#404658
Closest named color: Dark Grey Blue (#29465B). oklch(39.6% 0.032 270.5), rgb(64, 70, 88).
Aa
White text reads best on this color (9.39:1).
About this color
#404658 is a dark, muted blue. In OKLCH its lightness is 40%, its chroma 0.032 and its hue 271°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Grey Blue (#29465B), ΔE 0.031 away. White text reads best on it, at 9.39:1.
| Hue family | Blues |
| Lightness | dark (40%) |
| Chroma | muted (0.032) |
| Temperature | cool |
| Nearest name | Dark Grey Blue (#29465B) |
| Black text | 2.23:1 |
| White text | 9.39:1 |
Values
| HEX | #404658 |
| RGB | rgb(64, 70, 88) |
| HSL | hsl(225, 16%, 30%) |
| OKLCH | oklch(39.6% 0.032 270.5) |
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 #404658 | 9.39:1 | AAA | Lc -96.0 | Preferred for body text |
| Black text on #404658 | 2.23:1 | Fails | Lc 12.2 | Not readable |
| #404658 text on white | 9.39:1 | AAA | Lc 91.7 | Preferred for body text |
| #404658 text on black | 2.23:1 | Fails | Lc -10.7 | 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
#F4F5F8
oklch(97% 0.004 271.4)
-
Step 100
100
#E8EAEF
oklch(93.7% 0.007 268.5)
-
Step 200
200
#D6D9E2
oklch(88.6% 0.013 271.3)
-
Step 300
300
#BBC0D0
oklch(80.9% 0.023 272)
-
Step 400
400
#97A0B9
oklch(70.7% 0.038 269.7)
-
Step 500
500
#7E88A7
oklch(63% 0.048 271)
-
Step 600
600
#677293
oklch(55.6% 0.053 270.3)
-
Step 700
700
#56607D
oklch(49.2% 0.048 269.8)
-
Step 800
800
#464E66
oklch(42.7% 0.041 270.3)
-
Step 900
900 (this color)
#404658
oklch(39.6% 0.032 270.5)
-
Step 950
950
#232630
oklch(27% 0.019 272)
#404658 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) | #414759 | 0.004 |
| Deuteranopia (no green cones) | #3F4558 | 0.004 |
| Tritanopia (no blue cones) | #3A494C | 0.027 |
| Achromatopsia (no color) | #464646 | 0.032 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #404658
#404658
oklch(39.6% 0.032 270.5)
- #4D4633
#4D4633
oklch(39.6% 0.032 90.2)
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 #404658, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Grey Blue #29465B ΔE 0.031
- Charcoal #264653 ΔE 0.037
- Charcoal Grey #3C4142 ΔE 0.038
- Dark Slate Gray #2F4F4F ΔE 0.043
- Onyx #343A40 ΔE 0.055
- Dark Blue Grey #1F3B4D ΔE 0.063
- Dark Teal #014D4E ΔE 0.065
- Deep Teal #00555A ΔE 0.066
Use #404658 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.