#645DBD
Closest named color: Iris (#6258C4). oklch(53.3% 0.146 283.6), rgb(100, 93, 189).
Aa
White text reads best on this color (5.46:1).
About this color
#645DBD is a medium-dark, vivid purple. In OKLCH its lightness is 53%, its chroma 0.146 and its hue 284°. Its hue sits on the cool side of the wheel. The nearest named color is Iris (#6258C4), ΔE 0.018 away. White text reads best on it, at 5.46:1.
| Hue family | Purples |
| Lightness | medium-dark (53%) |
| Chroma | vivid (0.146) |
| Temperature | cool |
| Nearest name | Iris (#6258C4) |
| Black text | 3.84:1 |
| White text | 5.46:1 |
Values
| HEX | #645DBD |
| RGB | rgb(100, 93, 189) |
| HSL | hsl(244, 42%, 55%) |
| OKLCH | oklch(53.3% 0.146 283.6) |
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 #645DBD | 5.46:1 | AA | Lc -82.4 | Fine for body text |
| Black text on #645DBD | 3.84:1 | AA large text | Lc 27.0 | Dividers and decoration only |
| #645DBD text on white | 5.46:1 | AA | Lc 77.1 | Fine for body text |
| #645DBD text on black | 3.84:1 | AA large text | Lc -24.7 | 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
#E8E8F7
oklch(93.5% 0.02 286)
-
Step 200
200
#D5D7F1
oklch(88.6% 0.036 282.1)
-
Step 300
300
#BABCEA
oklch(80.9% 0.065 282.9)
-
Step 400
400
#9898E0
oklch(70.8% 0.104 283.4)
-
Step 500
500
#807CD7
oklch(63% 0.135 283.8)
-
Step 600
600 (this color)
#645DBD
oklch(53.3% 0.146 283.6)
-
Step 700
700
#5952AA
oklch(49.1% 0.136 283.8)
-
Step 800
800
#48448A
oklch(42.7% 0.113 283.1)
-
Step 900
900
#3C3A6E
oklch(37.7% 0.087 283.1)
-
Step 950
950
#232240
oklch(26.9% 0.055 283.6)
#645DBD 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) | #316CC0 | 0.065 |
| Deuteranopia (no green cones) | #2C66BB | 0.066 |
| Tritanopia (no blue cones) | #467284 | 0.125 |
| Achromatopsia (no color) | #696969 | 0.146 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #645DBD
#645DBD
oklch(53.3% 0.146 283.6)
- #786F00
#786F00
oklch(53.3% 0.113 103.9)
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 #645DBD, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Iris #6258C4 ΔE 0.018
- Slate Blue #6A5ACD ΔE 0.028
- Dark Periwinkle #665FD1 ΔE 0.031
- Light Indigo #6D5ACF ΔE 0.032
- Warm Blue #4B57DB ΔE 0.062
- French Blue #436BAD ΔE 0.062
- Bluey Purple #6241C7 ΔE 0.067
- Deep Lavender #8D5EB7 ΔE 0.069
Use #645DBD 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.