#6553CF
Closest named color: Slate Blue (#6A5ACD). oklch(52.9% 0.184 284.8), rgb(101, 83, 207).
Aa
White text reads best on this color (5.68:1).
About this color
#6553CF is a medium-dark, vivid purple. In OKLCH its lightness is 53%, its chroma 0.184 and its hue 285°. Its hue sits on the cool side of the wheel. The nearest named color is Slate Blue (#6A5ACD), ΔE 0.019 away. White text reads best on it, at 5.68:1.
| Hue family | Purples |
| Lightness | medium-dark (53%) |
| Chroma | vivid (0.184) |
| Temperature | cool |
| Nearest name | Slate Blue (#6A5ACD) |
| Black text | 3.69:1 |
| White text | 5.68:1 |
Values
| HEX | #6553CF |
| RGB | rgb(101, 83, 207) |
| HSL | hsl(249, 56%, 57%) |
| OKLCH | oklch(52.9% 0.184 284.8) |
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 #6553CF | 5.68:1 | AA | Lc -83.3 | Fine for body text |
| Black text on #6553CF | 3.69:1 | AA large text | Lc 26.0 | Dividers and decoration only |
| #6553CF text on white | 5.68:1 | AA | Lc 78.0 | Fine for body text |
| #6553CF text on black | 3.69:1 | AA large text | Lc -23.7 | 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 600.
-
Step 50
50
#F4F5FD
oklch(97.2% 0.011 280.5)
-
Step 100
100
#E8E8FA
oklch(93.6% 0.024 285.9)
-
Step 200
200
#D5D6F7
oklch(88.6% 0.045 284.1)
-
Step 300
300
#BABAF5
oklch(81% 0.083 284.4)
-
Step 400
400
#9894EF
oklch(70.7% 0.131 284.5)
-
Step 500
500
#8176EA
oklch(63.1% 0.169 284.8)
-
Step 600
600 (this color)
#6553CF
oklch(52.9% 0.184 284.8)
-
Step 700
700
#5B4ABC
oklch(49.1% 0.172 284.9)
-
Step 800
800
#4A3E98
oklch(42.8% 0.142 284.8)
-
Step 900
900
#3D3679
oklch(37.8% 0.11 284.5)
-
Step 950
950
#242047
oklch(27.1% 0.07 285.3)
#6553CF 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) | #006AD3 | 0.092 |
| Deuteranopia (no green cones) | #0063CC | 0.090 |
| Tritanopia (no blue cones) | #3C7089 | 0.154 |
| Achromatopsia (no color) | #676767 | 0.184 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #6553CF
#6553CF
oklch(52.9% 0.184 284.8)
- #766E00
#766E00
oklch(52.9% 0.112 104.6)
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 #6553CF, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Slate Blue #6A5ACD ΔE 0.019
- Iris #6258C4 ΔE 0.021
- Light Indigo #6D5ACF ΔE 0.022
- Dark Periwinkle #665FD1 ΔE 0.028
- Bluey Purple #6241C7 ΔE 0.041
- Warm Blue #4B57DB ΔE 0.041
- Blue With A Hint Of Purple #533CC6 ΔE 0.061
- Blurple #5539CC ΔE 0.062
Use #6553CF 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.