#404354
Closest named color: Charcoal Grey (#3C4142). oklch(38.7% 0.029 277.1), rgb(64, 67, 84).
Aa
White text reads best on this color (9.77:1).
About this color
#404354 is a dark close to neutral grey. In OKLCH its lightness is 39%, its chroma 0.029. It has too little chroma to lean warm or cool. The nearest named color is Charcoal Grey (#3C4142), ΔE 0.031 away. White text reads best on it, at 9.77:1.
| Hue family | Neutrals |
| Lightness | dark (39%) |
| Chroma | close to neutral grey (0.029) |
| Temperature | neutral |
| Nearest name | Charcoal Grey (#3C4142) |
| Black text | 2.14:1 |
| White text | 9.77:1 |
Values
| HEX | #404354 |
| RGB | rgb(64, 67, 84) |
| HSL | hsl(231, 14%, 29%) |
| OKLCH | oklch(38.7% 0.029 277.1) |
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 #404354 | 9.77:1 | AAA | Lc -96.9 | Preferred for body text |
| Black text on #404354 | 2.14:1 | Fails | Lc 11.3 | Not readable |
| #404354 text on white | 9.77:1 | AAA | Lc 92.7 | Preferred for body text |
| #404354 text on black | 2.14:1 | Fails | Lc -9.8 | 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
#F5F5F7
oklch(97.1% 0.003 286.4)
-
Step 100
100
#E9E9EE
oklch(93.5% 0.007 286.3)
-
Step 200
200
#D7D9E1
oklch(88.6% 0.011 274.9)
-
Step 300
300
#BDC0CF
oklch(81% 0.021 276.9)
-
Step 400
400
#9B9FB7
oklch(70.7% 0.035 278)
-
Step 500
500
#8287A5
oklch(63% 0.045 277.6)
-
Step 600
600
#6C7190
oklch(55.6% 0.048 277.6)
-
Step 700
700
#5A5F7B
oklch(49.2% 0.045 276.7)
-
Step 800
800
#4A4D64
oklch(42.7% 0.038 278.8)
-
Step 900
900 (this color)
#404354
oklch(38.7% 0.029 277.1)
-
Step 950
950
#242630
oklch(27.1% 0.019 276.2)
#404354 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) | #3E4555 | 0.006 |
| Deuteranopia (no green cones) | #3D4354 | 0.005 |
| Tritanopia (no blue cones) | #3B4649 | 0.026 |
| Achromatopsia (no color) | #444444 | 0.029 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #404354
#404354
oklch(38.7% 0.029 277.1)
- #484433
#484433
oklch(38.5% 0.028 96.4)
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 #404354, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Charcoal Grey #3C4142 ΔE 0.031
- Dark Grey Blue #29465B ΔE 0.032
- Charcoal #264653 ΔE 0.036
- Onyx #343A40 ΔE 0.046
- Dark Slate Gray #2F4F4F ΔE 0.047
- Dark Blue Grey #1F3B4D ΔE 0.057
- Dark Teal #014D4E ΔE 0.067
- Deep Teal #00555A ΔE 0.072
Use #404354 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.