#5B5CB4
Closest named color: Iris (#6258C4). oklch(51.8% 0.136 280.1), rgb(91, 92, 180).
Aa
White text reads best on this color (5.77:1).
About this color
#5B5CB4 is a medium-dark, moderately saturated purple. In OKLCH its lightness is 52%, its chroma 0.136 and its hue 280°. Its hue sits on the cool side of the wheel. The nearest named color is Iris (#6258C4), ΔE 0.030 away. White text reads best on it, at 5.77:1.
| Hue family | Purples |
| Lightness | medium-dark (52%) |
| Chroma | moderately saturated (0.136) |
| Temperature | cool |
| Nearest name | Iris (#6258C4) |
| Black text | 3.63:1 |
| White text | 5.77:1 |
Values
| HEX | #5B5CB4 |
| RGB | rgb(91, 92, 180) |
| HSL | hsl(239, 37%, 53%) |
| OKLCH | oklch(51.8% 0.136 280.1) |
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 #5B5CB4 | 5.77:1 | AA | Lc -84.0 | Fine for body text |
| Black text on #5B5CB4 | 3.63:1 | AA large text | Lc 25.4 | Dividers and decoration only |
| #5B5CB4 text on white | 5.77:1 | AA | Lc 78.7 | Fine for body text |
| #5B5CB4 text on black | 3.63:1 | AA large text | Lc -23.1 | 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
#F4F5FB
oklch(97.1% 0.008 278.6)
-
Step 100
100
#E7E9F7
oklch(93.7% 0.019 279.5)
-
Step 200
200
#D4D7F2
oklch(88.5% 0.037 280.6)
-
Step 300
300
#B8BDEB
oklch(81% 0.065 280)
-
Step 400
400
#9499E1
oklch(70.7% 0.105 280.3)
-
Step 500
500
#7B7ED9
oklch(63.1% 0.135 280.3)
-
Step 600
600
#6566C6
oklch(55.7% 0.146 280.1)
-
Step 700
700 (this color)
#5B5CB4
oklch(51.8% 0.136 280.1)
-
Step 800
800
#44458B
oklch(42.7% 0.113 279.8)
-
Step 900
900
#393B6F
oklch(37.8% 0.088 279.7)
-
Step 950
950
#212341
oklch(27% 0.055 279.1)
#5B5CB4 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) | #3569B7 | 0.051 |
| Deuteranopia (no green cones) | #2D62B2 | 0.053 |
| Tritanopia (no blue cones) | #396F7F | 0.119 |
| Achromatopsia (no color) | #666666 | 0.136 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #5B5CB4
#5B5CB4
oklch(51.8% 0.136 280.1)
- #776900
#776900
oklch(51.8% 0.108 100.1)
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 #5B5CB4, closest first.
No curated palette has a color within ΔE 0.04 of #5B5CB4.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Iris #6258C4 ΔE 0.030
- Slate Blue #6A5ACD ΔE 0.046
- Dark Periwinkle #665FD1 ΔE 0.048
- French Blue #436BAD ΔE 0.050
- Light Indigo #6D5ACF ΔE 0.051
- Dusky Blue #475F94 ΔE 0.061
- Mid Blue #276AB3 ΔE 0.062
- Warm Blue #4B57DB ΔE 0.067
Use #5B5CB4 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.