#4075E3
Closest named color: Royal Blue (#4169E1). oklch(58.5% 0.177 262.8), rgb(64, 117, 227).
Aa
Black text reads best on this color (4.87:1).
About this color
#4075E3 is a medium-dark, vivid blue. In OKLCH its lightness is 59%, its chroma 0.177 and its hue 263°. Its hue sits on the cool side of the wheel. The nearest named color is Royal Blue (#4169E1), ΔE 0.030 away. Black text reads best on it, at 4.87:1.
| Hue family | Blues |
| Lightness | medium-dark (59%) |
| Chroma | vivid (0.177) |
| Temperature | cool |
| Nearest name | Royal Blue (#4169E1) |
| Black text | 4.87:1 |
| White text | 4.31:1 |
Values
| HEX | #4075E3 |
| RGB | rgb(64, 117, 227) |
| HSL | hsl(220, 74%, 57%) |
| OKLCH | oklch(58.5% 0.177 262.8) |
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 #4075E3 | 4.31:1 | AA large text | Lc -74.9 | Content text, not long reading |
| Black text on #4075E3 | 4.87:1 | AA | Lc 34.7 | Non-text elements, placeholder text |
| #4075E3 text on white | 4.31:1 | AA large text | Lc 69.4 | Content text, not long reading |
| #4075E3 text on black | 4.87:1 | AA | Lc -32.2 | 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
#F2F6FD
oklch(97.2% 0.01 261.8)
-
Step 100
100
#E2EAFA
oklch(93.6% 0.023 264.5)
-
Step 200
200
#CADAF7
oklch(88.5% 0.044 262.4)
-
Step 300
300
#A5C1F5
oklch(80.9% 0.08 262.6)
-
Step 400
400
#769FF0
oklch(70.7% 0.128 263.1)
-
Step 500
500
#5385EB
oklch(63.2% 0.163 262.9)
-
Step 600
600 (this color)
#4075E3
oklch(58.5% 0.177 262.8)
-
Step 700
700
#2B59BC
oklch(49% 0.164 263)
-
Step 800
800
#244A98
oklch(42.8% 0.135 262.6)
-
Step 900
900
#223E79
oklch(37.6% 0.106 263.2)
-
Step 950
950
#142547
oklch(27% 0.067 262.7)
#4075E3 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) | #3782E7 | 0.033 |
| Deuteranopia (no green cones) | #0073E1 | 0.033 |
| Tritanopia (no blue cones) | #008FA1 | 0.141 |
| Achromatopsia (no color) | #7A7A7A | 0.177 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #4075E3
#4075E3
oklch(58.5% 0.177 262.8)
- #9E7400
#9E7400
oklch(58.5% 0.12 83.2)
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 #4075E3, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Royal Blue #4169E1 ΔE 0.030
- Cerulean Blue #056EEE ΔE 0.041
- Clear Blue #247AFD ΔE 0.042
- Neon Blue #4361EE ΔE 0.052
- Cornflower #6A79F7 ΔE 0.058
- Windows Blue #3778BF ΔE 0.058
- Soft Blue #6488EA ΔE 0.067
- Dark Sky Blue #448EE4 ΔE 0.067
Use #4075E3 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.