#6553BC
Closest named color: Iris (#6258C4). oklch(51.5% 0.159 287.3), rgb(101, 83, 188).
Aa
White text reads best on this color (5.97:1).
About this color
#6553BC is a medium-dark, vivid purple. In OKLCH its lightness is 52%, its chroma 0.159 and its hue 287°. Its hue sits on the cool side of the wheel. The nearest named color is Iris (#6258C4), ΔE 0.017 away. White text reads best on it, at 5.97:1.
| Hue family | Purples |
| Lightness | medium-dark (52%) |
| Chroma | vivid (0.159) |
| Temperature | cool |
| Nearest name | Iris (#6258C4) |
| Black text | 3.51:1 |
| White text | 5.97:1 |
Values
| HEX | #6553BC |
| RGB | rgb(101, 83, 188) |
| HSL | hsl(250, 44%, 53%) |
| OKLCH | oklch(51.5% 0.159 287.3) |
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 #6553BC | 5.97:1 | AA | Lc -84.8 | Fine for body text |
| Black text on #6553BC | 3.51:1 | AA large text | Lc 24.5 | Dividers and decoration only |
| #6553BC text on white | 5.97:1 | AA | Lc 79.6 | Fine for body text |
| #6553BC text on black | 3.51:1 | AA large text | Lc -22.3 | 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
#F5F5FC
oklch(97.2% 0.009 286.2)
-
Step 100
100
#E8E8F8
oklch(93.6% 0.022 286)
-
Step 200
200
#D7D5F5
oklch(88.5% 0.044 288.3)
-
Step 300
300
#BDBAF0
oklch(81% 0.076 287.1)
-
Step 400
400
#9C94E9
oklch(70.7% 0.123 287.1)
-
Step 500
500
#8677E2
oklch(63.2% 0.156 287.5)
-
Step 600
600
#705DD0
oklch(55.6% 0.171 287.1)
-
Step 700
700 (this color)
#6553BC
oklch(51.5% 0.159 287.3)
-
Step 800
800
#4D3F92
oklch(42.8% 0.131 287.2)
-
Step 900
900
#403674
oklch(37.7% 0.102 287.9)
-
Step 950
950
#252044
oklch(26.9% 0.065 287.6)
#6553BC 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) | #1666C0 | 0.087 |
| Deuteranopia (no green cones) | #1561BA | 0.087 |
| Tritanopia (no blue cones) | #496A7F | 0.132 |
| Achromatopsia (no color) | #636363 | 0.159 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #6553BC
#6553BC
oklch(51.5% 0.159 287.3)
- #6F6B00
#6F6B00
oklch(51.5% 0.11 107.1)
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 #6553BC, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Iris #6258C4 ΔE 0.017
- Slate Blue #6A5ACD ΔE 0.032
- Light Indigo #6D5ACF ΔE 0.036
- Dark Periwinkle #665FD1 ΔE 0.041
- Bluey Purple #6241C7 ΔE 0.044
- Warm Blue #4B57DB ΔE 0.060
- Blue With A Hint Of Purple #533CC6 ΔE 0.064
- Blurple #5539CC ΔE 0.069
Use #6553BC 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.