#5B51B2
Closest named color: Iris (#6258C4). oklch(49.6% 0.149 284.2), rgb(91, 81, 178).
Aa
White text reads best on this color (6.43:1).
About this color
#5B51B2 is a medium-dark, vivid purple. In OKLCH its lightness is 50%, its chroma 0.149 and its hue 284°. Its hue sits on the cool side of the wheel. The nearest named color is Iris (#6258C4), ΔE 0.034 away. White text reads best on it, at 6.43:1.
| Hue family | Purples |
| Lightness | medium-dark (50%) |
| Chroma | vivid (0.149) |
| Temperature | cool |
| Nearest name | Iris (#6258C4) |
| Black text | 3.26:1 |
| White text | 6.43:1 |
Values
| HEX | #5B51B2 |
| RGB | rgb(91, 81, 178) |
| HSL | hsl(246, 39%, 51%) |
| OKLCH | oklch(49.6% 0.149 284.2) |
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 #5B51B2 | 6.43:1 | AA | Lc -86.8 | Fine for body text |
| Black text on #5B51B2 | 3.26:1 | AA large text | Lc 22.4 | Dividers and decoration only |
| #5B51B2 text on white | 6.43:1 | AA | Lc 81.7 | Fine for body text |
| #5B51B2 text on black | 3.26:1 | AA large text | Lc -20.2 | 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
#F4F5FC
oklch(97.1% 0.009 279.7)
-
Step 100
100
#E8E8F8
oklch(93.6% 0.022 286)
-
Step 200
200
#D5D6F3
oklch(88.4% 0.04 284)
-
Step 300
300
#BABBEE
oklch(80.9% 0.072 283.8)
-
Step 400
400
#9896E6
oklch(70.7% 0.116 284.2)
-
Step 500
500
#817ADE
oklch(63.1% 0.147 284.5)
-
Step 600
600
#6B61CC
oklch(55.6% 0.16 284.1)
-
Step 700
700 (this color)
#5B51B2
oklch(49.6% 0.149 284.2)
-
Step 800
800
#49428F
oklch(42.8% 0.123 284)
-
Step 900
900
#3D3872
oklch(37.7% 0.096 284.7)
-
Step 950
950
#232143
oklch(26.9% 0.062 284.1)
#5B51B2 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) | #1C62B5 | 0.073 |
| Deuteranopia (no green cones) | #155BB0 | 0.074 |
| Tritanopia (no blue cones) | #3C6679 | 0.126 |
| Achromatopsia (no color) | #5F5F5F | 0.149 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #5B51B2
#5B51B2
oklch(49.6% 0.149 284.2)
- #6C6400
#6C6400
oklch(49.5% 0.105 104.1)
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 #5B51B2, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Iris #6258C4 ΔE 0.034
- Bluey Purple #6241C7 ΔE 0.050
- Slate Blue #6A5ACD ΔE 0.053
- Light Indigo #6D5ACF ΔE 0.058
- Blue With A Hint Of Purple #533CC6 ΔE 0.060
- Dark Periwinkle #665FD1 ΔE 0.060
- Twilight #4E518B ΔE 0.067
- Warm Blue #4B57DB ΔE 0.068
Use #5B51B2 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.