#403A7A
Closest named color: Dark Slate Blue (#483D8B). oklch(38.9% 0.105 284.6), rgb(64, 58, 122).
Aa
White text reads best on this color (9.97:1).
About this color
#403A7A is a dark, moderately saturated purple. In OKLCH its lightness is 39%, its chroma 0.105 and its hue 285°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Slate Blue (#483D8B), ΔE 0.032 away. White text reads best on it, at 9.97:1.
| Hue family | Purples |
| Lightness | dark (39%) |
| Chroma | moderately saturated (0.105) |
| Temperature | cool |
| Nearest name | Dark Slate Blue (#483D8B) |
| Black text | 2.10:1 |
| White text | 9.97:1 |
Values
| HEX | #403A7A |
| RGB | rgb(64, 58, 122) |
| HSL | hsl(246, 36%, 35%) |
| OKLCH | oklch(38.9% 0.105 284.6) |
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 #403A7A | 9.97:1 | AAA | Lc -97.1 | Preferred for body text |
| Black text on #403A7A | 2.10:1 | Fails | Lc 11.0 | Not readable |
| #403A7A text on white | 9.97:1 | AAA | Lc 93.0 | Preferred for body text |
| #403A7A text on black | 2.10:1 | 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
#F4F5FD
oklch(97.2% 0.011 280.5)
-
Step 100
100
#E8E8F9
oklch(93.6% 0.023 286)
-
Step 200
200
#D5D6F6
oklch(88.5% 0.044 284)
-
Step 300
300
#BABAF2
oklch(80.8% 0.079 284.5)
-
Step 400
400
#9895EC
oklch(70.8% 0.126 284.3)
-
Step 500
500
#8178E6
oklch(63.2% 0.161 284.5)
-
Step 600
600
#6C5ED4
oklch(55.7% 0.175 284.6)
-
Step 700
700
#5A4CB8
oklch(49.1% 0.164 284.5)
-
Step 800
800
#4A3F95
oklch(42.7% 0.136 284.9)
-
Step 900
900 (this color)
#403A7A
oklch(38.9% 0.105 284.6)
-
Step 950
950
#232145
oklch(27% 0.065 283.6)
#403A7A 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) | #1D447C | 0.049 |
| Deuteranopia (no green cones) | #1B4079 | 0.048 |
| Tritanopia (no blue cones) | #2D4854 | 0.090 |
| Achromatopsia (no color) | #424242 | 0.106 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #403A7A
#403A7A
oklch(38.9% 0.105 284.6)
- #4C4700
#4C4700
oklch(39% 0.083 105)
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 #403A7A, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Slate Blue #483D8B ΔE 0.032
- Blueberry #464196 ΔE 0.050
- Cobalt #1E488F ΔE 0.059
- Twilight Blue #0A437A ΔE 0.059
- Light Navy #155084 ΔE 0.071
- Twilight #4E518B ΔE 0.072
- Dusk Blue #26538D ΔE 0.074
- Marine Blue #01386A ΔE 0.076
Use #403A7A 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.