#553070
Closest named color: Dark Slate Blue (#483D8B). oklch(38.6% 0.11 308.8), rgb(85, 48, 112).
Aa
White text reads best on this color (10.27:1).
About this color
#553070 is a dark, moderately saturated purple. In OKLCH its lightness is 39%, its chroma 0.110 and its hue 309°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Dark Slate Blue (#483D8B), ΔE 0.056 away. White text reads best on it, at 10.27:1.
| Hue family | Purples |
| Lightness | dark (39%) |
| Chroma | moderately saturated (0.110) |
| Temperature | in between |
| Nearest name | Dark Slate Blue (#483D8B) |
| Black text | 2.04:1 |
| White text | 10.27:1 |
Values
| HEX | #553070 |
| RGB | rgb(85, 48, 112) |
| HSL | hsl(275, 40%, 31%) |
| OKLCH | oklch(38.6% 0.11 308.8) |
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 #553070 | 10.27:1 | AAA | Lc -97.6 | Preferred for body text |
| Black text on #553070 | 2.04:1 | Fails | Lc 10.4 | Not readable |
| #553070 text on white | 10.27:1 | AAA | Lc 93.6 | Preferred for body text |
| #553070 text on black | 2.04:1 | Fails | Lc -9.0 | 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
#F7F4FB
oklch(97.1% 0.01 305.4)
-
Step 100
100
#EEE6F6
oklch(93.6% 0.023 308.2)
-
Step 200
200
#E2D1F1
oklch(88.4% 0.047 309.2)
-
Step 300
300
#D0B2EA
oklch(80.8% 0.084 308.9)
-
Step 400
400
#B888DF
oklch(70.6% 0.133 308.7)
-
Step 500
500
#A768D6
oklch(63.1% 0.169 308.8)
-
Step 600
600
#924CC3
oklch(55.6% 0.184 308.7)
-
Step 700
700
#7D3CA9
oklch(49.2% 0.172 308.8)
-
Step 800
800
#653389
oklch(42.8% 0.141 308.4)
-
Step 900
900 (this color)
#553070
oklch(38.6% 0.11 308.8)
-
Step 950
950
#301B40
oklch(26.9% 0.07 308.6)
#553070 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) | #1C3F72 | 0.091 |
| Deuteranopia (no green cones) | #29416E | 0.081 |
| Tritanopia (no blue cones) | #513B4B | 0.077 |
| Achromatopsia (no color) | #414141 | 0.111 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #553070
#553070
oklch(38.6% 0.11 308.8)
- #334E00
#334E00
oklch(38.7% 0.102 128.8)
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 #553070, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Slate Blue #483D8B ΔE 0.056
- Grape Purple #5D1451 ΔE 0.073
- Rebecca Purple #663399 ΔE 0.075
- Blueberry #464196 ΔE 0.075
- Royal Purple #4B006E ΔE 0.084
- Indigo #4B0082 ΔE 0.085
- Rich Purple #720058 ΔE 0.091
- Twilight #4E518B ΔE 0.091
Use #553070 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.