#42389B
Closest named color: Blueberry (#464196). oklch(41.3% 0.155 281.8), rgb(66, 56, 155).
Aa
White text reads best on this color (9.24:1).
About this color
#42389B is a dark, vivid purple. In OKLCH its lightness is 41%, its chroma 0.155 and its hue 282°. Its hue sits on the cool side of the wheel. The nearest named color is Blueberry (#464196), ΔE 0.025 away. White text reads best on it, at 9.24:1.
| Hue family | Purples |
| Lightness | dark (41%) |
| Chroma | vivid (0.155) |
| Temperature | cool |
| Nearest name | Blueberry (#464196) |
| Black text | 2.27:1 |
| White text | 9.24:1 |
Values
| HEX | #42389B |
| RGB | rgb(66, 56, 155) |
| HSL | hsl(246, 47%, 41%) |
| OKLCH | oklch(41.3% 0.155 281.8) |
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 #42389B | 9.24:1 | AAA | Lc -95.3 | Preferred for body text |
| Black text on #42389B | 2.27:1 | Fails | Lc 13.1 | Not readable |
| #42389B text on white | 9.24:1 | AAA | Lc 90.9 | Preferred for body text |
| #42389B text on black | 2.27:1 | Fails | Lc -11.4 | 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 800.
-
Step 50
50
#F4F5FE
oklch(97.2% 0.012 281.1)
-
Step 100
100
#E6E8FC
oklch(93.5% 0.027 281.3)
-
Step 200
200
#D3D6FA
oklch(88.5% 0.05 281.6)
-
Step 300
300
#B7BAFA
oklch(80.9% 0.09 282.1)
-
Step 400
400
#9393F8
oklch(70.6% 0.146 282)
-
Step 500
500
#7B75F4
oklch(63.1% 0.184 281.8)
-
Step 600
600
#6659E3
oklch(55.5% 0.202 281.8)
-
Step 700
700
#5548C5
oklch(49% 0.187 281.7)
-
Step 800
800 (this color)
#42389B
oklch(41.3% 0.155 281.8)
-
Step 900
900
#3A357F
oklch(37.8% 0.121 282)
-
Step 950
950
#21204A
oklch(27% 0.076 281.1)
#42389B 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) | #004B9E | 0.068 |
| Deuteranopia (no green cones) | #004499 | 0.063 |
| Tritanopia (no blue cones) | #145064 | 0.131 |
| Achromatopsia (no color) | #474747 | 0.156 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #42389B
#42389B
oklch(41.3% 0.155 281.8)
- #554C00
#554C00
oklch(41.3% 0.086 101.6)
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 #42389B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Blueberry #464196 ΔE 0.025
- Dark Slate Blue #483D8B ΔE 0.032
- Sapphire #2138AB ΔE 0.051
- Cobalt #1E488F ΔE 0.059
- Indigo Blue #3A18B1 ΔE 0.065
- Rebecca Purple #663399 ΔE 0.065
- Imperial Purple #480CA8 ΔE 0.066
- Chrysanthemum #560BAD ΔE 0.072
Use #42389B 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.