#4B73EE
Closest named color: Royal Blue (#4169E1). oklch(59.4% 0.191 266.9), rgb(75, 115, 238).
Aa
Black text reads best on this color (4.98:1).
About this color
#4B73EE is a medium-dark, vivid blue. In OKLCH its lightness is 59%, its chroma 0.191 and its hue 267°. Its hue sits on the cool side of the wheel. The nearest named color is Royal Blue (#4169E1), ΔE 0.034 away. Black text reads best on it, at 4.98:1.
| Hue family | Blues |
| Lightness | medium-dark (59%) |
| Chroma | vivid (0.191) |
| Temperature | cool |
| Nearest name | Royal Blue (#4169E1) |
| Black text | 4.98:1 |
| White text | 4.21:1 |
Values
| HEX | #4B73EE |
| RGB | rgb(75, 115, 238) |
| HSL | hsl(225, 83%, 61%) |
| OKLCH | oklch(59.4% 0.191 266.9) |
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 #4B73EE | 4.21:1 | AA large text | Lc -74.1 | Content text, not long reading |
| Black text on #4B73EE | 4.98:1 | AA | Lc 35.4 | Non-text elements, placeholder text |
| #4B73EE text on white | 4.21:1 | AA large text | Lc 68.6 | Content text, not long reading |
| #4B73EE text on black | 4.98:1 | AA | Lc -33.0 | 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 500.
-
Step 50
50
#F2F5FE
oklch(97% 0.012 271.3)
-
Step 100
100
#E2EAFD
oklch(93.7% 0.027 267.5)
-
Step 200
200
#CAD9FC
oklch(88.5% 0.051 267)
-
Step 300
300
#A5BFFE
oklch(80.8% 0.094 267)
-
Step 400
400
#769CFD
oklch(70.8% 0.148 266.5)
-
Step 500
500 (this color)
#4B73EE
oklch(59.4% 0.191 266.9)
-
Step 600
600
#3D64EA
oklch(55.5% 0.207 267)
-
Step 700
700
#3052CC
oklch(49.1% 0.193 266.9)
-
Step 800
800
#2844A5
oklch(42.7% 0.16 267)
-
Step 900
900
#243B83
oklch(37.8% 0.124 266.9)
-
Step 950
950
#15234C
oklch(27% 0.078 266.9)
#4B73EE 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) | #2283F2 | 0.044 |
| Deuteranopia (no green cones) | #0074EC | 0.041 |
| Tritanopia (no blue cones) | #0090A5 | 0.155 |
| Achromatopsia (no color) | #7B7B7B | 0.191 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #4B73EE
#4B73EE
oklch(59.4% 0.191 266.9)
- #9D7800
#9D7800
oklch(59.3% 0.121 86.9)
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 #4B73EE, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Royal Blue #4169E1 ΔE 0.034
- Clear Blue #247AFD ΔE 0.035
- Cornflower #6A79F7 ΔE 0.043
- Neon Blue #4361EE ΔE 0.045
- Cerulean Blue #056EEE ΔE 0.045
- Bright Blue #0165FC ΔE 0.063
- Medium Slate Blue #7B68EE ΔE 0.063
- Soft Blue #6488EA ΔE 0.065
Use #4B73EE 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.