#581CB9
Closest named color: Chrysanthemum (#560BAD). oklch(42.7% 0.217 291.2), rgb(88, 28, 185).
Aa
White text reads best on this color (9.20:1).
About this color
#581CB9 is a dark, vivid purple. In OKLCH its lightness is 43%, its chroma 0.217 and its hue 291°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Chrysanthemum (#560BAD), ΔE 0.027 away. White text reads best on it, at 9.20:1.
| Hue family | Purples |
| Lightness | dark (43%) |
| Chroma | vivid (0.217) |
| Temperature | in between |
| Nearest name | Chrysanthemum (#560BAD) |
| Black text | 2.28:1 |
| White text | 9.20:1 |
Values
| HEX | #581CB9 |
| RGB | rgb(88, 28, 185) |
| HSL | hsl(263, 74%, 42%) |
| OKLCH | oklch(42.7% 0.217 291.2) |
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 #581CB9 | 9.20:1 | AAA | Lc -94.3 | Preferred for body text |
| Black text on #581CB9 | 2.28:1 | Fails | Lc 14.2 | Not readable |
| #581CB9 text on white | 9.20:1 | AAA | Lc 89.8 | Fine for body text |
| #581CB9 text on black | 2.28:1 | Fails | Lc -12.4 | 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
#F5F4FF
oklch(97.1% 0.015 290.3)
-
Step 100
100
#E9E6FF
oklch(93.5% 0.034 291.2)
-
Step 200
200
#D9D3FF
oklch(88.6% 0.06 291.4)
-
Step 300
300
#C1B5FF
oklch(81% 0.104 291.3)
-
Step 400
400
#A38AFF
oklch(70.7% 0.167 291.4)
-
Step 500
500
#8F66FF
oklch(63% 0.217 291.2)
-
Step 600
600
#7E36FF
oklch(55.5% 0.268 291.1)
-
Step 700
700
#6D18E5
oklch(49.1% 0.263 291.3)
-
Step 800
800 (this color)
#581CB9
oklch(42.7% 0.217 291.2)
-
Step 900
900
#472292
oklch(37.7% 0.17 291)
-
Step 950
950
#291655
oklch(26.9% 0.107 291.3)
#581CB9 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) | #004ABD | 0.113 |
| Deuteranopia (no green cones) | #0044B6 | 0.109 |
| Tritanopia (no blue cones) | #344D6E | 0.170 |
| Achromatopsia (no color) | #484848 | 0.219 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #581CB9
#581CB9
oklch(42.7% 0.217 291.2)
- #525300
#525300
oklch(42.7% 0.094 110.6)
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 #581CB9, closest first.
No curated palette has a color within ΔE 0.04 of #581CB9.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Chrysanthemum #560BAD ΔE 0.027
- Violet Blue #510AC9 ΔE 0.032
- Purple Blue #5D21D0 ΔE 0.039
- Imperial Purple #480CA8 ΔE 0.047
- Grape #7209B7 ΔE 0.054
- Blue With A Hint Of Purple #533CC6 ΔE 0.055
- Blurple #5539CC ΔE 0.055
- Indigo Blue #3A18B1 ΔE 0.059
Use #581CB9 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.