#645DC7
Closest named color: Iris (#6258C4). oklch(54% 0.16 282.6), rgb(100, 93, 199).
Aa
White text reads best on this color (5.34:1).
About this color
#645DC7 is a medium-dark, vivid purple. In OKLCH its lightness is 54%, its chroma 0.160 and its hue 283°. Its hue sits on the cool side of the wheel. The nearest named color is Iris (#6258C4), ΔE 0.013 away. White text reads best on it, at 5.34:1.
| Hue family | Purples |
| Lightness | medium-dark (54%) |
| Chroma | vivid (0.160) |
| Temperature | cool |
| Nearest name | Iris (#6258C4) |
| Black text | 3.93:1 |
| White text | 5.34:1 |
Values
| HEX | #645DC7 |
| RGB | rgb(100, 93, 199) |
| HSL | hsl(244, 49%, 57%) |
| OKLCH | oklch(54% 0.16 282.6) |
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 #645DC7 | 5.34:1 | AA | Lc -81.7 | Fine for body text |
| Black text on #645DC7 | 3.93:1 | AA large text | Lc 27.8 | Dividers and decoration only |
| #645DC7 text on white | 5.34:1 | AA | Lc 76.3 | Fine for body text |
| #645DC7 text on black | 3.93:1 | AA large text | Lc -25.4 | 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
#F4F5FC
oklch(97.1% 0.009 279.7)
-
Step 100
100
#E7E8F8
oklch(93.5% 0.022 283.1)
-
Step 200
200
#D5D6F4
oklch(88.5% 0.041 284)
-
Step 300
300
#B9BBEE
oklch(80.8% 0.072 282.9)
-
Step 400
400
#9697E6
oklch(70.7% 0.115 282.5)
-
Step 500
500
#7E7BDF
oklch(63.1% 0.147 282.7)
-
Step 600
600 (this color)
#645DC7
oklch(54% 0.16 282.6)
-
Step 700
700
#5750B1
oklch(49% 0.149 282.6)
-
Step 800
800
#47428F
oklch(42.6% 0.123 282.8)
-
Step 900
900
#3B3972
oklch(37.7% 0.095 282.4)
-
Step 950
950
#222243
oklch(27% 0.06 281.6)
#645DC7 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) | #246ECB | 0.073 |
| Deuteranopia (no green cones) | #1B67C5 | 0.075 |
| Tritanopia (no blue cones) | #3F7489 | 0.136 |
| Achromatopsia (no color) | #6B6B6B | 0.160 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #645DC7
#645DC7
oklch(54% 0.16 282.6)
- #7C7000
#7C7000
oklch(53.9% 0.113 102)
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 #645DC7, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Iris #6258C4 ΔE 0.013
- Slate Blue #6A5ACD ΔE 0.015
- Dark Periwinkle #665FD1 ΔE 0.016
- Light Indigo #6D5ACF ΔE 0.020
- Warm Blue #4B57DB ΔE 0.051
- Royal Blue #4169E1 ΔE 0.060
- Bluey Purple #6241C7 ΔE 0.063
- French Blue #436BAD ΔE 0.071
Use #645DC7 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.