#40405D
Closest named color: Dark Grey Blue (#29465B). oklch(38.4% 0.049 283.9), rgb(64, 64, 93).
Aa
White text reads best on this color (9.95:1).
About this color
#40405D is a dark, muted purple. In OKLCH its lightness is 38%, its chroma 0.049 and its hue 284°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Grey Blue (#29465B), ΔE 0.036 away. White text reads best on it, at 9.95:1.
| Hue family | Purples |
| Lightness | dark (38%) |
| Chroma | muted (0.049) |
| Temperature | cool |
| Nearest name | Dark Grey Blue (#29465B) |
| Black text | 2.10:1 |
| White text | 9.95:1 |
Values
| HEX | #40405D |
| RGB | rgb(64, 64, 93) |
| HSL | hsl(240, 18%, 31%) |
| OKLCH | oklch(38.4% 0.049 283.9) |
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 #40405D | 9.95:1 | AAA | Lc -97.2 | Preferred for body text |
| Black text on #40405D | 2.10:1 | Fails | Lc 10.8 | Not readable |
| #40405D text on white | 9.95:1 | AAA | Lc 93.1 | Preferred for body text |
| #40405D text on black | 2.10:1 | Fails | Lc -9.4 | 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
#F5F5F9
oklch(97.1% 0.005 286.3)
-
Step 100
100
#E9E9F1
oklch(93.6% 0.011 286.2)
-
Step 200
200
#D7D8E7
oklch(88.6% 0.02 282.9)
-
Step 300
300
#BDBED8
oklch(80.9% 0.036 283.8)
-
Step 400
400
#9B9CC5
oklch(70.6% 0.06 283.7)
-
Step 500
500
#8384B6
oklch(63.2% 0.075 283.2)
-
Step 600
600
#6D6DA2
oklch(55.7% 0.082 283.4)
-
Step 700
700
#5B5B8B
oklch(49.2% 0.076 283.2)
-
Step 800
800
#4B4A70
oklch(42.7% 0.062 284.6)
-
Step 900
900 (this color)
#40405D
oklch(38.4% 0.049 283.9)
-
Step 950
950
#242435
oklch(26.8% 0.031 284.1)
#40405D 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) | #38445E | 0.016 |
| Deuteranopia (no green cones) | #37425C | 0.015 |
| Tritanopia (no blue cones) | #39454A | 0.043 |
| Achromatopsia (no color) | #434343 | 0.049 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #40405D
#40405D
oklch(38.4% 0.049 283.9)
- #484525
#484525
oklch(38.5% 0.049 103.8)
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 #40405D, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Grey Blue #29465B ΔE 0.036
- Charcoal #264653 ΔE 0.046
- Charcoal Grey #3C4142 ΔE 0.049
- Onyx #343A40 ΔE 0.055
- Dark Blue Grey #1F3B4D ΔE 0.059
- Dark Slate Gray #2F4F4F ΔE 0.064
- Prussian Blue #1D3557 ΔE 0.065
- Twilight Blue #0A437A ΔE 0.071
Use #40405D 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.