#4F73DC
Closest named color: Royal Blue (#4169E1). oklch(58.3% 0.165 267), rgb(79, 115, 220).
Aa
Black text reads best on this color (4.81:1).
About this color
#4F73DC is a medium-dark, vivid blue. In OKLCH its lightness is 58%, its chroma 0.165 and its hue 267°. Its hue sits on the cool side of the wheel. The nearest named color is Royal Blue (#4169E1), ΔE 0.033 away. Black text reads best on it, at 4.81:1.
| Hue family | Blues |
| Lightness | medium-dark (58%) |
| Chroma | vivid (0.165) |
| Temperature | cool |
| Nearest name | Royal Blue (#4169E1) |
| Black text | 4.81:1 |
| White text | 4.35:1 |
Values
| HEX | #4F73DC |
| RGB | rgb(79, 115, 220) |
| HSL | hsl(225, 67%, 59%) |
| OKLCH | oklch(58.3% 0.165 267) |
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 #4F73DC | 4.35:1 | AA large text | Lc -75.4 | Fine for body text |
| Black text on #4F73DC | 4.81:1 | AA | Lc 34.2 | Non-text elements, placeholder text |
| #4F73DC text on white | 4.35:1 | AA large text | Lc 69.9 | Content text, not long reading |
| #4F73DC text on black | 4.81:1 | AA | Lc -31.8 | 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
#F2F5FC
oklch(97% 0.01 267.4)
-
Step 100
100
#E3EAF9
oklch(93.6% 0.022 265.8)
-
Step 200
200
#CDD9F5
oklch(88.5% 0.041 267.1)
-
Step 300
300
#ABC0F2
oklch(80.9% 0.075 267)
-
Step 400
400
#7F9EEB
oklch(70.8% 0.119 266.7)
-
Step 500
500
#6083E5
oklch(63.1% 0.153 267.2)
-
Step 600
600 (this color)
#4F73DC
oklch(58.3% 0.165 267)
-
Step 700
700
#3958B7
oklch(49.1% 0.155 267)
-
Step 800
800
#2F4994
oklch(42.8% 0.127 266.6)
-
Step 900
900
#2A3E76
oklch(37.8% 0.099 266.9)
-
Step 950
950
#192445
oklch(26.9% 0.063 268.1)
#4F73DC 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) | #3C80E0 | 0.035 |
| Deuteranopia (no green cones) | #1E73DA | 0.038 |
| Tritanopia (no blue cones) | #008B9D | 0.138 |
| Achromatopsia (no color) | #797979 | 0.165 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #4F73DC
#4F73DC
oklch(58.3% 0.165 267)
- #9A7500
#9A7500
oklch(58.3% 0.119 86.4)
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 #4F73DC, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Royal Blue #4169E1 ΔE 0.033
- Dark Periwinkle #665FD1 ΔE 0.054
- Windows Blue #3778BF ΔE 0.054
- Cornflower #6A79F7 ΔE 0.055
- Cerulean Blue #056EEE ΔE 0.056
- Neon Blue #4361EE ΔE 0.056
- Clear Blue #247AFD ΔE 0.057
- Soft Blue #6488EA ΔE 0.064
Use #4F73DC 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.