#404355
Closest named color: Dark Grey Blue (#29465B). oklch(38.7% 0.031 277.5), rgb(64, 67, 85).
Aa
White text reads best on this color (9.75:1).
About this color
#404355 is a dark, muted blue. In OKLCH its lightness is 39%, its chroma 0.031 and its hue 277°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Grey Blue (#29465B), ΔE 0.032 away. White text reads best on it, at 9.75:1.
| Hue family | Blues |
| Lightness | dark (39%) |
| Chroma | muted (0.031) |
| Temperature | cool |
| Nearest name | Dark Grey Blue (#29465B) |
| Black text | 2.15:1 |
| White text | 9.75:1 |
Values
| HEX | #404355 |
| RGB | rgb(64, 67, 85) |
| HSL | hsl(231, 14%, 29%) |
| OKLCH | oklch(38.7% 0.031 277.5) |
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 #404355 | 9.75:1 | AAA | Lc -96.8 | Preferred for body text |
| Black text on #404355 | 2.15:1 | Fails | Lc 11.3 | Not readable |
| #404355 text on white | 9.75:1 | AAA | Lc 92.6 | Preferred for body text |
| #404355 text on black | 2.15:1 | 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
#E8E9EE
oklch(93.5% 0.007 277.2)
-
Step 200
200
#D7D8E2
oklch(88.4% 0.014 281.5)
-
Step 300
300
#BDC0D0
oklch(81% 0.023 277.4)
-
Step 400
400
#9A9FB8
oklch(70.7% 0.037 276.5)
-
Step 500
500
#8287A6
oklch(63% 0.047 277.8)
-
Step 600
600
#6C7192
oklch(55.7% 0.052 277.9)
-
Step 700
700
#5A5E7C
oklch(49% 0.048 278.5)
-
Step 800
800
#494D65
oklch(42.6% 0.04 277.2)
-
Step 900
900 (this color)
#404355
oklch(38.7% 0.031 277.5)
-
Step 950
950
#242630
oklch(27.1% 0.019 276.2)
#404355 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) | #3E4556 | 0.006 |
| Deuteranopia (no green cones) | #3D4355 | 0.005 |
| Tritanopia (no blue cones) | #3B4649 | 0.027 |
| Achromatopsia (no color) | #444444 | 0.031 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #404355
#404355
oklch(38.7% 0.031 277.5)
- #494532
#494532
oklch(38.9% 0.031 97.6)
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 #404355, 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
- Onyx #343A40 ΔE 0.047
- Dark Slate Gray #2F4F4F ΔE 0.048
- Dark Blue Grey #1F3B4D ΔE 0.057
- Dark Teal #014D4E ΔE 0.067
- Prussian Blue #1D3557 ΔE 0.072
Use #404355 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.