#4B75DD
Closest named color: Royal Blue (#4169E1). oklch(58.6% 0.165 265.1), rgb(75, 117, 221).
Aa
Black text reads best on this color (4.88:1).
About this color
#4B75DD is a medium-dark, vivid blue. In OKLCH its lightness is 59%, its chroma 0.165 and its hue 265°. Its hue sits on the cool side of the wheel. The nearest named color is Royal Blue (#4169E1), ΔE 0.035 away. Black text reads best on it, at 4.88:1.
| Hue family | Blues |
| Lightness | medium-dark (59%) |
| Chroma | vivid (0.165) |
| Temperature | cool |
| Nearest name | Royal Blue (#4169E1) |
| Black text | 4.88:1 |
| White text | 4.29:1 |
Values
| HEX | #4B75DD |
| RGB | rgb(75, 117, 221) |
| HSL | hsl(223, 68%, 58%) |
| OKLCH | oklch(58.6% 0.165 265.1) |
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 #4B75DD | 4.29:1 | AA large text | Lc -74.9 | Content text, not long reading |
| Black text on #4B75DD | 4.88:1 | AA | Lc 34.7 | Non-text elements, placeholder text |
| #4B75DD text on white | 4.29:1 | AA large text | Lc 69.4 | Content text, not long reading |
| #4B75DD text on black | 4.88:1 | AA | Lc -32.3 | 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
#CCD9F5
oklch(88.4% 0.041 265.7)
-
Step 300
300
#A9C0F2
oklch(80.8% 0.075 265.5)
-
Step 400
400
#7C9EEB
oklch(70.6% 0.12 265.3)
-
Step 500
500
#5C84E5
oklch(63% 0.153 265.4)
-
Step 600
600 (this color)
#4B75DD
oklch(58.6% 0.165 265.1)
-
Step 700
700
#3559B7
oklch(49.1% 0.155 265.3)
-
Step 800
800
#2C4994
oklch(42.6% 0.128 265.4)
-
Step 900
900
#273E76
oklch(37.7% 0.1 265.2)
-
Step 950
950
#172545
oklch(27% 0.063 264.7)
#4B75DD 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) | #3F81E1 | 0.031 |
| Deuteranopia (no green cones) | #2074DB | 0.033 |
| Tritanopia (no blue cones) | #008D9E | 0.137 |
| Achromatopsia (no color) | #7A7A7A | 0.166 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #4B75DD
#4B75DD
oklch(58.6% 0.165 265.1)
- #9C7500
#9C7500
oklch(58.5% 0.12 85.2)
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 #4B75DD, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Royal Blue #4169E1 ΔE 0.035
- Windows Blue #3778BF ΔE 0.053
- Clear Blue #247AFD ΔE 0.053
- Cerulean Blue #056EEE ΔE 0.054
- Cornflower #6A79F7 ΔE 0.056
- Neon Blue #4361EE ΔE 0.059
- Dark Periwinkle #665FD1 ΔE 0.060
- Soft Blue #6488EA ΔE 0.062
Use #4B75DD 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.