#403E63
Closest named color: Dark Grey Blue (#29465B). oklch(38.3% 0.062 285.5), rgb(64, 62, 99).
Aa
White text reads best on this color (10.06:1).
About this color
#403E63 is a dark, muted purple. In OKLCH its lightness is 38%, its chroma 0.062 and its hue 286°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Grey Blue (#29465B), ΔE 0.044 away. White text reads best on it, at 10.06:1.
| Hue family | Purples |
| Lightness | dark (38%) |
| Chroma | muted (0.062) |
| Temperature | cool |
| Nearest name | Dark Grey Blue (#29465B) |
| Black text | 2.08:1 |
| White text | 10.06:1 |
Values
| HEX | #403E63 |
| RGB | rgb(64, 62, 99) |
| HSL | hsl(243, 23%, 32%) |
| OKLCH | oklch(38.3% 0.062 285.5) |
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 #403E63 | 10.06:1 | AAA | Lc -97.4 | Preferred for body text |
| Black text on #403E63 | 2.08:1 | Fails | Lc 10.6 | Not readable |
| #403E63 text on white | 10.06:1 | AAA | Lc 93.3 | Preferred for body text |
| #403E63 text on black | 2.08:1 | Fails | Lc -9.2 | 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
#E9E9F3
oklch(93.7% 0.013 286.1)
-
Step 200
200
#D7D7EA
oklch(88.5% 0.026 285.9)
-
Step 300
300
#BDBDDE
oklch(80.9% 0.046 285.3)
-
Step 400
400
#9C9ACE
oklch(70.7% 0.075 286.1)
-
Step 500
500
#8481C1
oklch(63.1% 0.095 285.5)
-
Step 600
600
#6E69AD
oklch(55.5% 0.104 285.8)
-
Step 700
700
#5C5895
oklch(49.2% 0.096 285.3)
-
Step 800
800
#4B4879
oklch(42.7% 0.08 285.3)
-
Step 900
900 (this color)
#403E63
oklch(38.3% 0.062 285.5)
-
Step 950
950
#252439
oklch(27.2% 0.039 285.7)
#403E63 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) | #334364 | 0.023 |
| Deuteranopia (no green cones) | #324162 | 0.022 |
| Tritanopia (no blue cones) | #37454C | 0.053 |
| Achromatopsia (no color) | #424242 | 0.062 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #403E63
#403E63
oklch(38.3% 0.062 285.5)
- #48451A
#48451A
oklch(38.3% 0.062 105.3)
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 #403E63, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Grey Blue #29465B ΔE 0.044
- Charcoal #264653 ΔE 0.055
- Charcoal Grey #3C4142 ΔE 0.062
- Dark Blue Grey #1F3B4D ΔE 0.064
- Prussian Blue #1D3557 ΔE 0.064
- Onyx #343A40 ΔE 0.065
- Twilight Blue #0A437A ΔE 0.065
- Dark Slate Blue #483D8B ΔE 0.070
Use #403E63 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.