#40394D
Closest named color: Onyx (#343A40). oklch(36% 0.035 300.7), rgb(64, 57, 77).
Aa
White text reads best on this color (10.99:1).
About this color
#40394D is a dark, muted purple. In OKLCH its lightness is 36%, its chroma 0.035 and its hue 301°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Onyx (#343A40), ΔE 0.033 away. White text reads best on it, at 10.99:1.
| Hue family | Purples |
| Lightness | dark (36%) |
| Chroma | muted (0.035) |
| Temperature | in between |
| Nearest name | Onyx (#343A40) |
| Black text | 1.91:1 |
| White text | 10.99:1 |
Values
| HEX | #40394D |
| RGB | rgb(64, 57, 77) |
| HSL | hsl(261, 15%, 26%) |
| OKLCH | oklch(36% 0.035 300.7) |
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 #40394D | 10.99:1 | AAA | Lc -99.3 | Preferred for body text |
| Black text on #40394D | 1.91:1 | Fails | Lc 8.5 | Not readable |
| #40394D text on white | 10.99:1 | AAA | Lc 95.4 | Preferred for body text |
| #40394D text on black | 1.91:1 | Fails | Lc 0.0 | 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
#F6F5F7
oklch(97.1% 0.003 308.4)
-
Step 100
100
#EAE9EE
oklch(93.6% 0.007 295.4)
-
Step 200
200
#DAD7E2
oklch(88.5% 0.015 298.5)
-
Step 300
300
#C3BDCF
oklch(80.9% 0.026 301)
-
Step 400
400
#A59BB7
oklch(70.7% 0.042 301.6)
-
Step 500
500
#8F82A6
oklch(63.1% 0.055 301.3)
-
Step 600
600
#796C91
oklch(55.7% 0.058 300.6)
-
Step 700
700
#665A7B
oklch(49.2% 0.054 301.1)
-
Step 800
800
#534964
oklch(42.6% 0.046 301.4)
-
Step 900
900 (this color)
#40394D
oklch(36% 0.035 300.7)
-
Step 950
950
#282430
oklch(27% 0.023 300.1)
#40394D 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) | #353C4E | 0.019 |
| Deuteranopia (no green cones) | #363C4C | 0.019 |
| Tritanopia (no blue cones) | #3E3C40 | 0.028 |
| Achromatopsia (no color) | #3C3C3C | 0.035 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #40394D
#40394D
oklch(36% 0.035 300.7)
- #3A402B
#3A402B
oklch(35.9% 0.035 121.1)
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 #40394D, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Onyx #343A40 ΔE 0.033
- Charcoal Grey #3C4142 ΔE 0.037
- Dark Blue Grey #1F3B4D ΔE 0.048
- Dark Grey Blue #29465B ΔE 0.049
- Gunmetal #293241 ΔE 0.050
- Charcoal #264653 ΔE 0.051
- Space Cadet #2B2D42 ΔE 0.057
- Prussian Blue #1D3557 ΔE 0.058
Use #40394D 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.