#5551B2
Closest named color: Iris (#6258C4). oklch(49.1% 0.15 281.2), rgb(85, 81, 178).
Aa
White text reads best on this color (6.55:1).
About this color
#5551B2 is a medium-dark, vivid purple. In OKLCH its lightness is 49%, its chroma 0.150 and its hue 281°. Its hue sits on the cool side of the wheel. The nearest named color is Iris (#6258C4), ΔE 0.039 away. White text reads best on it, at 6.55:1.
| Hue family | Purples |
| Lightness | medium-dark (49%) |
| Chroma | vivid (0.150) |
| Temperature | cool |
| Nearest name | Iris (#6258C4) |
| Black text | 3.20:1 |
| White text | 6.55:1 |
Values
| HEX | #5551B2 |
| RGB | rgb(85, 81, 178) |
| HSL | hsl(242, 39%, 51%) |
| OKLCH | oklch(49.1% 0.15 281.2) |
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 #5551B2 | 6.55:1 | AA | Lc -87.2 | Fine for body text |
| Black text on #5551B2 | 3.20:1 | AA large text | Lc 21.9 | Dividers and decoration only |
| #5551B2 text on white | 6.55:1 | AA | Lc 82.2 | Fine for body text |
| #5551B2 text on black | 3.20:1 | AA large text | Lc -19.7 | 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
#F4F5FC
oklch(97.1% 0.009 279.7)
-
Step 100
100
#E7E9F8
oklch(93.7% 0.02 279.9)
-
Step 200
200
#D4D7F4
oklch(88.6% 0.04 280.9)
-
Step 300
300
#B8BCEF
oklch(81% 0.072 281.2)
-
Step 400
400
#9497E7
oklch(70.6% 0.116 281.3)
-
Step 500
500
#7C7CE0
oklch(63.2% 0.148 281.3)
-
Step 600
600
#6663CE
oklch(55.7% 0.161 281.1)
-
Step 700
700 (this color)
#5551B2
oklch(49.1% 0.15 281.2)
-
Step 800
800
#454390
oklch(42.7% 0.124 281)
-
Step 900
900
#3A3973
oklch(37.7% 0.097 281.5)
-
Step 950
950
#222243
oklch(27% 0.06 281.6)
#5551B2 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) | #1861B5 | 0.067 |
| Deuteranopia (no green cones) | #095AB0 | 0.069 |
| Tritanopia (no blue cones) | #2F6779 | 0.129 |
| Achromatopsia (no color) | #5D5D5D | 0.150 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #5551B2
#5551B2
oklch(49.1% 0.15 281.2)
- #6D6200
#6D6200
oklch(49.1% 0.103 101.8)
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 #5551B2, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Iris #6258C4 ΔE 0.039
- Bluey Purple #6241C7 ΔE 0.052
- Blue With A Hint Of Purple #533CC6 ΔE 0.057
- Slate Blue #6A5ACD ΔE 0.058
- Light Indigo #6D5ACF ΔE 0.063
- Twilight #4E518B ΔE 0.064
- Dark Periwinkle #665FD1 ΔE 0.064
- Blueberry #464196 ΔE 0.064
Use #5551B2 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.