#403D69
Closest named color: Dark Grey Blue (#29465B). oklch(38.4% 0.074 285.5), rgb(64, 61, 105).
Aa
White text reads best on this color (10.05:1).
About this color
#403D69 is a dark, moderately saturated purple. In OKLCH its lightness is 38%, its chroma 0.074 and its hue 285°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Grey Blue (#29465B), ΔE 0.052 away. White text reads best on it, at 10.05:1.
| Hue family | Purples |
| Lightness | dark (38%) |
| Chroma | moderately saturated (0.074) |
| Temperature | cool |
| Nearest name | Dark Grey Blue (#29465B) |
| Black text | 2.08:1 |
| White text | 10.05:1 |
Values
| HEX | #403D69 |
| RGB | rgb(64, 61, 105) |
| HSL | hsl(244, 27%, 33%) |
| OKLCH | oklch(38.4% 0.074 285.5) |
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 #403D69 | 10.05:1 | AAA | Lc -97.4 | Preferred for body text |
| Black text on #403D69 | 2.08:1 | Fails | Lc 10.7 | Not readable |
| #403D69 text on white | 10.05:1 | AAA | Lc 93.3 | Preferred for body text |
| #403D69 text on black | 2.08:1 | Fails | Lc -9.2 | 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
#F5F5FA
oklch(97.2% 0.007 286.3)
-
Step 100
100
#E8E9F4
oklch(93.6% 0.015 281.9)
-
Step 200
200
#D7D7ED
oklch(88.6% 0.03 285.8)
-
Step 300
300
#BCBCE4
oklch(80.8% 0.056 285.1)
-
Step 400
400
#9B99D6
oklch(70.7% 0.088 285.4)
-
Step 500
500
#837FCB
oklch(63.2% 0.113 285.1)
-
Step 600
600
#6D67B8
oklch(55.6% 0.123 285)
-
Step 700
700
#5C559E
oklch(49.1% 0.114 285.8)
-
Step 800
800
#4B4680
oklch(42.7% 0.094 285.6)
-
Step 900
900 (this color)
#403D69
oklch(38.4% 0.074 285.5)
-
Step 950
950
#24233C
oklch(27% 0.046 284.7)
#403D69 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) | #2F436B | 0.028 |
| Deuteranopia (no green cones) | #2E4168 | 0.028 |
| Tritanopia (no blue cones) | #35454E | 0.062 |
| Achromatopsia (no color) | #424242 | 0.074 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #403D69
#403D69
oklch(38.4% 0.074 285.5)
- #49450D
#49450D
oklch(38.3% 0.073 105.2)
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 #403D69, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Grey Blue #29465B ΔE 0.052
- Dark Slate Blue #483D8B ΔE 0.059
- Twilight Blue #0A437A ΔE 0.061
- Charcoal #264653 ΔE 0.064
- Prussian Blue #1D3557 ΔE 0.066
- Dark Blue Grey #1F3B4D ΔE 0.071
- Marine Blue #01386A ΔE 0.072
- Light Navy #155084 ΔE 0.073
Use #403D69 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.