.7)
-
Step 400
400
#A89BAB
oklch(70.6% 0.027 319.9)
-
Step 500
500
#938397
oklch(63.1% 0.035 319.5)
-
Step 600
600
#7D6D81
oklch(55.7% 0.036 319.5)
-
Step 700
700
#6A5B6D
oklch(49.2% 0.034 320.6)
-
Step 800
800
#564A59
oklch(42.7% 0.029 319.5)
-
Step 900
900 (this color)
#423944
oklch(35.8% 0.022 320.1)
-
Step 950
950
#2A242B
oklch(27% 0.015 321.4)
#423944 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) | #383B44 | 0.018 |
| Deuteranopia (no green cones) | #3A3C44 | 0.016 |
| Tritanopia (no blue cones) | #423A3D | 0.014 |
| Achromatopsia (no color) | #3C3C3C | 0.022 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #423944
#423944
oklch(35.8% 0.022 320.1)
- #374035
#374035
oklch(36% 0.022 140)
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 #423944, 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 0.028
- Gunmetal #293241 ΔE 0.050
- Dark Blue Grey #1F3B4D ΔE 0.052
- Charcoal #264653 ΔE 0.053
- Dark Grey Blue #29465B ΔE 0.056
- Space Cadet #2B2D42 ΔE 0.059
- Prussian Blue #1D3557 ΔE 0.068
Use #423944 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.