#55427D
Closest named color: Dark Slate Blue (#483D8B). oklch(42.7% 0.097 297), rgb(85, 66, 125).
Aa
White text reads best on this color (8.53:1).
About this color
#55427D is a dark, moderately saturated purple. In OKLCH its lightness is 43%, its chroma 0.097 and its hue 297°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Dark Slate Blue (#483D8B), ΔE 0.037 away. White text reads best on it, at 8.53:1.
| Hue family | Purples |
| Lightness | dark (43%) |
| Chroma | moderately saturated (0.097) |
| Temperature | in between |
| Nearest name | Dark Slate Blue (#483D8B) |
| Black text | 2.46:1 |
| White text | 8.53:1 |
Values
| HEX | #55427D |
| RGB | rgb(85, 66, 125) |
| HSL | hsl(259, 31%, 37%) |
| OKLCH | oklch(42.7% 0.097 297) |
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 #55427D | 8.53:1 | AAA | Lc -93.8 | Preferred for body text |
| Black text on #55427D | 2.46:1 | Fails | Lc 14.8 | Not readable |
| #55427D text on white | 8.53:1 | AAA | Lc 89.2 | Fine for body text |
| #55427D text on black | 2.46:1 | Fails | Lc -13.0 | 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 800.
-
Step 50
50
#F6F4FA
oklch(97% 0.008 301.4)
-
Step 100
100
#EBE8F4
oklch(93.7% 0.016 297.5)
-
Step 200
200
#DBD5EC
oklch(88.5% 0.032 297.7)
-
Step 300
300
#C4BAE1
oklch(81% 0.055 296.9)
-
Step 400
400
#A695D2
oklch(70.7% 0.089 296.8)
-
Step 500
500
#917AC7
oklch(63.2% 0.115 296.7)
-
Step 600
600
#7C61B3
oklch(55.6% 0.126 297.3)
-
Step 700
700
#68509A
oklch(49% 0.117 296.8)
-
Step 800
800 (this color)
#55427D
oklch(42.7% 0.097 297)
-
Step 900
900
#463864
oklch(37.6% 0.075 297.3)
-
Step 950
950
#29213B
oklch(27% 0.048 297.2)
#55427D 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) | #304D7F | 0.059 |
| Deuteranopia (no green cones) | #334C7C | 0.056 |
| Tritanopia (no blue cones) | #4C4D59 | 0.078 |
| Achromatopsia (no color) | #4C4C4C | 0.097 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #55427D
#55427D
oklch(42.7% 0.097 297)
- #4C5503
#4C5503
oklch(42.7% 0.097 116.6)
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 #55427D, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Slate Blue #483D8B ΔE 0.037
- Twilight #4E518B ΔE 0.043
- Blueberry #464196 ΔE 0.049
- Dusk #4E5481 ΔE 0.050
- Dusty Grape #545775 ΔE 0.065
- Rebecca Purple #663399 ΔE 0.067
- Dusk Blue #26538D ΔE 0.074
- Denim Blue #3B5B92 ΔE 0.076
Use #55427D 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.