#644FB0
Closest named color: Iris (#6258C4). oklch(49.9% 0.148 289.9), rgb(100, 79, 176).
Aa
White text reads best on this color (6.38:1).
About this color
#644FB0 is a medium-dark, vivid purple. In OKLCH its lightness is 50%, its chroma 0.148 and its hue 290°. Its hue sits on the cool side of the wheel. The nearest named color is Iris (#6258C4), ΔE 0.036 away. White text reads best on it, at 6.38:1.
| Hue family | Purples |
| Lightness | medium-dark (50%) |
| Chroma | vivid (0.148) |
| Temperature | cool |
| Nearest name | Iris (#6258C4) |
| Black text | 3.28:1 |
| White text | 6.38:1 |
Values
| HEX | #644FB0 |
| RGB | rgb(100, 79, 176) |
| HSL | hsl(253, 38%, 50%) |
| OKLCH | oklch(49.9% 0.148 289.9) |
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 #644FB0 | 6.38:1 | AA | Lc -86.6 | Fine for body text |
| Black text on #644FB0 | 3.28:1 | AA large text | Lc 22.6 | Dividers and decoration only |
| #644FB0 text on white | 6.38:1 | AA | Lc 81.5 | Fine for body text |
| #644FB0 text on black | 3.28:1 | AA large text | Lc -20.4 | 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 700.
-
Step 50
50
#F5F4FC
oklch(97% 0.011 292)
-
Step 100
100
#E9E8F7
oklch(93.6% 0.02 289.1)
-
Step 200
200
#D8D5F2
oklch(88.4% 0.04 290.3)
-
Step 300
300
#BFB9ED
oklch(80.8% 0.073 289.9)
-
Step 400
400
#A094E3
oklch(70.8% 0.114 290.1)
-
Step 500
500
#8977DB
oklch(63% 0.147 289.8)
-
Step 600
600
#745EC9
oklch(55.6% 0.16 289.6)
-
Step 700
700 (this color)
#644FB0
oklch(49.9% 0.148 289.9)
-
Step 800
800
#503F8C
oklch(42.6% 0.123 290.4)
-
Step 900
900
#423770
oklch(37.8% 0.095 290)
-
Step 950
950
#262042
oklch(26.9% 0.062 289.7)
#644FB0 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) | #1E61B3 | 0.086 |
| Deuteranopia (no green cones) | #215DAE | 0.083 |
| Tritanopia (no blue cones) | #4E6478 | 0.122 |
| Achromatopsia (no color) | #5F5F5F | 0.149 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #644FB0
#644FB0
oklch(49.9% 0.148 289.9)
- #676800
#676800
oklch(50% 0.109 110.4)
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 #644FB0, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Iris #6258C4 ΔE 0.036
- Bluey Purple #6241C7 ΔE 0.049
- Slate Blue #6A5ACD ΔE 0.052
- Light Indigo #6D5ACF ΔE 0.056
- Dark Periwinkle #665FD1 ΔE 0.061
- Blue With A Hint Of Purple #533CC6 ΔE 0.065
- Rebecca Purple #663399 ΔE 0.070
- Twilight #4E518B ΔE 0.070
Use #644FB0 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.