#5B75DA
Closest named color: Royal Blue (#4169E1). oklch(59.2% 0.156 270.2), rgb(91, 117, 218).
Aa
Black text reads best on this color (5.00:1).
About this color
#5B75DA is a medium-dark, vivid blue. In OKLCH its lightness is 59%, its chroma 0.156 and its hue 270°. Its hue sits on the cool side of the wheel. The nearest named color is Royal Blue (#4169E1), ΔE 0.047 away. Black text reads best on it, at 5.00:1.
| Hue family | Blues |
| Lightness | medium-dark (59%) |
| Chroma | vivid (0.156) |
| Temperature | cool |
| Nearest name | Royal Blue (#4169E1) |
| Black text | 5.00:1 |
| White text | 4.19:1 |
Values
| HEX | #5B75DA |
| RGB | rgb(91, 117, 218) |
| HSL | hsl(228, 63%, 61%) |
| OKLCH | oklch(59.2% 0.156 270.2) |
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 #5B75DA | 4.19:1 | AA large text | Lc -74.2 | Content text, not long reading |
| Black text on #5B75DA | 5.00:1 | AA | Lc 35.4 | Non-text elements, placeholder text |
| #5B75DA text on white | 4.19:1 | AA large text | Lc 68.7 | Content text, not long reading |
| #5B75DA text on black | 5.00:1 | AA | Lc -32.9 | 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
#E4EAF8
oklch(93.7% 0.02 267.3)
-
Step 200
200
#CFD9F4
oklch(88.6% 0.039 269.4)
-
Step 300
300
#AFBFEF
oklch(80.9% 0.07 270.4)
-
Step 400
400
#859DE7
oklch(70.7% 0.112 269.7)
-
Step 500
500
#6882E0
oklch(63% 0.144 270.2)
-
Step 600
600 (this color)
#5B75DA
oklch(59.2% 0.156 270.2)
-
Step 700
700
#4258B2
oklch(49.2% 0.145 270)
-
Step 800
800
#364890
oklch(42.7% 0.12 270.1)
-
Step 900
900
#2F3D73
oklch(37.7% 0.094 270.4)
-
Step 950
950
#1B2443
oklch(26.9% 0.059 269.9)
#5B75DA 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) | #4582DE | 0.037 |
| Deuteranopia (no green cones) | #3276D8 | 0.039 |
| Tritanopia (no blue cones) | #008C9D | 0.138 |
| Achromatopsia (no color) | #7C7C7C | 0.156 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #5B75DA
#5B75DA
oklch(59.2% 0.156 270.2)
- #9A7A00
#9A7A00
oklch(59.3% 0.121 90.3)
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 #5B75DA, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Royal Blue #4169E1 ΔE 0.047
- Cornflower #6A79F7 ΔE 0.049
- Soft Blue #6488EA ΔE 0.054
- Dark Periwinkle #665FD1 ΔE 0.054
- Windows Blue #3778BF ΔE 0.058
- Medium Slate Blue #7B68EE ΔE 0.061
- Dark Sky Blue #448EE4 ΔE 0.065
- Clear Blue #247AFD ΔE 0.066
Use #5B75DA 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.