#645FA9
Closest named color: Iris (#6258C4). oklch(52.4% 0.114 284.8), rgb(100, 95, 169).
Aa
White text reads best on this color (5.59:1).
About this color
#645FA9 is a medium-dark, moderately saturated purple. In OKLCH its lightness is 52%, its chroma 0.114 and its hue 285°. Its hue sits on the cool side of the wheel. The nearest named color is Iris (#6258C4), ΔE 0.049 away. White text reads best on it, at 5.59:1.
| Hue family | Purples |
| Lightness | medium-dark (52%) |
| Chroma | moderately saturated (0.114) |
| Temperature | cool |
| Nearest name | Iris (#6258C4) |
| Black text | 3.75:1 |
| White text | 5.59:1 |
Values
| HEX | #645FA9 |
| RGB | rgb(100, 95, 169) |
| HSL | hsl(244, 30%, 52%) |
| OKLCH | oklch(52.4% 0.114 284.8) |
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 #645FA9 | 5.59:1 | AA | Lc -83.2 | Fine for body text |
| Black text on #645FA9 | 3.75:1 | AA large text | Lc 26.2 | Dividers and decoration only |
| #645FA9 text on white | 5.59:1 | AA | Lc 77.9 | Fine for body text |
| #645FA9 text on black | 3.75:1 | AA large text | Lc -23.9 | 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
#D6D7EC
oklch(88.5% 0.029 283.6)
-
Step 300
300
#BCBDE1
oklch(80.9% 0.051 284)
-
Step 400
400
#9B9AD2
oklch(70.8% 0.081 284.9)
-
Step 500
500
#8380C7
oklch(63.2% 0.106 284.9)
-
Step 600
600 (this color)
#645FA9
oklch(52.4% 0.114 284.8)
-
Step 700
700
#5B569A
oklch(49% 0.107 285.1)
-
Step 800
800
#4A477D
oklch(42.7% 0.088 284.5)
-
Step 900
900
#3E3C64
oklch(37.7% 0.068 285)
-
Step 950
950
#24233B
oklch(26.9% 0.044 284.9)
#645FA9 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) | #446AAC | 0.047 |
| Deuteranopia (no green cones) | #4265A7 | 0.046 |
| Tritanopia (no blue cones) | #506E7C | 0.098 |
| Achromatopsia (no color) | #686868 | 0.115 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #645FA9
#645FA9
oklch(52.4% 0.114 284.8)
- #746D00
#746D00
oklch(52.4% 0.111 105.2)
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 #645FA9, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Iris #6258C4 ΔE 0.049
- French Blue #436BAD ΔE 0.049
- Dusky Blue #475F94 ΔE 0.054
- Slate Blue #6A5ACD ΔE 0.060
- Dark Periwinkle #665FD1 ΔE 0.063
- Light Indigo #6D5ACF ΔE 0.064
- Dark Lavender #856798 ΔE 0.067
- Twilight #4E518B ΔE 0.068
Use #645FA9 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.