#553A67
Closest named color: Dark Slate Blue (#483D8B). oklch(39.9% 0.08 310.8), rgb(85, 58, 103).
Aa
White text reads best on this color (9.60:1).
About this color
#553A67 is a dark, moderately saturated purple. In OKLCH its lightness is 40%, its chroma 0.080 and its hue 311°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Dark Slate Blue (#483D8B), ΔE 0.064 away. White text reads best on it, at 9.60:1.
| Hue family | Purples |
| Lightness | dark (40%) |
| Chroma | moderately saturated (0.080) |
| Temperature | in between |
| Nearest name | Dark Slate Blue (#483D8B) |
| Black text | 2.18:1 |
| White text | 9.60:1 |
Values
| HEX | #553A67 |
| RGB | rgb(85, 58, 103) |
| HSL | hsl(276, 28%, 32%) |
| OKLCH | oklch(39.9% 0.08 310.8) |
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 #553A67 | 9.60:1 | AAA | Lc -96.4 | Preferred for body text |
| Black text on #553A67 | 2.18:1 | Fails | Lc 11.8 | Not readable |
| #553A67 text on white | 9.60:1 | AAA | Lc 92.1 | Preferred for body text |
| #553A67 text on black | 2.18:1 | Fails | Lc -10.3 | 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 900.
-
Step 50
50
#F7F4FA
oklch(97.1% 0.009 308.4)
-
Step 100
100
#EDE7F3
oklch(93.6% 0.017 308.3)
-
Step 200
200
#E0D3EA
oklch(88.4% 0.034 310.7)
-
Step 300
300
#CDB6DE
oklch(80.9% 0.061 310.8)
-
Step 400
400
#B490CD
oklch(70.8% 0.095 310.9)
-
Step 500
500
#A173C0
oklch(63.1% 0.122 310.7)
-
Step 600
600
#8C5AAC
oklch(55.6% 0.133 310.9)
-
Step 700
700
#774994
oklch(49.1% 0.125 310.9)
-
Step 800
800
#613D78
oklch(42.8% 0.102 310.9)
-
Step 900
900 (this color)
#553A67
oklch(39.9% 0.08 310.8)
-
Step 950
950
#2E1F39
oklch(27% 0.051 309.8)
#553A67 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) | #314469 | 0.062 |
| Deuteranopia (no green cones) | #374566 | 0.057 |
| Tritanopia (no blue cones) | #53414B | 0.058 |
| Achromatopsia (no color) | #454545 | 0.080 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #553A67
#553A67
oklch(39.9% 0.08 310.8)
- #38501E
#38501E
oklch(39.9% 0.081 130.7)
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 #553A67, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Slate Blue #483D8B ΔE 0.064
- Purple Brown #673A3F ΔE 0.076
- Dusk #4E5481 ΔE 0.076
- Twilight #4E518B ΔE 0.078
- Dark Grey Blue #29465B ΔE 0.080
- Blueberry #464196 ΔE 0.081
- Dusty Grape #545775 ΔE 0.081
- Brownish Purple #76424E ΔE 0.085
Use #553A67 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.