#42306B
Closest named color: Dark Slate Blue (#483D8B). oklch(36.1% 0.099 295), rgb(66, 48, 107).
Aa
White text reads best on this color (11.24:1).
About this color
#42306B is a dark, moderately saturated purple. In OKLCH its lightness is 36%, its chroma 0.099 and its hue 295°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Dark Slate Blue (#483D8B), ΔE 0.062 away. White text reads best on it, at 11.24:1.
| Hue family | Purples |
| Lightness | dark (36%) |
| Chroma | moderately saturated (0.099) |
| Temperature | in between |
| Nearest name | Dark Slate Blue (#483D8B) |
| Black text | 1.86:1 |
| White text | 11.24:1 |
Values
| HEX | #42306B |
| RGB | rgb(66, 48, 107) |
| HSL | hsl(258, 38%, 30%) |
| OKLCH | oklch(36.1% 0.099 295) |
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 #42306B | 11.24:1 | AAA | Lc -99.6 | Preferred for body text |
| Black text on #42306B | 1.86:1 | Fails | Lc 8.1 | Not readable |
| #42306B text on white | 11.24:1 | AAA | Lc 95.8 | Preferred for body text |
| #42306B text on black | 1.86:1 | 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
#F6F4FC
oklch(97.1% 0.011 297.6)
-
Step 100
100
#EAE7F7
oklch(93.5% 0.022 294.6)
-
Step 200
200
#DAD4F2
oklch(88.4% 0.041 294.7)
-
Step 300
300
#C3B8EC
oklch(80.9% 0.073 294.4)
-
Step 400
400
#A691E3
oklch(70.7% 0.119 294.9)
-
Step 500
500
#9173DA
oklch(63% 0.152 295.1)
-
Step 600
600
#7C5AC8
oklch(55.6% 0.165 294.7)
-
Step 700
700
#6949AD
oklch(49.1% 0.153 294.9)
-
Step 800
800
#563C8C
oklch(42.7% 0.128 295.5)
-
Step 900
900 (this color)
#42306B
oklch(36.1% 0.099 295)
-
Step 950
950
#291F42
oklch(27% 0.064 294.9)
#42306B 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) | #183B6D | 0.063 |
| Deuteranopia (no green cones) | #1C3A6A | 0.059 |
| Tritanopia (no blue cones) | #383C48 | 0.080 |
| Achromatopsia (no color) | #3B3B3B | 0.099 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #42306B
#42306B
oklch(36.1% 0.099 295)
- #3C4200
#3C4200
oklch(36.1% 0.082 115.4)
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 #42306B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Slate Blue #483D8B ΔE 0.062
- Prussian Blue #1D3557 ΔE 0.070
- Marine Blue #01386A ΔE 0.076
- Twilight Blue #0A437A ΔE 0.078
- Blueberry #464196 ΔE 0.081
- Royal Purple #4B006E ΔE 0.082
- Dark Grey Blue #29465B ΔE 0.083
- Space Cadet #2B2D42 ΔE 0.084
Use #42306B 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.