#403F69
Closest named color: Dark Grey Blue (#29465B). oklch(38.9% 0.07 283.7), rgb(64, 63, 105).
Aa
White text reads best on this color (9.84:1).
About this color
#403F69 is a dark, moderately saturated purple. In OKLCH its lightness is 39%, its chroma 0.070 and its hue 284°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Grey Blue (#29465B), ΔE 0.048 away. White text reads best on it, at 9.84:1.
| Hue family | Purples |
| Lightness | dark (39%) |
| Chroma | moderately saturated (0.070) |
| Temperature | cool |
| Nearest name | Dark Grey Blue (#29465B) |
| Black text | 2.13:1 |
| White text | 9.84:1 |
Values
| HEX | #403F69 |
| RGB | rgb(64, 63, 105) |
| HSL | hsl(241, 25%, 33%) |
| OKLCH | oklch(38.9% 0.07 283.7) |
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 #403F69 | 9.84:1 | AAA | Lc -96.9 | Preferred for body text |
| Black text on #403F69 | 2.13:1 | Fails | Lc 11.2 | Not readable |
| #403F69 text on white | 9.84:1 | AAA | Lc 92.8 | Preferred for body text |
| #403F69 text on black | 2.13:1 | Fails | Lc -9.7 | 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
#D6D7EC
oklch(88.5% 0.029 283.6)
-
Step 300
300
#BCBDE2
oklch(81% 0.052 284)
-
Step 400
400
#999AD4
oklch(70.7% 0.084 283.3)
-
Step 500
500
#8180C9
oklch(63.1% 0.109 283.5)
-
Step 600
600
#6B68B5
oklch(55.5% 0.118 283.6)
-
Step 700
700
#5A569C
oklch(49% 0.11 284.2)
-
Step 800
800
#49477E
oklch(42.6% 0.09 283.6)
-
Step 900
900 (this color)
#403F69
oklch(38.9% 0.07 283.7)
-
Step 950
950
#24233C
oklch(27% 0.046 284.7)
#403F69 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) | #31456B | 0.026 |
| Deuteranopia (no green cones) | #304268 | 0.025 |
| Tritanopia (no blue cones) | #35474F | 0.060 |
| Achromatopsia (no color) | #434343 | 0.071 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #403F69
#403F69
oklch(38.9% 0.07 283.7)
- #4B4612
#4B4612
oklch(38.8% 0.071 103.8)
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 #403F69, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Grey Blue #29465B ΔE 0.048
- Dark Slate Blue #483D8B ΔE 0.060
- Twilight Blue #0A437A ΔE 0.061
- Charcoal #264653 ΔE 0.061
- Prussian Blue #1D3557 ΔE 0.069
- Light Navy #155084 ΔE 0.069
- Dark Blue Grey #1F3B4D ΔE 0.071
- Charcoal Grey #3C4142 ΔE 0.071
Use #403F69 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.