#5550C9
Closest named color: Iris (#6258C4). oklch(50.7% 0.182 279.5), rgb(85, 80, 201).
Aa
White text reads best on this color (6.21:1).
About this color
#5550C9 is a medium-dark, vivid blue. In OKLCH its lightness is 51%, its chroma 0.182 and its hue 280°. Its hue sits on the cool side of the wheel. The nearest named color is Iris (#6258C4), ΔE 0.031 away. White text reads best on it, at 6.21:1.
| Hue family | Blues |
| Lightness | medium-dark (51%) |
| Chroma | vivid (0.182) |
| Temperature | cool |
| Nearest name | Iris (#6258C4) |
| Black text | 3.37:1 |
| White text | 6.21:1 |
Values
| HEX | #5550C9 |
| RGB | rgb(85, 80, 201) |
| HSL | hsl(242, 53%, 55%) |
| OKLCH | oklch(50.7% 0.182 279.5) |
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 #5550C9 | 6.21:1 | AA | Lc -85.7 | Fine for body text |
| Black text on #5550C9 | 3.37:1 | AA large text | Lc 23.5 | Dividers and decoration only |
| #5550C9 text on white | 6.21:1 | AA | Lc 80.6 | Fine for body text |
| #5550C9 text on black | 3.37:1 | AA large text | Lc -21.3 | 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
#F3F5FE
oklch(97.1% 0.012 276.1)
-
Step 100
100
#E6E8FB
oklch(93.5% 0.026 281.1)
-
Step 200
200
#D2D6FA
oklch(88.4% 0.05 280.3)
-
Step 300
300
#B4BBF9
oklch(80.9% 0.088 279.2)
-
Step 400
400
#8F95F6
oklch(70.6% 0.141 279.4)
-
Step 500
500
#7677F3
oklch(63% 0.181 279.5)
-
Step 600
600
#615DE1
oklch(55.6% 0.195 279.3)
-
Step 700
700 (this color)
#5550C9
oklch(50.7% 0.182 279.5)
-
Step 800
800
#423E9E
oklch(42.6% 0.151 279.7)
-
Step 900
900
#37367E
oklch(37.6% 0.119 279.7)
-
Step 950
950
#20214A
oklch(27.1% 0.074 279.2)
#5550C9 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) | #0065CD | 0.074 |
| Deuteranopia (no green cones) | #005CC7 | 0.069 |
| Tritanopia (no blue cones) | #0B6D85 | 0.156 |
| Achromatopsia (no color) | #616161 | 0.183 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #5550C9
#5550C9
oklch(50.7% 0.182 279.5)
- #746500
#746500
oklch(50.6% 0.105 99.1)
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 #5550C9, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Iris #6258C4 ΔE 0.031
- Warm Blue #4B57DB ΔE 0.033
- Bluey Purple #6241C7 ΔE 0.035
- Slate Blue #6A5ACD ΔE 0.043
- Blue With A Hint Of Purple #533CC6 ΔE 0.043
- Blurple #5539CC ΔE 0.047
- Light Indigo #6D5ACF ΔE 0.047
- Dark Periwinkle #665FD1 ΔE 0.047
Use #5550C9 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.