#645198
Closest named color: Twilight (#4E518B). oklch(48.7% 0.112 294.2), rgb(100, 81, 152).
Aa
White text reads best on this color (6.61:1).
About this color
#645198 is a medium-dark, moderately saturated purple. In OKLCH its lightness is 49%, its chroma 0.112 and its hue 294°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Twilight (#4E518B), ΔE 0.042 away. White text reads best on it, at 6.61:1.
| Hue family | Purples |
| Lightness | medium-dark (49%) |
| Chroma | moderately saturated (0.112) |
| Temperature | in between |
| Nearest name | Twilight (#4E518B) |
| Black text | 3.17:1 |
| White text | 6.61:1 |
Values
| HEX | #645198 |
| RGB | rgb(100, 81, 152) |
| HSL | hsl(256, 30%, 46%) |
| OKLCH | oklch(48.7% 0.112 294.2) |
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 #645198 | 6.61:1 | AA | Lc -87.6 | Fine for body text |
| Black text on #645198 | 3.17:1 | AA large text | Lc 21.4 | Dividers and decoration only |
| #645198 text on white | 6.61:1 | AA | Lc 82.6 | Fine for body text |
| #645198 text on black | 3.17:1 | AA large text | Lc -19.3 | 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 700.
-
Step 50
50
#F5F5FA
oklch(97.2% 0.007 286.3)
-
Step 100
100
#EAE8F4
oklch(93.6% 0.016 293.7)
-
Step 200
200
#DAD6EC
oklch(88.6% 0.03 294.1)
-
Step 300
300
#C2BAE1
oklch(80.8% 0.055 294.5)
-
Step 400
400
#A396D2
oklch(70.6% 0.087 294)
-
Step 500
500
#8E7BC6
oklch(63.1% 0.112 294.6)
-
Step 600
600
#7863B2
oklch(55.5% 0.121 294.4)
-
Step 700
700 (this color)
#645198
oklch(48.7% 0.112 294.2)
-
Step 800
800
#52447C
oklch(42.7% 0.091 293.7)
-
Step 900
900
#443964
oklch(37.6% 0.073 294.4)
-
Step 950
950
#28223B
oklch(27.1% 0.046 294.1)
#645198 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) | #3A5D9B | 0.063 |
| Deuteranopia (no green cones) | #3D5C96 | 0.060 |
| Tritanopia (no blue cones) | #585E6D | 0.090 |
| Achromatopsia (no color) | #5D5D5D | 0.112 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #645198
#645198
oklch(48.7% 0.112 294.2)
- #5F6600
#5F6600
oklch(48.7% 0.11 114.4)
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 #645198, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Twilight #4E518B ΔE 0.042
- Dusk #4E5481 ΔE 0.054
- Dusky Blue #475F94 ΔE 0.055
- Denim Blue #3B5B92 ΔE 0.063
- Muted Purple #805B87 ΔE 0.067
- Blueberry #464196 ΔE 0.068
- Dusty Grape #545775 ΔE 0.069
- Iris #6258C4 ΔE 0.070
Use #645198 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.