#42297A
Closest named color: Dark Slate Blue (#483D8B). oklch(36% 0.131 292.8), rgb(66, 41, 122).
Aa
White text reads best on this color (11.47:1).
About this color
#42297A is a dark, moderately saturated purple. In OKLCH its lightness is 36%, its chroma 0.131 and its hue 293°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Dark Slate Blue (#483D8B), ΔE 0.057 away. White text reads best on it, at 11.47:1.
| Hue family | Purples |
| Lightness | dark (36%) |
| Chroma | moderately saturated (0.131) |
| Temperature | in between |
| Nearest name | Dark Slate Blue (#483D8B) |
| Black text | 1.82:1 |
| White text | 11.47:1 |
Values
| HEX | #42297A |
| RGB | rgb(66, 41, 122) |
| HSL | hsl(259, 50%, 32%) |
| OKLCH | oklch(36% 0.131 292.8) |
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 #42297A | 11.47:1 | AAA | Lc -99.8 | Preferred for body text |
| Black text on #42297A | 1.82:1 | Fails | Lc 7.9 | Not readable |
| #42297A text on white | 11.47:1 | AAA | Lc 96.0 | Preferred for body text |
| #42297A text on black | 1.82:1 | 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
#F5F4FE
oklch(97.1% 0.013 290.8)
-
Step 100
100
#EAE7FC
oklch(93.7% 0.028 292.4)
-
Step 200
200
#DAD3FB
oklch(88.5% 0.055 293.3)
-
Step 300
300
#C2B5FB
oklch(80.9% 0.098 292.6)
-
Step 400
400
#A58BF9
oklch(70.7% 0.158 292.8)
-
Step 500
500
#9169F5
oklch(63% 0.201 292.9)
-
Step 600
600
#7D4BE4
oklch(55.5% 0.219 292.9)
-
Step 700
700
#6A3BC6
oklch(49.1% 0.202 292.9)
-
Step 800
800
#5632A0
oklch(42.6% 0.168 292.9)
-
Step 900
900 (this color)
#42297A
oklch(36% 0.131 292.8)
-
Step 950
950
#291C4B
oklch(27.1% 0.084 292.7)
#42297A 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) | #003A7D | 0.080 |
| Deuteranopia (no green cones) | #003878 | 0.080 |
| Tritanopia (no blue cones) | #323C4D | 0.105 |
| Achromatopsia (no color) | #393939 | 0.132 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #42297A
#42297A
oklch(36% 0.131 292.8)
- #3E4100
#3E4100
oklch(36% 0.08 112.7)
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 #42297A, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Slate Blue #483D8B ΔE 0.057
- Indigo #4B0082 ΔE 0.058
- Royal Purple #4B006E ΔE 0.066
- Blueberry #464196 ΔE 0.073
- Imperial Purple #480CA8 ΔE 0.083
- Midnight Blue #191970 ΔE 0.087
- Twilight Blue #0A437A ΔE 0.087
- Marine Blue #01386A ΔE 0.088
Use #42297A 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.