#404455
Closest named color: Dark Grey Blue (#29465B). oklch(39% 0.029 274.6), rgb(64, 68, 85).
Aa
White text reads best on this color (9.65:1).
About this color
#404455 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 Dark Grey Blue (#29465B), ΔE 0.032 away. White text reads best on it, at 9.65:1.
| Hue family | Neutrals |
| Lightness | dark (39%) |
| Chroma | close to neutral grey (0.029) |
| Temperature | neutral |
| Nearest name | Dark Grey Blue (#29465B) |
| Black text | 2.17:1 |
| White text | 9.65:1 |
Values
| HEX | #404455 |
| RGB | rgb(64, 68, 85) |
| HSL | hsl(229, 14%, 29%) |
| OKLCH | oklch(39% 0.029 274.6) |
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 #404455 | 9.65:1 | AAA | Lc -96.6 | Preferred for body text |
| Black text on #404455 | 2.17:1 | Fails | Lc 11.6 | Not readable |
| #404455 text on white | 9.65:1 | AAA | Lc 92.4 | Preferred for body text |
| #404455 text on black | 2.17:1 | Fails | Lc -10.1 | 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
#E8EAEE
oklch(93.7% 0.006 264.5)
-
Step 200
200
#D6D9E1
oklch(88.5% 0.011 269.5)
-
Step 300
300
#BCC0CF
oklch(80.9% 0.021 274)
-
Step 400
400
#9A9FB7
oklch(70.6% 0.035 276.2)
-
Step 500
500
#8188A5
oklch(63.1% 0.044 274.4)
-
Step 600
600
#6A7190
oklch(55.4% 0.049 274.8)
-
Step 700
700
#595F7B
oklch(49.1% 0.046 275.2)
-
Step 800
800
#494E64
oklch(42.8% 0.037 274.7)
-
Step 900
900 (this color)
#404455
oklch(39% 0.029 274.6)
-
Step 950
950
#242630
oklch(27.1% 0.019 276.2)
#404455 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) | #3F4556 | 0.003 |
| Deuteranopia (no green cones) | #3E4455 | 0.003 |
| Tritanopia (no blue cones) | #3B474A | 0.026 |
| Achromatopsia (no color) | #454545 | 0.029 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #404455
#404455
oklch(39% 0.029 274.6)
- #4A4533
#4A4533
oklch(39% 0.03 94.4)
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 #404455, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Grey Blue #29465B ΔE 0.032
- Charcoal Grey #3C4142 ΔE 0.033
- Charcoal #264653 ΔE 0.036
- Dark Slate Gray #2F4F4F ΔE 0.045
- Onyx #343A40 ΔE 0.048
- Dark Blue Grey #1F3B4D ΔE 0.059
- Dark Teal #014D4E ΔE 0.066
- Deep Teal #00555A ΔE 0.070
Use #404455 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.