#403A84
Closest named color: Dark Slate Blue (#483D8B). oklch(39.6% 0.12 283.1), rgb(64, 58, 132).
Aa
White text reads best on this color (9.73:1).
About this color
#403A84 is a dark, moderately saturated purple. In OKLCH its lightness is 40%, its chroma 0.120 and its hue 283°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Slate Blue (#483D8B), ΔE 0.020 away. White text reads best on it, at 9.73:1.
| Hue family | Purples |
| Lightness | dark (40%) |
| Chroma | moderately saturated (0.120) |
| Temperature | cool |
| Nearest name | Dark Slate Blue (#483D8B) |
| Black text | 2.15:1 |
| White text | 9.73:1 |
Values
| HEX | #403A84 |
| RGB | rgb(64, 58, 132) |
| HSL | hsl(245, 39%, 37%) |
| OKLCH | oklch(39.6% 0.12 283.1) |
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 #403A84 | 9.73:1 | AAA | Lc -96.5 | Preferred for body text |
| Black text on #403A84 | 2.15:1 | Fails | Lc 11.6 | Not readable |
| #403A84 text on white | 9.73:1 | AAA | Lc 92.3 | Preferred for body text |
| #403A84 text on black | 2.15:1 | Fails | Lc -10.1 | 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
#F4F5FE
oklch(97.2% 0.012 281.1)
-
Step 100
100
#E7E8FB
oklch(93.6% 0.026 283.5)
-
Step 200
200
#D4D6FA
oklch(88.6% 0.049 282.8)
-
Step 300
300
#B8BAFA
oklch(81% 0.09 282.8)
-
Step 400
400
#9593F7
oklch(70.7% 0.144 283)
-
Step 500
500
#7E74F3
oklch(63.1% 0.184 283.3)
-
Step 600
600
#6959E2
oklch(55.7% 0.2 283.1)
-
Step 700
700
#5848C4
oklch(49.2% 0.185 283.1)
-
Step 800
800
#483C9F
oklch(42.8% 0.154 283.2)
-
Step 900
900 (this color)
#403A84
oklch(39.6% 0.12 283.1)
-
Step 950
950
#221F4A
oklch(26.9% 0.077 283)
#403A84 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) | #104687 | 0.057 |
| Deuteranopia (no green cones) | #094282 | 0.059 |
| Tritanopia (no blue cones) | #274B59 | 0.103 |
| Achromatopsia (no color) | #444444 | 0.120 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #403A84
#403A84
oklch(39.6% 0.12 283.1)
- #4F4800
#4F4800
oklch(39.6% 0.083 103.2)
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 #403A84, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Slate Blue #483D8B ΔE 0.020
- Blueberry #464196 ΔE 0.036
- Cobalt #1E488F ΔE 0.052
- Twilight Blue #0A437A ΔE 0.063
- Twilight #4E518B ΔE 0.069
- Dusk Blue #26538D ΔE 0.071
- Light Navy #155084 ΔE 0.071
- Sapphire #2138AB ΔE 0.076
Use #403A84 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.