#4973EC
Closest named color: Royal Blue (#4169E1). oklch(59.1% 0.188 266.3), rgb(73, 115, 236).
Aa
Black text reads best on this color (4.94:1).
About this color
#4973EC is a medium-dark, vivid blue. In OKLCH its lightness is 59%, its chroma 0.188 and its hue 266°. Its hue sits on the cool side of the wheel. The nearest named color is Royal Blue (#4169E1), ΔE 0.031 away. Black text reads best on it, at 4.94:1.
| Hue family | Blues |
| Lightness | medium-dark (59%) |
| Chroma | vivid (0.188) |
| Temperature | cool |
| Nearest name | Royal Blue (#4169E1) |
| Black text | 4.94:1 |
| White text | 4.24:1 |
Values
| HEX | #4973EC |
| RGB | rgb(73, 115, 236) |
| HSL | hsl(225, 81%, 61%) |
| OKLCH | oklch(59.1% 0.188 266.3) |
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 #4973EC | 4.24:1 | AA large text | Lc -74.4 | Content text, not long reading |
| Black text on #4973EC | 4.94:1 | AA | Lc 35.2 | Non-text elements, placeholder text |
| #4973EC text on white | 4.24:1 | AA large text | Lc 68.9 | Content text, not long reading |
| #4973EC text on black | 4.94:1 | AA | Lc -32.7 | 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
#E2EAFB
oklch(93.6% 0.025 265.6)
-
Step 200
200
#CBD9F9
oklch(88.5% 0.047 266.7)
-
Step 300
300
#A7C0F8
oklch(80.9% 0.084 265.9)
-
Step 400
400
#799DF5
oklch(70.7% 0.135 266.2)
-
Step 500
500
#5882F1
oklch(63.2% 0.173 266)
-
Step 600
600 (this color)
#4973EC
oklch(59.1% 0.188 266.3)
-
Step 700
700
#3255C2
oklch(49% 0.175 266.4)
-
Step 800
800
#2A479D
oklch(42.8% 0.144 266.3)
-
Step 900
900
#253C7D
oklch(37.6% 0.114 266.3)
-
Step 950
950
#162449
oklch(27% 0.071 266.2)
#4973EC 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) | #2583F0 | 0.043 |
| Deuteranopia (no green cones) | #0074EA | 0.039 |
| Tritanopia (no blue cones) | #0090A5 | 0.152 |
| Achromatopsia (no color) | #7B7B7B | 0.189 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #4973EC
#4973EC
oklch(59.1% 0.188 266.3)
- #9D7700
#9D7700
oklch(59% 0.121 86.2)
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 #4973EC, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Royal Blue #4169E1 ΔE 0.031
- Clear Blue #247AFD ΔE 0.036
- Cerulean Blue #056EEE ΔE 0.043
- Neon Blue #4361EE ΔE 0.045
- Cornflower #6A79F7 ΔE 0.046
- Bright Blue #0165FC ΔE 0.063
- Medium Slate Blue #7B68EE ΔE 0.065
- Dark Periwinkle #665FD1 ΔE 0.065
Use #4973EC 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.