#42405A
Closest named color: Dark Grey Blue (#29465B). oklch(38.5% 0.044 287.7), rgb(66, 64, 90).
Aa
White text reads best on this color (9.94:1).
About this color
#42405A is a dark, muted purple. In OKLCH its lightness is 38%, its chroma 0.044 and its hue 288°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Grey Blue (#29465B), ΔE 0.038 away. White text reads best on it, at 9.94:1.
| Hue family | Purples |
| Lightness | dark (38%) |
| Chroma | muted (0.044) |
| Temperature | cool |
| Nearest name | Dark Grey Blue (#29465B) |
| Black text | 2.11:1 |
| White text | 9.94:1 |
Values
| HEX | #42405A |
| RGB | rgb(66, 64, 90) |
| HSL | hsl(245, 17%, 30%) |
| OKLCH | oklch(38.5% 0.044 287.7) |
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 #42405A | 9.94:1 | AAA | Lc -97.2 | Preferred for body text |
| Black text on #42405A | 2.11:1 | Fails | Lc 10.9 | Not readable |
| #42405A text on white | 9.94:1 | AAA | Lc 93.1 | Preferred for body text |
| #42405A text on black | 2.11:1 | Fails | Lc -9.4 | 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
#F5F5F8
oklch(97.1% 0.004 286.3)
-
Step 100
100
#E9E9F0
oklch(93.6% 0.009 286.2)
-
Step 200
200
#D8D7E5
oklch(88.4% 0.019 289.3)
-
Step 300
300
#BFBED5
oklch(81% 0.032 287.7)
-
Step 400
400
#9E9CC0
oklch(70.7% 0.052 287.5)
-
Step 500
500
#8783B1
oklch(63.1% 0.069 288.2)
-
Step 600
600
#716D9C
oklch(55.7% 0.072 287.7)
-
Step 700
700
#5E5B85
oklch(49.1% 0.067 286.9)
-
Step 800
800
#4D4A6C
oklch(42.6% 0.056 287.8)
-
Step 900
900 (this color)
#42405A
oklch(38.5% 0.044 287.7)
-
Step 950
950
#252433
oklch(26.8% 0.028 287.4)
#42405A 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) | #39435B | 0.016 |
| Deuteranopia (no green cones) | #394259 | 0.015 |
| Tritanopia (no blue cones) | #3D4449 | 0.037 |
| Achromatopsia (no color) | #434343 | 0.044 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #42405A
#42405A
oklch(38.5% 0.044 287.7)
- #464529
#464529
oklch(38.4% 0.044 106.5)
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 #42405A, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Grey Blue #29465B ΔE 0.038
- Charcoal Grey #3C4142 ΔE 0.045
- Charcoal #264653 ΔE 0.046
- Onyx #343A40 ΔE 0.052
- Dark Blue Grey #1F3B4D ΔE 0.059
- Dark Slate Gray #2F4F4F ΔE 0.062
- Prussian Blue #1D3557 ΔE 0.068
- Gunmetal #293241 ΔE 0.073
Use #42405A 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.