#5773DB
Closest named color: Royal Blue (#4169E1). oklch(58.7% 0.161 269.6), rgb(87, 115, 219).
Aa
Black text reads best on this color (4.88:1).
About this color
#5773DB is a medium-dark, vivid blue. In OKLCH its lightness is 59%, its chroma 0.161 and its hue 270°. Its hue sits on the cool side of the wheel. The nearest named color is Royal Blue (#4169E1), ΔE 0.039 away. Black text reads best on it, at 4.88:1.
| Hue family | Blues |
| Lightness | medium-dark (59%) |
| Chroma | vivid (0.161) |
| Temperature | cool |
| Nearest name | Royal Blue (#4169E1) |
| Black text | 4.88:1 |
| White text | 4.30:1 |
Values
| HEX | #5773DB |
| RGB | rgb(87, 115, 219) |
| HSL | hsl(227, 65%, 60%) |
| OKLCH | oklch(58.7% 0.161 269.6) |
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 #5773DB | 4.30:1 | AA large text | Lc -75.0 | Content text, not long reading |
| Black text on #5773DB | 4.88:1 | AA | Lc 34.6 | Non-text elements, placeholder text |
| #5773DB text on white | 4.30:1 | AA large text | Lc 69.5 | Content text, not long reading |
| #5773DB text on black | 4.88:1 | AA | Lc -32.2 | 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
#CED9F5
oklch(88.6% 0.04 268.5)
-
Step 300
300
#AEBFF1
oklch(80.9% 0.073 270.1)
-
Step 400
400
#849DE9
oklch(70.8% 0.115 269.4)
-
Step 500
500
#6682E3
oklch(63.1% 0.149 269.6)
-
Step 600
600 (this color)
#5773DB
oklch(58.7% 0.161 269.6)
-
Step 700
700
#4057B5
oklch(49.1% 0.151 269.7)
-
Step 800
800
#354892
oklch(42.7% 0.124 269.7)
-
Step 900
900
#2D3D75
oklch(37.7% 0.098 269.3)
-
Step 950
950
#1B2444
oklch(27% 0.061 270.1)
#5773DB 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) | #3F80DF | 0.037 |
| Deuteranopia (no green cones) | #2874D9 | 0.042 |
| Tritanopia (no blue cones) | #008B9C | 0.141 |
| Achromatopsia (no color) | #7A7A7A | 0.162 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #5773DB
#5773DB
oklch(58.7% 0.161 269.6)
- #987800
#987800
oklch(58.7% 0.12 90)
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 #5773DB, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Royal Blue #4169E1 ΔE 0.039
- Dark Periwinkle #665FD1 ΔE 0.051
- Cornflower #6A79F7 ΔE 0.051
- Windows Blue #3778BF ΔE 0.058
- Soft Blue #6488EA ΔE 0.060
- Neon Blue #4361EE ΔE 0.061
- Medium Slate Blue #7B68EE ΔE 0.061
- Clear Blue #247AFD ΔE 0.063
Use #5773DB 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.