#631BAB
Closest named color: Chrysanthemum (#560BAD). oklch(42.6% 0.205 299.7), rgb(99, 27, 171).
Aa
White text reads best on this color (9.22:1).
About this color
#631BAB is a dark, vivid purple. In OKLCH its lightness is 43%, its chroma 0.205 and its hue 300°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Chrysanthemum (#560BAD), ΔE 0.033 away. White text reads best on it, at 9.22:1.
| Hue family | Purples |
| Lightness | dark (43%) |
| Chroma | vivid (0.205) |
| Temperature | in between |
| Nearest name | Chrysanthemum (#560BAD) |
| Black text | 2.27:1 |
| White text | 9.22:1 |
Values
| HEX | #631BAB |
| RGB | rgb(99, 27, 171) |
| HSL | hsl(270, 73%, 39%) |
| OKLCH | oklch(42.6% 0.205 299.7) |
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 #631BAB | 9.22:1 | AAA | Lc -94.4 | Preferred for body text |
| Black text on #631BAB | 2.27:1 | Fails | Lc 14.0 | Not readable |
| #631BAB text on white | 9.22:1 | AAA | Lc 90.0 | Fine for body text |
| #631BAB text on black | 2.27:1 | Fails | Lc -12.3 | Not readable |
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 800.
-
Step 50
50
#F7F3FF
oklch(97.1% 0.016 301.2)
-
Step 100
100
#EDE5FE
oklch(93.6% 0.035 300.3)
-
Step 200
200
#DFD0FF
oklch(88.5% 0.066 299.6)
-
Step 300
300
#CBB0FF
oklch(80.9% 0.113 299.6)
-
Step 400
400
#B282FF
oklch(70.7% 0.18 299.5)
-
Step 500
500
#A259FF
oklch(63.1% 0.235 299.8)
-
Step 600
600
#8F2CF3
oklch(55.5% 0.266 299.6)
-
Step 700
700
#7A19D4
oklch(49% 0.247 299.5)
-
Step 800
800 (this color)
#631BAB
oklch(42.6% 0.205 299.7)
-
Step 900
900
#502188
oklch(37.7% 0.16 299.3)
-
Step 950
950
#2F154F
oklch(26.9% 0.101 300.2)
#631BAB 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) | #0047AF | 0.132 |
| Deuteranopia (no green cones) | #0046A8 | 0.133 |
| Tritanopia (no blue cones) | #514666 | 0.151 |
| Achromatopsia (no color) | #474747 | 0.207 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #631BAB
#631BAB
oklch(42.6% 0.205 299.7)
- #485600
#485600
oklch(42.6% 0.101 120)
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 #631BAB, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Chrysanthemum #560BAD ΔE 0.033
- Grape #7209B7 ΔE 0.035
- Rebecca Purple #663399 ΔE 0.048
- Imperial Purple #480CA8 ΔE 0.060
- Purple Blue #5D21D0 ΔE 0.064
- Violet Blue #510AC9 ΔE 0.065
- Blue With A Hint Of Purple #533CC6 ΔE 0.074
- Blurple #5539CC ΔE 0.076
Use #631BAB 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.