#6651AC
Closest named color: Iris (#6258C4). oklch(50.2% 0.14 291.1), rgb(102, 81, 172).
Aa
White text reads best on this color (6.29:1).
About this color
#6651AC is a medium-dark, moderately saturated purple. In OKLCH its lightness is 50%, its chroma 0.140 and its hue 291°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Iris (#6258C4), ΔE 0.040 away. White text reads best on it, at 6.29:1.
| Hue family | Purples |
| Lightness | medium-dark (50%) |
| Chroma | moderately saturated (0.140) |
| Temperature | in between |
| Nearest name | Iris (#6258C4) |
| Black text | 3.33:1 |
| White text | 6.29:1 |
Values
| HEX | #6651AC |
| RGB | rgb(102, 81, 172) |
| HSL | hsl(254, 36%, 50%) |
| OKLCH | oklch(50.2% 0.14 291.1) |
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 #6651AC | 6.29:1 | AA | Lc -86.2 | Fine for body text |
| Black text on #6651AC | 3.33:1 | AA large text | Lc 23.0 | Dividers and decoration only |
| #6651AC text on white | 6.29:1 | AA | Lc 81.1 | Fine for body text |
| #6651AC text on black | 3.33:1 | AA large text | Lc -20.8 | 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
#F5F4FB
oklch(97% 0.009 292.8)
-
Step 100
100
#E9E8F6
oklch(93.6% 0.019 289.3)
-
Step 200
200
#D9D5F1
oklch(88.5% 0.038 292.2)
-
Step 300
300
#C0BAEA
oklch(81% 0.067 290.5)
-
Step 400
400
#A194DF
oklch(70.7% 0.109 291.3)
-
Step 500
500
#8B78D6
oklch(63.1% 0.139 291.2)
-
Step 600
600
#765FC3
oklch(55.6% 0.15 291.3)
-
Step 700
700 (this color)
#6651AC
oklch(50.2% 0.14 291.1)
-
Step 800
800
#514089
oklch(42.7% 0.117 291.4)
-
Step 900
900
#43376D
oklch(37.7% 0.09 291.7)
-
Step 950
950
#272140
oklch(27.1% 0.057 291)
#6651AC 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) | #2962AF | 0.081 |
| Deuteranopia (no green cones) | #2C5EAA | 0.078 |
| Tritanopia (no blue cones) | #536477 | 0.114 |
| Achromatopsia (no color) | #606060 | 0.140 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #6651AC
#6651AC
oklch(50.2% 0.14 291.1)
- #676900
#676900
oklch(50.2% 0.11 111.1)
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 #6651AC, closest first.
No curated palette has a color within ΔE 0.04 of #6651AC.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Iris #6258C4 ΔE 0.040
- Slate Blue #6A5ACD ΔE 0.055
- Bluey Purple #6241C7 ΔE 0.058
- Light Indigo #6D5ACF ΔE 0.058
- Dark Periwinkle #665FD1 ΔE 0.064
- Twilight #4E518B ΔE 0.066
- Rebecca Purple #663399 ΔE 0.072
- Dusky Blue #475F94 ΔE 0.072
Use #6651AC 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.