#5551BC
Closest named color: Iris (#6258C4). oklch(49.8% 0.163 280.3), rgb(85, 81, 188).
Aa
White text reads best on this color (6.38:1).
About this color
#5551BC is a medium-dark, vivid purple. In OKLCH its lightness is 50%, its chroma 0.163 and its hue 280°. Its hue sits on the cool side of the wheel. The nearest named color is Iris (#6258C4), ΔE 0.030 away. White text reads best on it, at 6.38:1.
| Hue family | Purples |
| Lightness | medium-dark (50%) |
| Chroma | vivid (0.163) |
| Temperature | cool |
| Nearest name | Iris (#6258C4) |
| Black text | 3.28:1 |
| White text | 6.38:1 |
Values
| HEX | #5551BC |
| RGB | rgb(85, 81, 188) |
| HSL | hsl(242, 44%, 53%) |
| OKLCH | oklch(49.8% 0.163 280.3) |
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 #5551BC | 6.38:1 | AA | Lc -86.5 | Fine for body text |
| Black text on #5551BC | 3.28:1 | AA large text | Lc 22.7 | Dividers and decoration only |
| #5551BC text on white | 6.38:1 | AA | Lc 81.4 | Fine for body text |
| #5551BC text on black | 3.28:1 | AA large text | Lc -20.5 | 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
#F4F5FD
oklch(97.2% 0.011 280.5)
-
Step 100
100
#E6E9F9
oklch(93.6% 0.022 277.5)
-
Step 200
200
#D3D7F6
oklch(88.6% 0.043 279.7)
-
Step 300
300
#B6BBF3
oklch(80.8% 0.079 280.5)
-
Step 400
400
#9297EE
oklch(70.8% 0.126 280.1)
-
Step 500
500
#797AE8
oklch(63.1% 0.162 280.3)
-
Step 600
600
#6460D6
oklch(55.6% 0.176 280.5)
-
Step 700
700 (this color)
#5551BC
oklch(49.8% 0.163 280.3)
-
Step 800
800
#444196
oklch(42.7% 0.135 280.6)
-
Step 900
900
#393878
oklch(37.7% 0.106 280.7)
-
Step 950
950
#212146
oklch(26.9% 0.067 280.9)
#5551BC 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) | #0063C0 | 0.073 |
| Deuteranopia (no green cones) | #005BBA | 0.070 |
| Tritanopia (no blue cones) | #246A7E | 0.142 |
| Achromatopsia (no color) | #5F5F5F | 0.164 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #5551BC
#5551BC
oklch(49.8% 0.163 280.3)
- #716300
#716300
oklch(49.8% 0.103 99.6)
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 #5551BC, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Iris #6258C4 ΔE 0.030
- Bluey Purple #6241C7 ΔE 0.042
- Slate Blue #6A5ACD ΔE 0.048
- Blue With A Hint Of Purple #533CC6 ΔE 0.049
- Warm Blue #4B57DB ΔE 0.051
- Light Indigo #6D5ACF ΔE 0.053
- Dark Periwinkle #665FD1 ΔE 0.054
- Blurple #5539CC ΔE 0.056
Use #5551BC 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.