#40417D
Closest named color: Dark Slate Blue (#483D8B). oklch(40.6% 0.099 280.3), rgb(64, 65, 125).
Aa
White text reads best on this color (9.25:1).
About this color
#40417D is a dark, moderately saturated purple. In OKLCH its lightness is 41%, its chroma 0.099 and its hue 280°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Slate Blue (#483D8B), ΔE 0.030 away. White text reads best on it, at 9.25:1.
| Hue family | Purples |
| Lightness | dark (41%) |
| Chroma | moderately saturated (0.099) |
| Temperature | cool |
| Nearest name | Dark Slate Blue (#483D8B) |
| Black text | 2.27:1 |
| White text | 9.25:1 |
Values
| HEX | #40417D |
| RGB | rgb(64, 65, 125) |
| HSL | hsl(239, 32%, 37%) |
| OKLCH | oklch(40.6% 0.099 280.3) |
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 #40417D | 9.25:1 | AAA | Lc -95.5 | Preferred for body text |
| Black text on #40417D | 2.27:1 | Fails | Lc 12.8 | Not readable |
| #40417D text on white | 9.25:1 | AAA | Lc 91.2 | Preferred for body text |
| #40417D text on black | 2.27:1 | Fails | Lc -11.2 | 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 800.
-
Step 50
50
#F4F5FB
oklch(97.1% 0.008 278.6)
-
Step 100
100
#E7E9F5
oklch(93.6% 0.016 278.5)
-
Step 200
200
#D4D7EF
oklch(88.4% 0.033 280)
-
Step 300
300
#B9BDE6
oklch(80.9% 0.058 280.6)
-
Step 400
400
#959ADA
oklch(70.7% 0.093 280.3)
-
Step 500
500
#7C80CF
oklch(63% 0.118 280.2)
-
Step 600
600
#6668BC
oklch(55.5% 0.128 280.3)
-
Step 700
700
#5556A2
oklch(49% 0.12 280.5)
-
Step 800
800 (this color)
#40417D
oklch(40.6% 0.099 280.3)
-
Step 900
900
#3A3C69
oklch(37.7% 0.076 280.1)
-
Step 950
950
#22233E
oklch(26.9% 0.05 280.9)
#40417D 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) | #284A7F | 0.037 |
| Deuteranopia (no green cones) | #24457C | 0.037 |
| Tritanopia (no blue cones) | #2A4E59 | 0.086 |
| Achromatopsia (no color) | #474747 | 0.099 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #40417D
#40417D
oklch(40.6% 0.099 280.3)
- #544A00
#544A00
oklch(40.7% 0.085 100.5)
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 #40417D, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Slate Blue #483D8B ΔE 0.030
- Blueberry #464196 ΔE 0.043
- Cobalt #1E488F ΔE 0.049
- Twilight #4E518B ΔE 0.054
- Twilight Blue #0A437A ΔE 0.056
- Light Navy #155084 ΔE 0.056
- Dusk Blue #26538D ΔE 0.057
- Dusk #4E5481 ΔE 0.061
Use #40417D 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.