#403F68
Closest named color: Dark Grey Blue (#29465B). oklch(38.8% 0.069 283.8), rgb(64, 63, 104).
Aa
White text reads best on this color (9.86:1).
About this color
#403F68 is a dark, muted purple. In OKLCH its lightness is 39%, its chroma 0.069 and its hue 284°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Grey Blue (#29465B), ΔE 0.047 away. White text reads best on it, at 9.86:1.
| Hue family | Purples |
| Lightness | dark (39%) |
| Chroma | muted (0.069) |
| Temperature | cool |
| Nearest name | Dark Grey Blue (#29465B) |
| Black text | 2.12:1 |
| White text | 9.86:1 |
Values
| HEX | #403F68 |
| RGB | rgb(64, 63, 104) |
| HSL | hsl(241, 25%, 33%) |
| OKLCH | oklch(38.8% 0.069 283.8) |
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 #403F68 | 9.86:1 | AAA | Lc -97.0 | Preferred for body text |
| Black text on #403F68 | 2.12:1 | Fails | Lc 11.1 | Not readable |
| #403F68 text on white | 9.86:1 | AAA | Lc 92.8 | Preferred for body text |
| #403F68 text on black | 2.12:1 | Fails | Lc -9.6 | 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
#9A9AD3
oklch(70.7% 0.083 284.1)
-
Step 500
500
#8280C7
oklch(63.1% 0.106 284.2)
-
Step 600
600
#6C69B4
oklch(55.7% 0.115 283.8)
-
Step 700
700
#5A579B
oklch(49.2% 0.107 283.7)
-
Step 800
800
#49477D
oklch(42.6% 0.088 283.7)
-
Step 900
900 (this color)
#403F68
oklch(38.8% 0.069 283.8)
-
Step 950
950
#24233B
oklch(26.9% 0.044 284.9)
#403F68 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) | #32456A | 0.025 |
| Deuteranopia (no green cones) | #304267 | 0.025 |
| Tritanopia (no blue cones) | #35474E | 0.060 |
| Achromatopsia (no color) | #434343 | 0.069 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #403F68
#403F68
oklch(38.8% 0.069 283.8)
- #4B4614
#4B4614
oklch(38.8% 0.069 103.6)
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 #403F68, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Grey Blue #29465B ΔE 0.047
- Charcoal #264653 ΔE 0.060
- Twilight Blue #0A437A ΔE 0.061
- Dark Slate Blue #483D8B ΔE 0.062
- Prussian Blue #1D3557 ΔE 0.068
- Charcoal Grey #3C4142 ΔE 0.069
- Dark Blue Grey #1F3B4D ΔE 0.070
- Light Navy #155084 ΔE 0.070
Use #403F68 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.