#42366F
Closest named color: Dark Slate Blue (#483D8B). oklch(37.5% 0.095 290.8), rgb(66, 54, 111).
Aa
White text reads best on this color (10.55:1).
About this color
#42366F is a dark, moderately saturated purple. In OKLCH its lightness is 38%, its chroma 0.095 and its hue 291°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Dark Slate Blue (#483D8B), ΔE 0.050 away. White text reads best on it, at 10.55:1.
| Hue family | Purples |
| Lightness | dark (38%) |
| Chroma | moderately saturated (0.095) |
| Temperature | in between |
| Nearest name | Dark Slate Blue (#483D8B) |
| Black text | 1.98:1 |
| White text | 10.55:1 |
Values
| HEX | #42366F |
| RGB | rgb(66, 54, 111) |
| HSL | hsl(253, 35%, 32%) |
| OKLCH | oklch(37.5% 0.095 290.8) |
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 #42366F | 10.55:1 | AAA | Lc -98.3 | Preferred for body text |
| Black text on #42366F | 1.98:1 | Fails | Lc 9.6 | Not readable |
| #42366F text on white | 10.55:1 | AAA | Lc 94.3 | Preferred for body text |
| #42366F text on black | 1.98:1 | Fails | Lc -8.2 | 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
#F5F4FC
oklch(97% 0.011 292)
-
Step 100
100
#E9E8F7
oklch(93.6% 0.02 289.1)
-
Step 200
200
#D8D5F2
oklch(88.4% 0.04 290.3)
-
Step 300
300
#C0B9EC
oklch(80.9% 0.072 291)
-
Step 400
400
#A194E2
oklch(70.8% 0.113 290.9)
-
Step 500
500
#8B77DA
oklch(63.1% 0.146 290.9)
-
Step 600
600
#765EC7
oklch(55.7% 0.157 290.9)
-
Step 700
700
#634CAC
oklch(49% 0.147 291)
-
Step 800
800
#513F8C
oklch(42.7% 0.123 291.1)
-
Step 900
900 (this color)
#42366F
oklch(37.5% 0.095 290.8)
-
Step 950
950
#272041
oklch(26.9% 0.06 291.6)
#42366F 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) | #204071 | 0.052 |
| Deuteranopia (no green cones) | #213E6E | 0.050 |
| Tritanopia (no blue cones) | #36414D | 0.077 |
| Achromatopsia (no color) | #3F3F3F | 0.095 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #42366F
#42366F
oklch(37.5% 0.095 290.8)
- #434500
#434500
oklch(37.6% 0.083 111.6)
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 #42366F, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Slate Blue #483D8B ΔE 0.050
- Twilight Blue #0A437A ΔE 0.068
- Blueberry #464196 ΔE 0.069
- Prussian Blue #1D3557 ΔE 0.072
- Dark Grey Blue #29465B ΔE 0.073
- Marine Blue #01386A ΔE 0.074
- Cobalt #1E488F ΔE 0.077
- Dark Blue Grey #1F3B4D ΔE 0.084
Use #42366F 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.