#553F7F
Closest named color: Dark Slate Blue (#483D8B). oklch(42.3% 0.105 297.6), rgb(85, 63, 127).
Aa
White text reads best on this color (8.73:1).
About this color
#553F7F is a dark, moderately saturated purple. In OKLCH its lightness is 42%, its chroma 0.105 and its hue 298°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Dark Slate Blue (#483D8B), ΔE 0.032 away. White text reads best on it, at 8.73:1.
| Hue family | Purples |
| Lightness | dark (42%) |
| Chroma | moderately saturated (0.105) |
| Temperature | in between |
| Nearest name | Dark Slate Blue (#483D8B) |
| Black text | 2.40:1 |
| White text | 8.73:1 |
Values
| HEX | #553F7F |
| RGB | rgb(85, 63, 127) |
| HSL | hsl(261, 34%, 37%) |
| OKLCH | oklch(42.3% 0.105 297.6) |
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 #553F7F | 8.73:1 | AAA | Lc -94.3 | Preferred for body text |
| Black text on #553F7F | 2.40:1 | Fails | Lc 14.2 | Not readable |
| #553F7F text on white | 8.73:1 | AAA | Lc 89.8 | Fine for body text |
| #553F7F text on black | 2.40:1 | Fails | Lc -12.5 | 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
#EBE8F5
oklch(93.7% 0.018 296.6)
-
Step 200
200
#DBD5ED
oklch(88.5% 0.033 297.2)
-
Step 300
300
#C5B9E4
oklch(81% 0.061 297.8)
-
Step 400
400
#A793D6
oklch(70.6% 0.098 297.5)
-
Step 500
500
#9378CB
oklch(63.2% 0.124 297.7)
-
Step 600
600
#7D5FB8
oklch(55.6% 0.136 297.3)
-
Step 700
700
#6A4E9E
oklch(49.1% 0.126 297.7)
-
Step 800
800 (this color)
#553F7F
oklch(42.3% 0.105 297.6)
-
Step 900
900
#473767
oklch(37.7% 0.081 297.7)
-
Step 950
950
#29203C
oklch(26.8% 0.052 297.6)
#553F7F 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) | #2A4B81 | 0.066 |
| Deuteranopia (no green cones) | #2E4A7D | 0.063 |
| Tritanopia (no blue cones) | #4C4B59 | 0.082 |
| Achromatopsia (no color) | #4B4B4B | 0.105 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #553F7F
#553F7F
oklch(42.3% 0.105 297.6)
- #4A5400
#4A5400
oklch(42.2% 0.098 117.4)
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 #553F7F, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Slate Blue #483D8B ΔE 0.032
- Blueberry #464196 ΔE 0.045
- Twilight #4E518B ΔE 0.049
- Dusk #4E5481 ΔE 0.058
- Rebecca Purple #663399 ΔE 0.060
- Dusty Grape #545775 ΔE 0.074
- Cobalt #1E488F ΔE 0.078
- Dusk Blue #26538D ΔE 0.078
Use #553F7F 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.