#3F76E9
Closest named color: Clear Blue (#247AFD). oklch(59.1% 0.184 262.8), rgb(63, 118, 233).
Aa
Black text reads best on this color (4.97:1).
About this color
#3F76E9 is a medium-dark, vivid blue. In OKLCH its lightness is 59%, its chroma 0.184 and its hue 263°. Its hue sits on the cool side of the wheel. The nearest named color is Clear Blue (#247AFD), ΔE 0.033 away. Black text reads best on it, at 4.97:1.
| Hue family | Blues |
| Lightness | medium-dark (59%) |
| Chroma | vivid (0.184) |
| Temperature | cool |
| Nearest name | Clear Blue (#247AFD) |
| Black text | 4.97:1 |
| White text | 4.21:1 |
Values
| HEX | #3F76E9 |
| RGB | rgb(63, 118, 233) |
| HSL | hsl(221, 79%, 58%) |
| OKLCH | oklch(59.1% 0.184 262.8) |
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 #3F76E9 | 4.21:1 | AA large text | Lc -74.2 | Content text, not long reading |
| Black text on #3F76E9 | 4.97:1 | AA | Lc 35.4 | Non-text elements, placeholder text |
| #3F76E9 text on white | 4.21:1 | AA large text | Lc 68.7 | Content text, not long reading |
| #3F76E9 text on black | 4.97:1 | 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 600.
-
Step 50
50
#F1F6FD
oklch(97.1% 0.011 256.7)
-
Step 100
100
#E1EAFA
oklch(93.5% 0.024 262.1)
-
Step 200
200
#C9DAF8
oklch(88.5% 0.045 261.9)
-
Step 300
300
#A4C1F7
oklch(80.9% 0.083 262.6)
-
Step 400
400
#749FF3
oklch(70.7% 0.132 262.8)
-
Step 500
500
#5084EE
oklch(63% 0.169 262.8)
-
Step 600
600 (this color)
#3F76E9
oklch(59.1% 0.184 262.8)
-
Step 700
700
#2858C0
oklch(49% 0.172 263)
-
Step 800
800
#22499B
oklch(42.7% 0.141 262.8)
-
Step 900
900
#203E7B
oklch(37.7% 0.11 262.6)
-
Step 950
950
#132548
oklch(27% 0.069 262.3)
#3F76E9 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) | #3284ED | 0.035 |
| Deuteranopia (no green cones) | #0074E7 | 0.031 |
| Tritanopia (no blue cones) | #0091A4 | 0.145 |
| Achromatopsia (no color) | #7B7B7B | 0.184 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3F76E9
#3F76E9
oklch(59.1% 0.184 262.8)
- #A07500
#A07500
oklch(59% 0.121 82.8)
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 #3F76E9, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Clear Blue #247AFD ΔE 0.033
- Royal Blue #4169E1 ΔE 0.033
- Cerulean Blue #056EEE ΔE 0.040
- Neon Blue #4361EE ΔE 0.051
- Cornflower #6A79F7 ΔE 0.053
- Bright Blue #0165FC ΔE 0.063
- Soft Blue #6488EA ΔE 0.065
- Dark Sky Blue #448EE4 ΔE 0.066
Use #3F76E9 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.