#40375C
Closest named color: Dark Grey Blue (#29465B). oklch(36.3% 0.063 294.2), rgb(64, 55, 92).
Aa
White text reads best on this color (10.94:1).
About this color
#40375C is a dark, muted purple. In OKLCH its lightness is 36%, its chroma 0.063 and its hue 294°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Dark Grey Blue (#29465B), ΔE 0.055 away. White text reads best on it, at 10.94:1.
| Hue family | Purples |
| Lightness | dark (36%) |
| Chroma | muted (0.063) |
| Temperature | in between |
| Nearest name | Dark Grey Blue (#29465B) |
| Black text | 1.91:1 |
| White text | 10.94:1 |
Values
| HEX | #40375C |
| RGB | rgb(64, 55, 92) |
| HSL | hsl(255, 25%, 29%) |
| OKLCH | oklch(36.3% 0.063 294.2) |
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 #40375C | 10.94:1 | AAA | Lc -99.1 | Preferred for body text |
| Black text on #40375C | 1.91:1 | Fails | Lc 8.6 | Not readable |
| #40375C text on white | 10.94:1 | AAA | Lc 95.3 | Preferred for body text |
| #40375C text on black | 1.91:1 | Fails | Lc -7.4 | 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
#F5F5F9
oklch(97.1% 0.005 286.3)
-
Step 100
100
#EAE8F2
oklch(93.5% 0.014 295.3)
-
Step 200
200
#DAD6E9
oklch(88.5% 0.026 295.5)
-
Step 300
300
#C2BBDD
oklch(80.9% 0.048 294.7)
-
Step 400
400
#A398CC
oklch(70.8% 0.076 294.1)
-
Step 500
500
#8D7EBF
oklch(63.2% 0.097 294)
-
Step 600
600
#7766AB
oklch(55.6% 0.106 294)
-
Step 700
700
#645593
oklch(49.2% 0.098 293.6)
-
Step 800
800
#524577
oklch(42.6% 0.082 294.6)
-
Step 900
900 (this color)
#40375C
oklch(36.3% 0.063 294.2)
-
Step 950
950
#282238
oklch(26.9% 0.041 296.1)
#40375C 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) | #2D3D5D | 0.033 |
| Deuteranopia (no green cones) | #2E3C5B | 0.031 |
| Tritanopia (no blue cones) | #3A3D45 | 0.051 |
| Achromatopsia (no color) | #3D3D3D | 0.063 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #40375C
#40375C
oklch(36.3% 0.063 294.2)
- #3D4217
#3D4217
oklch(36.4% 0.064 115.2)
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 #40375C, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Grey Blue #29465B ΔE 0.055
- Prussian Blue #1D3557 ΔE 0.055
- Onyx #343A40 ΔE 0.058
- Dark Blue Grey #1F3B4D ΔE 0.059
- Charcoal #264653 ΔE 0.063
- Charcoal Grey #3C4142 ΔE 0.063
- Gunmetal #293241 ΔE 0.064
- Space Cadet #2B2D42 ΔE 0.065
Use #40375C 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.