#553F7B
Closest named color: Dark Slate Blue (#483D8B). oklch(42% 0.099 299), rgb(85, 63, 123).
Aa
White text reads best on this color (8.81:1).
About this color
#553F7B is a dark, moderately saturated purple. In OKLCH its lightness is 42%, its chroma 0.099 and its hue 299°. 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 8.81:1.
| Hue family | Purples |
| Lightness | dark (42%) |
| Chroma | moderately saturated (0.099) |
| Temperature | in between |
| Nearest name | Dark Slate Blue (#483D8B) |
| Black text | 2.38:1 |
| White text | 8.81:1 |
Values
| HEX | #553F7B |
| RGB | rgb(85, 63, 123) |
| HSL | hsl(262, 32%, 36%) |
| OKLCH | oklch(42% 0.099 299) |
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 #553F7B | 8.81:1 | AAA | Lc -94.5 | Preferred for body text |
| Black text on #553F7B | 2.38:1 | Fails | Lc 14.0 | Not readable |
| #553F7B text on white | 8.81:1 | AAA | Lc 90.0 | Fine for body text |
| #553F7B text on black | 2.38:1 | Fails | Lc -12.3 | 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
#DCD5EC
oklch(88.6% 0.032 299.6)
-
Step 300
300
#C5B9E1
oklch(80.9% 0.057 298.8)
-
Step 400
400
#A894D3
oklch(70.7% 0.093 298.6)
-
Step 500
500
#9478C7
oklch(63.1% 0.119 299.3)
-
Step 600
600
#7E60B3
oklch(55.6% 0.128 298.9)
-
Step 700
700
#6B4F9A
oklch(49.1% 0.119 299.2)
-
Step 800
800 (this color)
#553F7B
oklch(42% 0.099 299)
-
Step 900
900
#473765
oklch(37.6% 0.078 298.6)
-
Step 950
950
#2A213B
oklch(27.1% 0.048 299.1)
#553F7B 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) | #2C4A7D | 0.064 |
| Deuteranopia (no green cones) | #314A7A | 0.060 |
| Tritanopia (no blue cones) | #4D4A57 | 0.077 |
| Achromatopsia (no color) | #4A4A4A | 0.100 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #553F7B
#553F7B
oklch(42% 0.099 299)
- #485400
#485400
oklch(42% 0.099 118.8)
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 #553F7B, 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
- Blueberry #464196 ΔE 0.051
- Twilight #4E518B ΔE 0.051
- Dusk #4E5481 ΔE 0.058
- Rebecca Purple #663399 ΔE 0.065
- Dusty Grape #545775 ΔE 0.072
- Dusk Blue #26538D ΔE 0.079
- Cobalt #1E488F ΔE 0.080
Use #553F7B 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.