#3F77F4
Closest named color: Clear Blue (#247AFD). oklch(60.1% 0.197 263.5), rgb(63, 119, 244).
Aa
Black text reads best on this color (5.15:1).
About this color
#3F77F4 is a medium-dark, vivid blue. In OKLCH its lightness is 60%, its chroma 0.197 and its hue 263°. Its hue sits on the cool side of the wheel. The nearest named color is Clear Blue (#247AFD), ΔE 0.021 away. Black text reads best on it, at 5.15:1.
| Hue family | Blues |
| Lightness | medium-dark (60%) |
| Chroma | vivid (0.197) |
| Temperature | cool |
| Nearest name | Clear Blue (#247AFD) |
| Black text | 5.15:1 |
| White text | 4.07:1 |
Values
| HEX | #3F77F4 |
| RGB | rgb(63, 119, 244) |
| HSL | hsl(221, 89%, 60%) |
| OKLCH | oklch(60.1% 0.197 263.5) |
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 #3F77F4 | 4.07:1 | AA large text | Lc -72.9 | Content text, not long reading |
| Black text on #3F77F4 | 5.15:1 | AA | Lc 36.6 | Non-text elements, placeholder text |
| #3F77F4 text on white | 4.07:1 | AA large text | Lc 67.4 | Content text, not long reading |
| #3F77F4 text on black | 5.15:1 | AA | Lc -34.2 | 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 500.
-
Step 50
50
#F1F6FE
oklch(97.2% 0.012 259.8)
-
Step 100
100
#E0EAFD
oklch(93.5% 0.028 263.4)
-
Step 200
200
#C7DAFE
oklch(88.6% 0.054 263.2)
-
Step 300
300
#A1C1FF
oklch(81% 0.095 263.3)
-
Step 400
400
#6E9DFF
oklch(70.6% 0.153 263.6)
-
Step 500
500 (this color)
#3F77F4
oklch(60.1% 0.197 263.5)
-
Step 600
600
#2C66EE
oklch(55.6% 0.214 263.5)
-
Step 700
700
#1F53CF
oklch(49% 0.2 263.5)
-
Step 800
800
#1B45A7
oklch(42.6% 0.165 263.4)
-
Step 900
900
#1B3C85
oklch(37.8% 0.129 263.3)
-
Step 950
950
#11244E
oklch(27.1% 0.081 263.6)
#3F77F4 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) | #2387F8 | 0.040 |
| Deuteranopia (no green cones) | #0076F2 | 0.030 |
| Tritanopia (no blue cones) | #0095AA | 0.155 |
| Achromatopsia (no color) | #7E7E7E | 0.197 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3F77F4
#3F77F4
oklch(60.1% 0.197 263.5)
- #A37800
#A37800
oklch(59.9% 0.123 83.4)
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 #3F77F4, closest first.
No curated palette has a color within ΔE 0.04 of #3F77F4.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Clear Blue #247AFD ΔE 0.021
- Cerulean Blue #056EEE ΔE 0.042
- Royal Blue #4169E1 ΔE 0.043
- Cornflower #6A79F7 ΔE 0.048
- Neon Blue #4361EE ΔE 0.052
- Bright Blue #0165FC ΔE 0.059
- Dodger Blue #1E90FF ΔE 0.062
- Soft Blue #6488EA ΔE 0.065
Use #3F77F4 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.