#555299
Closest named color: Twilight (#4E518B). oklch(47.6% 0.112 283.2), rgb(85, 82, 153).
Aa
White text reads best on this color (6.87:1).
About this color
#555299 is a medium-dark, moderately saturated purple. In OKLCH its lightness is 48%, its chroma 0.112 and its hue 283°. Its hue sits on the cool side of the wheel. The nearest named color is Twilight (#4E518B), ΔE 0.025 away. White text reads best on it, at 6.87:1.
| Hue family | Purples |
| Lightness | medium-dark (48%) |
| Chroma | moderately saturated (0.112) |
| Temperature | cool |
| Nearest name | Twilight (#4E518B) |
| Black text | 3.05:1 |
| White text | 6.87:1 |
Values
| HEX | #555299 |
| RGB | rgb(85, 82, 153) |
| HSL | hsl(243, 30%, 46%) |
| OKLCH | oklch(47.6% 0.112 283.2) |
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 #555299 | 6.87:1 | AA | Lc -88.6 | Fine for body text |
| Black text on #555299 | 3.05:1 | AA large text | Lc 20.4 | Dividers and decoration only |
| #555299 text on white | 6.87:1 | AA | Lc 83.6 | Fine for body text |
| #555299 text on black | 3.05:1 | AA large text | Lc -18.3 | Dividers and decoration only |
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 700.
-
Step 50
50
#F4F5FA
oklch(97.1% 0.007 277.2)
-
Step 100
100
#E8E9F4
oklch(93.6% 0.015 281.9)
-
Step 200
200
#D6D7ED
oklch(88.5% 0.03 283.7)
-
Step 300
300
#BBBDE3
oklch(80.9% 0.053 282.8)
-
Step 400
400
#999AD5
oklch(70.7% 0.086 283.2)
-
Step 500
500
#8180CA
oklch(63.2% 0.11 283.4)
-
Step 600
600
#6B68B7
oklch(55.6% 0.12 283.5)
-
Step 700
700 (this color)
#555299
oklch(47.6% 0.112 283.2)
-
Step 800
800
#494780
oklch(42.8% 0.093 283.3)
-
Step 900
900
#3D3C67
oklch(37.8% 0.073 283.4)
-
Step 950
950
#23233C
oklch(26.9% 0.046 282.9)
#555299 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) | #365D9C | 0.046 |
| Deuteranopia (no green cones) | #335897 | 0.045 |
| Tritanopia (no blue cones) | #40616E | 0.097 |
| Achromatopsia (no color) | #5A5A5A | 0.112 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #555299
#555299
oklch(47.6% 0.112 283.2)
- #675E00
#675E00
oklch(47.6% 0.1 103)
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 #555299, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Twilight #4E518B ΔE 0.025
- Dusky Blue #475F94 ΔE 0.042
- Dusk #4E5481 ΔE 0.043
- Denim Blue #3B5B92 ΔE 0.044
- Blueberry #464196 ΔE 0.053
- Light Navy Blue #2E5A88 ΔE 0.062
- Dusk Blue #26538D ΔE 0.063
- Dark Slate Blue #483D8B ΔE 0.063
Use #555299 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.