#645FAE
Closest named color: Iris (#6258C4). oklch(52.7% 0.122 284.3), rgb(100, 95, 174).
Aa
White text reads best on this color (5.54:1).
About this color
#645FAE is a medium-dark, moderately saturated purple. In OKLCH its lightness is 53%, its chroma 0.122 and its hue 284°. Its hue sits on the cool side of the wheel. The nearest named color is Iris (#6258C4), ΔE 0.041 away. White text reads best on it, at 5.54:1.
| Hue family | Purples |
| Lightness | medium-dark (53%) |
| Chroma | moderately saturated (0.122) |
| Temperature | cool |
| Nearest name | Iris (#6258C4) |
| Black text | 3.78:1 |
| White text | 5.54:1 |
Values
| HEX | #645FAE |
| RGB | rgb(100, 95, 174) |
| HSL | hsl(244, 33%, 53%) |
| OKLCH | oklch(52.7% 0.122 284.3) |
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 #645FAE | 5.54:1 | AA | Lc -82.8 | Fine for body text |
| Black text on #645FAE | 3.78:1 | AA large text | Lc 26.5 | Dividers and decoration only |
| #645FAE text on white | 5.54:1 | AA | Lc 77.5 | Fine for body text |
| #645FAE text on black | 3.78:1 | AA large text | Lc -24.2 | 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
#F5F5FA
oklch(97.2% 0.007 286.3)
-
Step 100
100
#E8E9F4
oklch(93.6% 0.015 281.9)
-
Step 200
200
#D6D7ED
oklch(88.5% 0.03 283.7)
-
Step 300
300
#BCBCE3
oklch(80.8% 0.055 285.1)
-
Step 400
400
#9A99D6
oklch(70.7% 0.089 284.6)
-
Step 500
500
#827FCB
oklch(63.1% 0.113 284.5)
-
Step 600
600 (this color)
#645FAE
oklch(52.7% 0.122 284.3)
-
Step 700
700
#5A569E
oklch(49.1% 0.113 284)
-
Step 800
800
#4A4680
oklch(42.6% 0.094 284.8)
-
Step 900
900
#3D3B67
oklch(37.6% 0.074 284.3)
-
Step 950
950
#24233C
oklch(27% 0.046 284.7)
#645FAE 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) | #416BB1 | 0.051 |
| Deuteranopia (no green cones) | #3E66AC | 0.051 |
| Tritanopia (no blue cones) | #4E6F7E | 0.104 |
| Achromatopsia (no color) | #686868 | 0.122 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #645FAE
#645FAE
oklch(52.7% 0.122 284.3)
- #766D00
#766D00
oklch(52.6% 0.111 103.8)
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 #645FAE, closest first.
No curated palette has a color within ΔE 0.04 of #645FAE.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Iris #6258C4 ΔE 0.041
- French Blue #436BAD ΔE 0.050
- Slate Blue #6A5ACD ΔE 0.052
- Dark Periwinkle #665FD1 ΔE 0.055
- Light Indigo #6D5ACF ΔE 0.056
- Dusky Blue #475F94 ΔE 0.060
- Deep Lavender #8D5EB7 ΔE 0.069
- Mid Blue #276AB3 ΔE 0.069
Use #645FAE 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.