#4A73D0
Closest named color: Windows Blue (#3778BF). oklch(57.3% 0.15 264.3), rgb(74, 115, 208).
Aa
Black text reads best on this color (4.65:1).
About this color
#4A73D0 is a medium-dark, vivid blue. In OKLCH its lightness is 57%, its chroma 0.150 and its hue 264°. Its hue sits on the cool side of the wheel. The nearest named color is Windows Blue (#3778BF), ΔE 0.036 away. Black text reads best on it, at 4.65:1.
| Hue family | Blues |
| Lightness | medium-dark (57%) |
| Chroma | vivid (0.150) |
| Temperature | cool |
| Nearest name | Windows Blue (#3778BF) |
| Black text | 4.65:1 |
| White text | 4.51:1 |
Values
| HEX | #4A73D0 |
| RGB | rgb(74, 115, 208) |
| HSL | hsl(222, 59%, 55%) |
| OKLCH | oklch(57.3% 0.15 264.3) |
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 #4A73D0 | 4.51:1 | AA | Lc -76.5 | Fine for body text |
| Black text on #4A73D0 | 4.65:1 | AA | Lc 33.0 | Non-text elements, placeholder text |
| #4A73D0 text on white | 4.51:1 | AA | Lc 71.1 | Content text, not long reading |
| #4A73D0 text on black | 4.65:1 | AA | Lc -30.6 | 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
#E3EAF7
oklch(93.6% 0.019 263)
-
Step 200
200
#CDD9F3
oklch(88.4% 0.038 265.8)
-
Step 300
300
#ABC1ED
oklch(80.9% 0.067 264.1)
-
Step 400
400
#7E9FE4
oklch(70.6% 0.108 264.2)
-
Step 500
500
#5E86DD
oklch(63.1% 0.139 264.2)
-
Step 600
600 (this color)
#4A73D0
oklch(57.3% 0.15 264.3)
-
Step 700
700
#375BAF
oklch(49% 0.14 264.4)
-
Step 800
800
#2E4B8E
oklch(42.7% 0.116 264.4)
-
Step 900
900
#293F71
oklch(37.7% 0.09 264.6)
-
Step 950
950
#182542
oklch(26.9% 0.057 264.6)
#4A73D0 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) | #467DD4 | 0.026 |
| Deuteranopia (no green cones) | #2F71CE | 0.026 |
| Tritanopia (no blue cones) | #008897 | 0.125 |
| Achromatopsia (no color) | #767676 | 0.151 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #4A73D0
#4A73D0
oklch(57.3% 0.15 264.3)
- #987100
#987100
oklch(57.2% 0.117 84.5)
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 #4A73D0, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Windows Blue #3778BF ΔE 0.036
- Royal Blue #4169E1 ΔE 0.040
- French Blue #436BAD ΔE 0.057
- Dark Periwinkle #665FD1 ΔE 0.057
- Water Blue #0E87CC ΔE 0.061
- Mid Blue #276AB3 ΔE 0.061
- Cerulean Blue #056EEE ΔE 0.063
- Flat Blue #3C73A8 ΔE 0.066
Use #4A73D0 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.