#586FDB
Closest named color: Royal Blue (#4169E1). oklch(57.9% 0.166 271.3), rgb(88, 111, 219).
Aa
Black text reads best on this color (4.71:1).
About this color
#586FDB is a medium-dark, vivid blue. In OKLCH its lightness is 58%, its chroma 0.166 and its hue 271°. Its hue sits on the cool side of the wheel. The nearest named color is Royal Blue (#4169E1), ΔE 0.033 away. Black text reads best on it, at 4.71:1.
| Hue family | Blues |
| Lightness | medium-dark (58%) |
| Chroma | vivid (0.166) |
| Temperature | cool |
| Nearest name | Royal Blue (#4169E1) |
| Black text | 4.71:1 |
| White text | 4.45:1 |
Values
| HEX | #586FDB |
| RGB | rgb(88, 111, 219) |
| HSL | hsl(229, 65%, 60%) |
| OKLCH | oklch(57.9% 0.166 271.3) |
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 #586FDB | 4.45:1 | AA large text | Lc -76.1 | Fine for body text |
| Black text on #586FDB | 4.71:1 | AA | Lc 33.4 | Non-text elements, placeholder text |
| #586FDB text on white | 4.45:1 | AA large text | Lc 70.7 | Content text, not long reading |
| #586FDB text on black | 4.71:1 | AA | Lc -31.0 | Non-text elements, placeholder text |
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
#F3F5FC
oklch(97.1% 0.01 273.4)
-
Step 100
100
#E4E9F9
oklch(93.5% 0.022 272.1)
-
Step 200
200
#CFD8F5
oklch(88.4% 0.041 271.9)
-
Step 300
300
#AFBFF2
oklch(81% 0.074 271.1)
-
Step 400
400
#869CEB
oklch(70.8% 0.119 271.3)
-
Step 500
500
#6981E5
oklch(63.2% 0.152 271.3)
-
Step 600
600 (this color)
#586FDB
oklch(57.9% 0.166 271.3)
-
Step 700
700
#4356B7
oklch(49.2% 0.154 271.3)
-
Step 800
800
#374794
oklch(42.8% 0.127 271.2)
-
Step 900
900
#2F3C76
oklch(37.7% 0.1 271.4)
-
Step 950
950
#1B2445
oklch(27.1% 0.063 270.3)
#586FDB 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) | #367DDF | 0.043 |
| Deuteranopia (no green cones) | #1B72D9 | 0.050 |
| Tritanopia (no blue cones) | #00889B | 0.144 |
| Achromatopsia (no color) | #777777 | 0.166 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #586FDB
#586FDB
oklch(57.9% 0.166 271.3)
- #947700
#947700
oklch(58% 0.119 91.7)
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 #586FDB, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Royal Blue #4169E1 ΔE 0.033
- Dark Periwinkle #665FD1 ΔE 0.042
- Neon Blue #4361EE ΔE 0.054
- Cornflower #6A79F7 ΔE 0.054
- Slate Blue #6A5ACD ΔE 0.055
- Light Indigo #6D5ACF ΔE 0.056
- Medium Slate Blue #7B68EE ΔE 0.058
- Windows Blue #3778BF ΔE 0.062
Use #586FDB 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.