#403D5A
Closest named color: Dark Grey Blue (#29465B). oklch(37.6% 0.049 288.5), rgb(64, 61, 90).
Aa
White text reads best on this color (10.32:1).
About this color
#403D5A is a dark, muted purple. In OKLCH its lightness is 38%, its chroma 0.049 and its hue 289°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Grey Blue (#29465B), ΔE 0.040 away. White text reads best on it, at 10.32:1.
| Hue family | Purples |
| Lightness | dark (38%) |
| Chroma | muted (0.049) |
| Temperature | cool |
| Nearest name | Dark Grey Blue (#29465B) |
| Black text | 2.03:1 |
| White text | 10.32:1 |
Values
| HEX | #403D5A |
| RGB | rgb(64, 61, 90) |
| HSL | hsl(246, 19%, 30%) |
| OKLCH | oklch(37.6% 0.049 288.5) |
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 #403D5A | 10.32:1 | AAA | Lc -98.0 | Preferred for body text |
| Black text on #403D5A | 2.03:1 | Fails | Lc 10.0 | Not readable |
| #403D5A text on white | 10.32:1 | AAA | Lc 94.0 | Preferred for body text |
| #403D5A text on black | 2.03:1 | Fails | Lc -8.6 | 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
#D8D7E6
oklch(88.4% 0.02 289)
-
Step 300
300
#BFBDD8
oklch(80.9% 0.038 288.9)
-
Step 400
400
#9E9BC4
oklch(70.6% 0.059 288.1)
-
Step 500
500
#8782B5
oklch(63% 0.076 288.5)
-
Step 600
600
#716BA1
oklch(55.5% 0.083 288.5)
-
Step 700
700
#5F598A
oklch(49.1% 0.078 288.8)
-
Step 800
800
#4D4970
oklch(42.6% 0.064 288.1)
-
Step 900
900 (this color)
#403D5A
oklch(37.6% 0.049 288.5)
-
Step 950
950
#262435
oklch(27% 0.031 289.5)
#403D5A 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) | #35415B | 0.020 |
| Deuteranopia (no green cones) | #354059 | 0.019 |
| Tritanopia (no blue cones) | #3A4247 | 0.043 |
| Achromatopsia (no color) | #404040 | 0.049 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #403D5A
#403D5A
oklch(37.6% 0.049 288.5)
- #434323
#434323
oklch(37.4% 0.049 108.6)
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 #403D5A, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Grey Blue #29465B ΔE 0.040
- Charcoal #264653 ΔE 0.048
- Charcoal Grey #3C4142 ΔE 0.048
- Onyx #343A40 ΔE 0.050
- Dark Blue Grey #1F3B4D ΔE 0.055
- Prussian Blue #1D3557 ΔE 0.060
- Gunmetal #293241 ΔE 0.066
- Dark Slate Gray #2F4F4F ΔE 0.069
Use #403D5A 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.