#55297E
Closest named color: Dark Slate Blue (#483D8B). oklch(38.5% 0.139 304.4), rgb(85, 41, 126).
Aa
White text reads best on this color (10.47:1).
About this color
#55297E is a dark, moderately saturated purple. In OKLCH its lightness is 39%, its chroma 0.139 and its hue 304°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Dark Slate Blue (#483D8B), ΔE 0.053 away. White text reads best on it, at 10.47:1.
| Hue family | Purples |
| Lightness | dark (39%) |
| Chroma | moderately saturated (0.139) |
| Temperature | in between |
| Nearest name | Dark Slate Blue (#483D8B) |
| Black text | 2.00:1 |
| White text | 10.47:1 |
Values
| HEX | #55297E |
| RGB | rgb(85, 41, 126) |
| HSL | hsl(271, 51%, 33%) |
| OKLCH | oklch(38.5% 0.139 304.4) |
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 #55297E | 10.47:1 | AAA | Lc -97.8 | Preferred for body text |
| Black text on #55297E | 2.00:1 | Fails | Lc 10.1 | Not readable |
| #55297E text on white | 10.47:1 | AAA | Lc 93.8 | Preferred for body text |
| #55297E text on black | 2.00:1 | Fails | Lc -8.8 | 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
#F7F3FD
oklch(97% 0.014 304.1)
-
Step 100
100
#EEE5FB
oklch(93.5% 0.031 304.3)
-
Step 200
200
#E1D0F9
oklch(88.4% 0.058 304)
-
Step 300
300
#CFB0F7
oklch(80.9% 0.103 304.2)
-
Step 400
400
#B883F3
oklch(70.7% 0.165 304.3)
-
Step 500
500
#A75DEF
oklch(63.1% 0.213 304.3)
-
Step 600
600
#933CDD
oklch(55.6% 0.231 304.4)
-
Step 700
700
#7E2CC0
oklch(49.2% 0.215 304.6)
-
Step 800
800
#66279B
oklch(42.7% 0.178 304.5)
-
Step 900
900 (this color)
#55297E
oklch(38.5% 0.139 304.4)
-
Step 950
950
#301848
oklch(26.9% 0.087 304.2)
#55297E 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) | #003E81 | 0.110 |
| Deuteranopia (no green cones) | #0F3F7C | 0.106 |
| Tritanopia (no blue cones) | #4D3B4F | 0.101 |
| Achromatopsia (no color) | #3F3F3F | 0.140 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #55297E
#55297E
oklch(38.5% 0.139 304.4)
- #394C00
#394C00
oklch(38.6% 0.096 124.4)
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 #55297E, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Slate Blue #483D8B ΔE 0.053
- Rebecca Purple #663399 ΔE 0.059
- Indigo #4B0082 ΔE 0.062
- Blueberry #464196 ΔE 0.069
- Royal Purple #4B006E ΔE 0.071
- Chrysanthemum #560BAD ΔE 0.084
- Grape Purple #5D1451 ΔE 0.085
- Imperial Purple #480CA8 ΔE 0.085
Use #55297E 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.