#404337
Closest named color: Charcoal Grey (#3C4142). oklch(37.6% 0.02 118.8), rgb(64, 67, 55).
Aa
White text reads best on this color (10.11:1).
About this color
#404337 is a dark close to neutral grey. In OKLCH its lightness is 38%, its chroma 0.020. It has too little chroma to lean warm or cool. The nearest named color is Charcoal Grey (#3C4142), ΔE 0.022 away. White text reads best on it, at 10.11:1.
| Hue family | Neutrals |
| Lightness | dark (38%) |
| Chroma | close to neutral grey (0.020) |
| Temperature | neutral |
| Nearest name | Charcoal Grey (#3C4142) |
| Black text | 2.07:1 |
| White text | 10.11:1 |
Values
| HEX | #404337 |
| RGB | rgb(64, 67, 55) |
| HSL | hsl(75, 10%, 24%) |
| OKLCH | oklch(37.6% 0.02 118.8) |
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 #404337 | 10.11:1 | AAA | Lc -97.6 | Preferred for body text |
| Black text on #404337 | 2.07:1 | Fails | Lc 10.4 | Not readable |
| #404337 text on white | 10.11:1 | AAA | Lc 93.5 | Preferred for body text |
| #404337 text on black | 2.07:1 | Fails | Lc -9.0 | 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
#F5F6F4
oklch(97.2% 0.003 128.5)
-
Step 100
100
#E9EAE7
oklch(93.5% 0.004 121.6)
-
Step 200
200
#D8DAD4
oklch(88.5% 0.008 121.6)
-
Step 300
300
#BFC2B7
oklch(80.9% 0.016 119.2)
-
Step 400
400
#9FA392
oklch(70.7% 0.025 117.8)
-
Step 500
500
#878C77
oklch(63% 0.031 118.2)
-
Step 600
600
#717660
oklch(55.5% 0.033 117.9)
-
Step 700
700
#5F634F
oklch(49% 0.031 116.7)
-
Step 800
800
#4D5141
oklch(42.6% 0.026 118.9)
-
Step 900
900 (this color)
#404337
oklch(37.6% 0.02 118.8)
-
Step 950
950
#262720
oklch(26.9% 0.013 113.9)
#404337 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) | #454236 | 0.008 |
| Deuteranopia (no green cones) | #444237 | 0.007 |
| Tritanopia (no blue cones) | #414240 | 0.017 |
| Achromatopsia (no color) | #424242 | 0.020 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #404337
#404337
oklch(37.6% 0.02 118.8)
- #433F4B
#433F4B
oklch(37.6% 0.021 300.6)
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 #404337, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Charcoal Grey #3C4142 ΔE 0.022
- Onyx #343A40 ΔE 0.043
- Dark Slate Gray #2F4F4F ΔE 0.047
- Charcoal #264653 ΔE 0.053
- Dark Teal #014D4E ΔE 0.064
- Dark Grey Blue #29465B ΔE 0.064
- Dark Olive #373E02 ΔE 0.065
- Dark Blue Green #005249 ΔE 0.066
Use #404337 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.