#40379B
Closest named color: Blueberry (#464196). oklch(40.9% 0.157 281), rgb(64, 55, 155).
Aa
White text reads best on this color (9.38:1).
About this color
#40379B is a dark, vivid purple. In OKLCH its lightness is 41%, its chroma 0.157 and its hue 281°. Its hue sits on the cool side of the wheel. The nearest named color is Blueberry (#464196), ΔE 0.029 away. White text reads best on it, at 9.38:1.
| Hue family | Purples |
| Lightness | dark (41%) |
| Chroma | vivid (0.157) |
| Temperature | cool |
| Nearest name | Blueberry (#464196) |
| Black text | 2.23:1 |
| White text | 9.38:1 |
Values
| HEX | #40379B |
| RGB | rgb(64, 55, 155) |
| HSL | hsl(245, 48%, 41%) |
| OKLCH | oklch(40.9% 0.157 281) |
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 #40379B | 9.38:1 | AAA | Lc -95.6 | Preferred for body text |
| Black text on #40379B | 2.23:1 | Fails | Lc 12.8 | Not readable |
| #40379B text on white | 9.38:1 | AAA | Lc 91.2 | Preferred for body text |
| #40379B text on black | 2.23:1 | Fails | Lc -11.1 | 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
#F4F5FE
oklch(97.2% 0.012 281.1)
-
Step 100
100
#E6E8FC
oklch(93.5% 0.027 281.3)
-
Step 200
200
#D2D6FB
oklch(88.5% 0.051 280.4)
-
Step 300
300
#B6BAFB
oklch(80.9% 0.092 281.4)
-
Step 400
400
#9194F9
oklch(70.7% 0.146 280.7)
-
Step 500
500
#7975F6
oklch(63.1% 0.187 281)
-
Step 600
600
#645AE5
oklch(55.7% 0.203 280.7)
-
Step 700
700
#5448C7
oklch(49.1% 0.19 281.1)
-
Step 800
800 (this color)
#40379B
oklch(40.9% 0.157 281)
-
Step 900
900
#393580
oklch(37.8% 0.123 281.2)
-
Step 950
950
#21204B
oklch(27.1% 0.077 280.9)
#40379B 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) | #004A9E | 0.066 |
| Deuteranopia (no green cones) | #004399 | 0.061 |
| Tritanopia (no blue cones) | #095064 | 0.133 |
| Achromatopsia (no color) | #464646 | 0.157 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #40379B
#40379B
oklch(40.9% 0.157 281)
- #554B00
#554B00
oklch(41% 0.085 100.6)
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 #40379B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Blueberry #464196 ΔE 0.029
- Dark Slate Blue #483D8B ΔE 0.034
- Sapphire #2138AB ΔE 0.048
- Cobalt #1E488F ΔE 0.059
- Indigo Blue #3A18B1 ΔE 0.062
- Imperial Purple #480CA8 ΔE 0.064
- Rebecca Purple #663399 ΔE 0.069
- Chrysanthemum #560BAD ΔE 0.072
Use #40379B 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.