#645EC0
Closest named color: Iris (#6258C4). oklch(53.7% 0.149 282.9), rgb(100, 94, 192).
Aa
White text reads best on this color (5.37:1).
About this color
#645EC0 is a medium-dark, vivid purple. In OKLCH its lightness is 54%, its chroma 0.149 and its hue 283°. 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 5.37:1.
| Hue family | Purples |
| Lightness | medium-dark (54%) |
| Chroma | vivid (0.149) |
| Temperature | cool |
| Nearest name | Iris (#6258C4) |
| Black text | 3.90:1 |
| White text | 5.37:1 |
Values
| HEX | #645EC0 |
| RGB | rgb(100, 94, 192) |
| HSL | hsl(244, 44%, 56%) |
| OKLCH | oklch(53.7% 0.149 282.9) |
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 #645EC0 | 5.37:1 | AA | Lc -81.9 | Fine for body text |
| Black text on #645EC0 | 3.90:1 | AA large text | Lc 27.5 | Dividers and decoration only |
| #645EC0 text on white | 5.37:1 | AA | Lc 76.6 | Fine for body text |
| #645EC0 text on black | 3.90:1 | AA large text | Lc -25.2 | 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
#F4F5FB
oklch(97.1% 0.008 278.6)
-
Step 100
100
#E8E9F7
oklch(93.7% 0.019 282.8)
-
Step 200
200
#D5D7F2
oklch(88.6% 0.037 282.2)
-
Step 300
300
#BABCEB
oklch(81% 0.066 282.9)
-
Step 400
400
#9798E1
oklch(70.7% 0.106 282.7)
-
Step 500
500
#7F7CD9
oklch(63% 0.137 283.2)
-
Step 600
600 (this color)
#645EC0
oklch(53.7% 0.149 282.9)
-
Step 700
700
#5852AB
oklch(49% 0.138 283.1)
-
Step 800
800
#48448B
oklch(42.8% 0.114 283)
-
Step 900
900
#3C3A6F
oklch(37.8% 0.089 283)
-
Step 950
950
#232241
oklch(27% 0.057 283.4)
#645EC0 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) | #306EC3 | 0.066 |
| Deuteranopia (no green cones) | #2A67BE | 0.067 |
| Tritanopia (no blue cones) | #447386 | 0.127 |
| Achromatopsia (no color) | #6A6A6A | 0.149 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #645EC0
#645EC0
oklch(53.7% 0.149 282.9)
- #7A7000
#7A7000
oklch(53.7% 0.113 103.3)
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 #645EC0, 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 0.025
- Dark Periwinkle #665FD1 ΔE 0.026
- Light Indigo #6D5ACF ΔE 0.029
- Warm Blue #4B57DB ΔE 0.059
- French Blue #436BAD ΔE 0.063
- Royal Blue #4169E1 ΔE 0.066
- Bluey Purple #6241C7 ΔE 0.068
Use #645EC0 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.