#5551B5
Closest named color: Iris (#6258C4). oklch(49.3% 0.154 281), rgb(85, 81, 181).
Aa
White text reads best on this color (6.50:1).
About this color
#5551B5 is a medium-dark, vivid purple. In OKLCH its lightness is 49%, its chroma 0.154 and its hue 281°. Its hue sits on the cool side of the wheel. The nearest named color is Iris (#6258C4), ΔE 0.036 away. White text reads best on it, at 6.50:1.
| Hue family | Purples |
| Lightness | medium-dark (49%) |
| Chroma | vivid (0.154) |
| Temperature | cool |
| Nearest name | Iris (#6258C4) |
| Black text | 3.23:1 |
| White text | 6.50:1 |
Values
| HEX | #5551B5 |
| RGB | rgb(85, 81, 181) |
| HSL | hsl(242, 40%, 51%) |
| OKLCH | oklch(49.3% 0.154 281) |
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 #5551B5 | 6.50:1 | AA | Lc -87.0 | Fine for body text |
| Black text on #5551B5 | 3.23:1 | AA large text | Lc 22.1 | Dividers and decoration only |
| #5551B5 text on white | 6.50:1 | AA | Lc 81.9 | Fine for body text |
| #5551B5 text on black | 3.23:1 | AA large text | Lc -19.9 | 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
#D4D7F5
oklch(88.6% 0.041 281)
-
Step 300
300
#B7BCF0
oklch(80.9% 0.073 280.3)
-
Step 400
400
#9497E9
oklch(70.7% 0.119 281.3)
-
Step 500
500
#7B7BE2
oklch(63.1% 0.152 281.1)
-
Step 600
600
#6562D0
oklch(55.6% 0.165 280.8)
-
Step 700
700 (this color)
#5551B5
oklch(49.3% 0.154 281)
-
Step 800
800
#454292
oklch(42.7% 0.128 281.2)
-
Step 900
900
#393974
oklch(37.7% 0.099 280.6)
-
Step 950
950
#212244
oklch(27% 0.062 280.1)
#5551B5 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) | #1162B8 | 0.070 |
| Deuteranopia (no green cones) | #005AB3 | 0.071 |
| Tritanopia (no blue cones) | #2C687B | 0.133 |
| Achromatopsia (no color) | #5E5E5E | 0.154 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #5551B5
#5551B5
oklch(49.3% 0.154 281)
- #6E6200
#6E6200
oklch(49.2% 0.103 101)
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 #5551B5, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Iris #6258C4 ΔE 0.036
- Bluey Purple #6241C7 ΔE 0.048
- Blue With A Hint Of Purple #533CC6 ΔE 0.054
- Slate Blue #6A5ACD ΔE 0.055
- Light Indigo #6D5ACF ΔE 0.060
- Warm Blue #4B57DB ΔE 0.061
- Dark Periwinkle #665FD1 ΔE 0.061
- Blurple #5539CC ΔE 0.063
Use #5551B5 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.