#644BAC
Closest named color: Iris (#6258C4). oklch(48.9% 0.149 291.8), rgb(100, 75, 172).
Aa
White text reads best on this color (6.67:1).
About this color
#644BAC is a medium-dark, vivid purple. In OKLCH its lightness is 49%, its chroma 0.149 and its hue 292°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Iris (#6258C4), ΔE 0.046 away. White text reads best on it, at 6.67:1.
| Hue family | Purples |
| Lightness | medium-dark (49%) |
| Chroma | vivid (0.149) |
| Temperature | in between |
| Nearest name | Iris (#6258C4) |
| Black text | 3.14:1 |
| White text | 6.67:1 |
Values
| HEX | #644BAC |
| RGB | rgb(100, 75, 172) |
| HSL | hsl(255, 39%, 48%) |
| OKLCH | oklch(48.9% 0.149 291.8) |
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 #644BAC | 6.67:1 | AA | Lc -87.7 | Fine for body text |
| Black text on #644BAC | 3.14:1 | AA large text | Lc 21.4 | Dividers and decoration only |
| #644BAC text on white | 6.67:1 | AA | Lc 82.7 | Fine for body text |
| #644BAC text on black | 3.14:1 | AA large text | Lc -19.2 | 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 700.
-
Step 50
50
#F5F4FC
oklch(97% 0.011 292)
-
Step 100
100
#EAE8F7
oklch(93.7% 0.02 292.1)
-
Step 200
200
#D9D5F2
oklch(88.5% 0.04 291.9)
-
Step 300
300
#C1B9EC
oklch(81% 0.072 291.9)
-
Step 400
400
#A293E3
oklch(70.8% 0.116 291.8)
-
Step 500
500
#8C76DA
oklch(63% 0.147 291.7)
-
Step 600
600
#775DC8
oklch(55.7% 0.16 291.5)
-
Step 700
700 (this color)
#644BAC
oklch(48.9% 0.149 291.8)
-
Step 800
800
#523F8C
oklch(42.8% 0.123 291.7)
-
Step 900
900
#433670
oklch(37.7% 0.096 291.4)
-
Step 950
950
#272041
oklch(26.9% 0.06 291.6)
#644BAC 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) | #185EAF | 0.092 |
| Deuteranopia (no green cones) | #1E5AAA | 0.088 |
| Tritanopia (no blue cones) | #506074 | 0.121 |
| Achromatopsia (no color) | #5C5C5C | 0.150 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #644BAC
#644BAC
oklch(48.9% 0.149 291.8)
- #626500
#626500
oklch(48.8% 0.108 111.8)
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 #644BAC, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Iris #6258C4 ΔE 0.046
- Bluey Purple #6241C7 ΔE 0.049
- Rebecca Purple #663399 ΔE 0.059
- Slate Blue #6A5ACD ΔE 0.061
- Blue With A Hint Of Purple #533CC6 ΔE 0.063
- Light Indigo #6D5ACF ΔE 0.065
- Blueberry #464196 ΔE 0.067
- Twilight #4E518B ΔE 0.067
Use #644BAC 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.