#5B5BC6
Closest named color: Iris (#6258C4). oklch(52.9% 0.163 279.3), rgb(91, 91, 198).
Aa
White text reads best on this color (5.59:1).
About this color
#5B5BC6 is a medium-dark, vivid blue. In OKLCH its lightness is 53%, its chroma 0.163 and its hue 279°. Its hue sits on the cool side of the wheel. The nearest named color is Iris (#6258C4), ΔE 0.012 away. White text reads best on it, at 5.59:1.
| Hue family | Blues |
| Lightness | medium-dark (53%) |
| Chroma | vivid (0.163) |
| Temperature | cool |
| Nearest name | Iris (#6258C4) |
| Black text | 3.75:1 |
| White text | 5.59:1 |
Values
| HEX | #5B5BC6 |
| RGB | rgb(91, 91, 198) |
| HSL | hsl(240, 48%, 57%) |
| OKLCH | oklch(52.9% 0.163 279.3) |
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 #5B5BC6 | 5.59:1 | AA | Lc -82.9 | Fine for body text |
| Black text on #5B5BC6 | 3.75:1 | AA large text | Lc 26.4 | Dividers and decoration only |
| #5B5BC6 text on white | 5.59:1 | AA | Lc 77.7 | Fine for body text |
| #5B5BC6 text on black | 3.75:1 | AA large text | Lc -24.1 | 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 600.
-
Step 50
50
#F4F5FC
oklch(97.1% 0.009 279.7)
-
Step 100
100
#E6E9F8
oklch(93.6% 0.02 276.9)
-
Step 200
200
#D3D7F4
oklch(88.5% 0.04 279.3)
-
Step 300
300
#B6BCF0
oklch(80.8% 0.074 279.5)
-
Step 400
400
#9198E8
oklch(70.6% 0.117 279.1)
-
Step 500
500
#787DE1
oklch(63.2% 0.148 279.1)
-
Step 600
600 (this color)
#5B5BC6
oklch(52.9% 0.163 279.3)
-
Step 700
700
#5252B3
oklch(49.1% 0.15 279.3)
-
Step 800
800
#434391
oklch(42.6% 0.125 279.7)
-
Step 900
900
#383A74
oklch(37.8% 0.097 279.2)
-
Step 950
950
#212244
oklch(27% 0.062 280.1)
#5B5BC6 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) | #1A6CCA | 0.068 |
| Deuteranopia (no green cones) | #0064C4 | 0.072 |
| Tritanopia (no blue cones) | #297388 | 0.140 |
| Achromatopsia (no color) | #686868 | 0.163 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #5B5BC6
#5B5BC6
oklch(52.9% 0.163 279.3)
- #7B6C00
#7B6C00
oklch(52.9% 0.11 99.7)
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 #5B5BC6, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Iris #6258C4 ΔE 0.012
- Slate Blue #6A5ACD ΔE 0.025
- Dark Periwinkle #665FD1 ΔE 0.026
- Light Indigo #6D5ACF ΔE 0.031
- Warm Blue #4B57DB ΔE 0.041
- Royal Blue #4169E1 ΔE 0.056
- Bluey Purple #6241C7 ΔE 0.057
- French Blue #436BAD ΔE 0.067
Use #5B5BC6 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.