#5B6ADB
Closest named color: Dark Periwinkle (#665FD1). oklch(57.2% 0.172 274), rgb(91, 106, 219).
Aa
White text reads best on this color (4.63:1).
About this color
#5B6ADB is a medium-dark, vivid blue. In OKLCH its lightness is 57%, its chroma 0.172 and its hue 274°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Periwinkle (#665FD1), ΔE 0.031 away. White text reads best on it, at 4.63:1.
| Hue family | Blues |
| Lightness | medium-dark (57%) |
| Chroma | vivid (0.172) |
| Temperature | cool |
| Nearest name | Dark Periwinkle (#665FD1) |
| Black text | 4.52:1 |
| White text | 4.63:1 |
Values
| HEX | #5B6ADB |
| RGB | rgb(91, 106, 219) |
| HSL | hsl(233, 64%, 61%) |
| OKLCH | oklch(57.2% 0.172 274) |
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 #5B6ADB | 4.63:1 | AA | Lc -77.4 | Fine for body text |
| Black text on #5B6ADB | 4.52:1 | AA | Lc 32.2 | Non-text elements, placeholder text |
| #5B6ADB text on white | 4.63:1 | AA | Lc 71.9 | Content text, not long reading |
| #5B6ADB text on black | 4.52:1 | AA | Lc -29.8 | 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
#F3F5FD
oklch(97.1% 0.011 274.9)
-
Step 100
100
#E5E9F9
oklch(93.6% 0.022 274.7)
-
Step 200
200
#D0D8F6
oklch(88.6% 0.042 273.7)
-
Step 300
300
#B1BEF3
oklch(81% 0.076 273.9)
-
Step 400
400
#899AED
oklch(70.7% 0.123 274)
-
Step 500
500
#6D7EE8
oklch(63% 0.159 274.1)
-
Step 600
600 (this color)
#5B6ADB
oklch(57.2% 0.172 274)
-
Step 700
700
#4753B9
oklch(49% 0.16 273.9)
-
Step 800
800
#3A4596
oklch(42.7% 0.132 273.6)
-
Step 900
900
#323B77
oklch(37.8% 0.102 274.1)
-
Step 950
950
#1D2346
oklch(27.1% 0.065 273.9)
#5B6ADB 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) | #297ADF | 0.055 |
| Deuteranopia (no green cones) | #036FD9 | 0.062 |
| Tritanopia (no blue cones) | #008498 | 0.151 |
| Achromatopsia (no color) | #757575 | 0.172 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #5B6ADB
#5B6ADB
oklch(57.2% 0.172 274)
- #8F7600
#8F7600
oklch(57.3% 0.117 94.1)
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 #5B6ADB, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Periwinkle #665FD1 ΔE 0.031
- Royal Blue #4169E1 ΔE 0.031
- Slate Blue #6A5ACD ΔE 0.044
- Light Indigo #6D5ACF ΔE 0.045
- Neon Blue #4361EE ΔE 0.048
- Warm Blue #4B57DB ΔE 0.053
- Iris #6258C4 ΔE 0.053
- Medium Slate Blue #7B68EE ΔE 0.054
Use #5B6ADB 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.