#553570
Closest named color: Dark Slate Blue (#483D8B). oklch(39.5% 0.102 307.4), rgb(85, 53, 112).
Aa
White text reads best on this color (9.86:1).
About this color
#553570 is a dark, moderately saturated purple. In OKLCH its lightness is 39%, its chroma 0.102 and its hue 307°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Dark Slate Blue (#483D8B), ΔE 0.052 away. White text reads best on it, at 9.86:1.
| Hue family | Purples |
| Lightness | dark (39%) |
| Chroma | moderately saturated (0.102) |
| Temperature | in between |
| Nearest name | Dark Slate Blue (#483D8B) |
| Black text | 2.12:1 |
| White text | 9.86:1 |
Values
| HEX | #553570 |
| RGB | rgb(85, 53, 112) |
| HSL | hsl(273, 36%, 32%) |
| OKLCH | oklch(39.5% 0.102 307.4) |
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 #553570 | 9.86:1 | AAA | Lc -96.8 | Preferred for body text |
| Black text on #553570 | 2.12:1 | Fails | Lc 11.3 | Not readable |
| #553570 text on white | 9.86:1 | AAA | Lc 92.7 | Preferred for body text |
| #553570 text on black | 2.12:1 | Fails | Lc -9.8 | 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
#F7F4FB
oklch(97.1% 0.01 305.4)
-
Step 100
100
#EEE6F6
oklch(93.6% 0.023 308.2)
-
Step 200
200
#E1D2EF
oklch(88.5% 0.042 308.6)
-
Step 300
300
#CEB4E7
oklch(80.9% 0.076 307.8)
-
Step 400
400
#B58BDB
oklch(70.6% 0.122 307.6)
-
Step 500
500
#A36CD2
oklch(63.1% 0.157 307.4)
-
Step 600
600
#8E52BF
oklch(55.7% 0.169 307.2)
-
Step 700
700
#7941A4
oklch(49% 0.158 307.7)
-
Step 800
800
#623785
oklch(42.7% 0.129 307.2)
-
Step 900
900 (this color)
#553570
oklch(39.5% 0.102 307.4)
-
Step 950
950
#2F1D3F
oklch(27.1% 0.065 307)
#553570 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) | #254272 | 0.079 |
| Deuteranopia (no green cones) | #2E446F | 0.072 |
| Tritanopia (no blue cones) | #513F4D | 0.073 |
| Achromatopsia (no color) | #434343 | 0.102 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #553570
#553570
oklch(39.5% 0.102 307.4)
- #375001
#375001
oklch(39.6% 0.102 127.5)
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 #553570, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Slate Blue #483D8B ΔE 0.052
- Blueberry #464196 ΔE 0.070
- Rebecca Purple #663399 ΔE 0.075
- Twilight #4E518B ΔE 0.080
- Grape Purple #5D1451 ΔE 0.081
- Dusk #4E5481 ΔE 0.084
- Dark Grey Blue #29465B ΔE 0.094
- Dusty Grape #545775 ΔE 0.095
Use #553570 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.