#5B72D1
Closest named color: Royal Blue (#4169E1). oklch(58.1% 0.148 271), rgb(91, 114, 209).
Aa
Black text reads best on this color (4.77:1).
About this color
#5B72D1 is a medium-dark, vivid blue. In OKLCH its lightness is 58%, its chroma 0.148 and its hue 271°. Its hue sits on the cool side of the wheel. The nearest named color is Royal Blue (#4169E1), ΔE 0.048 away. Black text reads best on it, at 4.77:1.
| Hue family | Blues |
| Lightness | medium-dark (58%) |
| Chroma | vivid (0.148) |
| Temperature | cool |
| Nearest name | Royal Blue (#4169E1) |
| Black text | 4.77:1 |
| White text | 4.40:1 |
Values
| HEX | #5B72D1 |
| RGB | rgb(91, 114, 209) |
| HSL | hsl(228, 56%, 59%) |
| OKLCH | oklch(58.1% 0.148 271) |
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 #5B72D1 | 4.40:1 | AA large text | Lc -75.8 | Fine for body text |
| Black text on #5B72D1 | 4.77:1 | AA | Lc 33.8 | Non-text elements, placeholder text |
| #5B72D1 text on white | 4.40:1 | AA large text | Lc 70.3 | Content text, not long reading |
| #5B72D1 text on black | 4.77:1 | AA | Lc -31.4 | 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
#E5E9F7
oklch(93.5% 0.019 273.2)
-
Step 200
200
#D0D8F2
oklch(88.4% 0.037 272)
-
Step 300
300
#B0BFEC
oklch(80.9% 0.066 270.5)
-
Step 400
400
#889DE3
oklch(70.8% 0.106 270.8)
-
Step 500
500
#6B83DB
oklch(63.1% 0.135 270.6)
-
Step 600
600 (this color)
#5B72D1
oklch(58.1% 0.148 271)
-
Step 700
700
#4558AE
oklch(49.1% 0.138 271.1)
-
Step 800
800
#39498D
oklch(42.9% 0.114 271)
-
Step 900
900
#303D70
oklch(37.6% 0.089 270.9)
-
Step 950
950
#1C2442
oklch(26.9% 0.057 270.9)
#5B72D1 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) | #477ED5 | 0.035 |
| Deuteranopia (no green cones) | #3773CF | 0.037 |
| Tritanopia (no blue cones) | #0E8797 | 0.132 |
| Achromatopsia (no color) | #787878 | 0.148 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #5B72D1
#5B72D1
oklch(58.1% 0.148 271)
- #957700
#957700
oklch(58.1% 0.119 91.1)
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 #5B72D1, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Royal Blue #4169E1 ΔE 0.048
- Dark Periwinkle #665FD1 ΔE 0.048
- Windows Blue #3778BF ΔE 0.050
- Slate Blue #6A5ACD ΔE 0.060
- Light Indigo #6D5ACF ΔE 0.061
- Cornflower #6A79F7 ΔE 0.063
- Iris #6258C4 ΔE 0.065
- French Blue #436BAD ΔE 0.066
Use #5B72D1 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.