#5B74DA
Closest named color: Royal Blue (#4169E1). oklch(59% 0.158 270.6), rgb(91, 116, 218).
Aa
Black text reads best on this color (4.95:1).
About this color
#5B74DA is a medium-dark, vivid blue. In OKLCH its lightness is 59%, its chroma 0.158 and its hue 271°. Its hue sits on the cool side of the wheel. The nearest named color is Royal Blue (#4169E1), ΔE 0.045 away. Black text reads best on it, at 4.95:1.
| Hue family | Blues |
| Lightness | medium-dark (59%) |
| Chroma | vivid (0.158) |
| Temperature | cool |
| Nearest name | Royal Blue (#4169E1) |
| Black text | 4.95:1 |
| White text | 4.23:1 |
Values
| HEX | #5B74DA |
| RGB | rgb(91, 116, 218) |
| HSL | hsl(228, 63%, 61%) |
| OKLCH | oklch(59% 0.158 270.6) |
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 #5B74DA | 4.23:1 | AA large text | Lc -74.5 | Content text, not long reading |
| Black text on #5B74DA | 4.95:1 | AA | Lc 35.1 | Non-text elements, placeholder text |
| #5B74DA text on white | 4.23:1 | AA large text | Lc 69.0 | Content text, not long reading |
| #5B74DA text on black | 4.95:1 | AA | Lc -32.6 | 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
#CFD8F4
oklch(88.4% 0.04 271.4)
-
Step 300
300
#AFBFEF
oklch(80.9% 0.07 270.4)
-
Step 400
400
#869CE8
oklch(70.7% 0.114 270.9)
-
Step 500
500
#6982E1
oklch(63.1% 0.146 270.7)
-
Step 600
600 (this color)
#5B74DA
oklch(59% 0.158 270.6)
-
Step 700
700
#4357B3
oklch(49.1% 0.147 270.8)
-
Step 800
800
#374891
oklch(42.8% 0.122 270.6)
-
Step 900
900
#2F3D73
oklch(37.7% 0.094 270.4)
-
Step 950
950
#1B2444
oklch(27% 0.061 270.1)
#5B74DA 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) | #4381DE | 0.038 |
| Deuteranopia (no green cones) | #2F76D8 | 0.041 |
| Tritanopia (no blue cones) | #008B9C | 0.140 |
| Achromatopsia (no color) | #7B7B7B | 0.158 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #5B74DA
#5B74DA
oklch(59% 0.158 270.6)
- #997900
#997900
oklch(59% 0.121 90.1)
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 #5B74DA, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Royal Blue #4169E1 ΔE 0.045
- Cornflower #6A79F7 ΔE 0.049
- Dark Periwinkle #665FD1 ΔE 0.052
- Soft Blue #6488EA ΔE 0.057
- Windows Blue #3778BF ΔE 0.058
- Medium Slate Blue #7B68EE ΔE 0.060
- Slate Blue #6A5ACD ΔE 0.065
- Light Indigo #6D5ACF ΔE 0.065
Use #5B74DA 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.