#403D6F
Closest named color: Dark Slate Blue (#483D8B). oklch(38.8% 0.083 284.5), rgb(64, 61, 111).
Aa
White text reads best on this color (9.92:1).
About this color
#403D6F is a dark, moderately saturated purple. In OKLCH its lightness is 39%, its chroma 0.083 and its hue 285°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Slate Blue (#483D8B), ΔE 0.049 away. White text reads best on it, at 9.92:1.
| Hue family | Purples |
| Lightness | dark (39%) |
| Chroma | moderately saturated (0.083) |
| Temperature | cool |
| Nearest name | Dark Slate Blue (#483D8B) |
| Black text | 2.11:1 |
| White text | 9.92:1 |
Values
| HEX | #403D6F |
| RGB | rgb(64, 61, 111) |
| HSL | hsl(244, 29%, 34%) |
| OKLCH | oklch(38.8% 0.083 284.5) |
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 #403D6F | 9.92:1 | AAA | Lc -97.1 | Preferred for body text |
| Black text on #403D6F | 2.11:1 | Fails | Lc 11.0 | Not readable |
| #403D6F text on white | 9.92:1 | AAA | Lc 92.9 | Preferred for body text |
| #403D6F text on black | 2.11:1 | Fails | Lc -9.5 | 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
#F5F5FB
oklch(97.2% 0.008 286.3)
-
Step 100
100
#E8E8F6
oklch(93.5% 0.019 286)
-
Step 200
200
#D6D7F0
oklch(88.6% 0.034 283.9)
-
Step 300
300
#BBBCE8
oklch(80.9% 0.062 283.9)
-
Step 400
400
#9998DD
oklch(70.7% 0.1 284.2)
-
Step 500
500
#827DD3
oklch(63.1% 0.127 284.8)
-
Step 600
600
#6C65C0
oklch(55.7% 0.138 284.5)
-
Step 700
700
#5A53A6
oklch(49.1% 0.129 284.4)
-
Step 800
800
#4A4487
oklch(42.7% 0.108 284.9)
-
Step 900
900 (this color)
#403D6F
oklch(38.8% 0.083 284.5)
-
Step 950
950
#24223F
oklch(27% 0.053 285.4)
#403D6F 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) | #2B4471 | 0.033 |
| Deuteranopia (no green cones) | #2A416E | 0.033 |
| Tritanopia (no blue cones) | #324750 | 0.072 |
| Achromatopsia (no color) | #434343 | 0.084 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #403D6F
#403D6F
oklch(38.8% 0.083 284.5)
- #4C4600
#4C4600
oklch(38.8% 0.082 104)
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 #403D6F, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Slate Blue #483D8B ΔE 0.049
- Twilight Blue #0A437A ΔE 0.058
- Dark Grey Blue #29465B ΔE 0.059
- Blueberry #464196 ΔE 0.066
- Cobalt #1E488F ΔE 0.067
- Light Navy #155084 ΔE 0.069
- Prussian Blue #1D3557 ΔE 0.072
- Charcoal #264653 ΔE 0.072
Use #403D6F 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.