#4D73E1
Closest named color: Royal Blue (#4169E1). oklch(58.5% 0.173 266.7), rgb(77, 115, 225).
Aa
Black text reads best on this color (4.85:1).
About this color
#4D73E1 is a medium-dark, vivid blue. In OKLCH its lightness is 59%, its chroma 0.173 and its hue 267°. Its hue sits on the cool side of the wheel. The nearest named color is Royal Blue (#4169E1), ΔE 0.030 away. Black text reads best on it, at 4.85:1.
| Hue family | Blues |
| Lightness | medium-dark (59%) |
| Chroma | vivid (0.173) |
| Temperature | cool |
| Nearest name | Royal Blue (#4169E1) |
| Black text | 4.85:1 |
| White text | 4.32:1 |
Values
| HEX | #4D73E1 |
| RGB | rgb(77, 115, 225) |
| HSL | hsl(225, 71%, 59%) |
| OKLCH | oklch(58.5% 0.173 266.7) |
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 #4D73E1 | 4.32:1 | AA large text | Lc -75.1 | Fine for body text |
| Black text on #4D73E1 | 4.85:1 | AA | Lc 34.5 | Non-text elements, placeholder text |
| #4D73E1 text on white | 4.32:1 | AA large text | Lc 69.6 | Content text, not long reading |
| #4D73E1 text on black | 4.85:1 | AA | Lc -32.1 | 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
#F2F5FD
oklch(97% 0.011 269.6)
-
Step 100
100
#E3EAF9
oklch(93.6% 0.022 265.8)
-
Step 200
200
#CCD9F7
oklch(88.5% 0.044 266.9)
-
Step 300
300
#AAC0F4
oklch(80.9% 0.078 266.8)
-
Step 400
400
#7D9DEE
oklch(70.6% 0.124 266.8)
-
Step 500
500
#5D83E9
oklch(63.1% 0.159 266.5)
-
Step 600
600 (this color)
#4D73E1
oklch(58.5% 0.173 266.7)
-
Step 700
700
#3757BA
oklch(49% 0.161 266.8)
-
Step 800
800
#2E4897
oklch(42.7% 0.133 266.9)
-
Step 900
900
#283D78
oklch(37.6% 0.104 266.7)
-
Step 950
950
#182446
oklch(26.9% 0.065 267.3)
#4D73E1 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) | #3681E5 | 0.037 |
| Deuteranopia (no green cones) | #0A73DF | 0.042 |
| Tritanopia (no blue cones) | #008D9F | 0.144 |
| Achromatopsia (no color) | #797979 | 0.173 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #4D73E1
#4D73E1
oklch(58.5% 0.173 266.7)
- #9B7600
#9B7600
oklch(58.6% 0.12 86.6)
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 #4D73E1, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Royal Blue #4169E1 ΔE 0.030
- Clear Blue #247AFD ΔE 0.050
- Cerulean Blue #056EEE ΔE 0.051
- Cornflower #6A79F7 ΔE 0.052
- Neon Blue #4361EE ΔE 0.052
- Dark Periwinkle #665FD1 ΔE 0.057
- Windows Blue #3778BF ΔE 0.060
- Soft Blue #6488EA ΔE 0.064
Use #4D73E1 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.