#403A63
Closest named color: Dark Grey Blue (#29465B). oklch(37.4% 0.069 289.3), rgb(64, 58, 99).
Aa
White text reads best on this color (10.48:1).
About this color
#403A63 is a dark, muted purple. In OKLCH its lightness is 37%, its chroma 0.069 and its hue 289°. 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 10.48:1.
| Hue family | Purples |
| Lightness | dark (37%) |
| Chroma | muted (0.069) |
| Temperature | cool |
| Nearest name | Dark Grey Blue (#29465B) |
| Black text | 2.00:1 |
| White text | 10.48:1 |
Values
| HEX | #403A63 |
| RGB | rgb(64, 58, 99) |
| HSL | hsl(249, 26%, 31%) |
| OKLCH | oklch(37.4% 0.069 289.3) |
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 #403A63 | 10.48:1 | AAA | Lc -98.3 | Preferred for body text |
| Black text on #403A63 | 2.00:1 | Fails | Lc 9.7 | Not readable |
| #403A63 text on white | 10.48:1 | AAA | Lc 94.3 | Preferred for body text |
| #403A63 text on black | 2.00:1 | Fails | Lc -8.3 | 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
#E9E8F4
oklch(93.5% 0.016 289.9)
-
Step 200
200
#D8D6EC
oklch(88.4% 0.03 289.9)
-
Step 300
300
#BFBCE1
oklch(81% 0.052 288.9)
-
Step 400
400
#9F98D2
oklch(70.7% 0.084 289.6)
-
Step 500
500
#887EC5
oklch(63.1% 0.106 289.5)
-
Step 600
600
#7266B2
oklch(55.5% 0.116 289.3)
-
Step 700
700
#605599
oklch(49.2% 0.107 289.3)
-
Step 800
800
#4E467C
oklch(42.8% 0.088 288.9)
-
Step 900
900 (this color)
#403A63
oklch(37.4% 0.069 289.3)
-
Step 950
950
#26233A
oklch(27.1% 0.042 289.2)
#403A63 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) | #2E4065 | 0.030 |
| Deuteranopia (no green cones) | #2E3E62 | 0.029 |
| Tritanopia (no blue cones) | #374249 | 0.060 |
| Achromatopsia (no color) | #3F3F3F | 0.070 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #403A63
#403A63
oklch(37.4% 0.069 289.3)
- #444412
#444412
oklch(37.6% 0.069 109.3)
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 #403A63, 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
- Prussian Blue #1D3557 ΔE 0.060
- Charcoal #264653 ΔE 0.063
- Dark Blue Grey #1F3B4D ΔE 0.064
- Onyx #343A40 ΔE 0.066
- Twilight Blue #0A437A ΔE 0.067
- Charcoal Grey #3C4142 ΔE 0.068
- Dark Slate Blue #483D8B ΔE 0.069
Use #403A63 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.