#40425B
Closest named color: Dark Grey Blue (#29465B). oklch(38.8% 0.042 280.7), rgb(64, 66, 91).
Aa
White text reads best on this color (9.77:1).
About this color
#40425B is a dark, muted purple. In OKLCH its lightness is 39%, its chroma 0.042 and its hue 281°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Grey Blue (#29465B), ΔE 0.033 away. White text reads best on it, at 9.77:1.
| Hue family | Purples |
| Lightness | dark (39%) |
| Chroma | muted (0.042) |
| Temperature | cool |
| Nearest name | Dark Grey Blue (#29465B) |
| Black text | 2.14:1 |
| White text | 9.77:1 |
Values
| HEX | #40425B |
| RGB | rgb(64, 66, 91) |
| HSL | hsl(236, 17%, 30%) |
| OKLCH | oklch(38.8% 0.042 280.7) |
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 #40425B | 9.77:1 | AAA | Lc -96.8 | Preferred for body text |
| Black text on #40425B | 2.14:1 | Fails | Lc 11.3 | Not readable |
| #40425B text on white | 9.77:1 | AAA | Lc 92.7 | Preferred for body text |
| #40425B text on black | 2.14:1 | Fails | Lc -9.8 | 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
#F5F5F8
oklch(97.1% 0.004 286.3)
-
Step 100
100
#E8E9F0
oklch(93.5% 0.009 279.7)
-
Step 200
200
#D7D8E5
oklch(88.5% 0.018 282.5)
-
Step 300
300
#BCBFD5
oklch(80.9% 0.031 279.5)
-
Step 400
400
#9A9EC0
oklch(70.8% 0.05 279.8)
-
Step 500
500
#8285B1
oklch(63.1% 0.066 281.3)
-
Step 600
600
#6B6F9C
oklch(55.6% 0.07 279.9)
-
Step 700
700
#5A5C86
oklch(49.1% 0.067 281.5)
-
Step 800
800
#494C6C
oklch(42.7% 0.053 279.8)
-
Step 900
900 (this color)
#40425B
oklch(38.8% 0.042 280.7)
-
Step 950
950
#242533
oklch(27% 0.026 281.3)
#40425B 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) | #3B455C | 0.011 |
| Deuteranopia (no green cones) | #3A435A | 0.010 |
| Tritanopia (no blue cones) | #39474B | 0.038 |
| Achromatopsia (no color) | #444444 | 0.042 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #40425B
#40425B
oklch(38.8% 0.042 280.7)
- #49452A
#49452A
oklch(38.7% 0.042 100.9)
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 #40425B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Grey Blue #29465B ΔE 0.033
- Charcoal #264653 ΔE 0.041
- Charcoal Grey #3C4142 ΔE 0.044
- Onyx #343A40 ΔE 0.053
- Dark Slate Gray #2F4F4F ΔE 0.056
- Dark Blue Grey #1F3B4D ΔE 0.059
- Prussian Blue #1D3557 ΔE 0.069
- Dark Teal #014D4E ΔE 0.074
Use #40425B 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.