#3F7AF0
Closest named color: Clear Blue (#247AFD). oklch(60.4% 0.188 262.3), rgb(63, 122, 240).
Aa
Black text reads best on this color (5.25:1).
About this color
#3F7AF0 is a medium-dark, vivid blue. In OKLCH its lightness is 60%, its chroma 0.188 and its hue 262°. Its hue sits on the cool side of the wheel. The nearest named color is Clear Blue (#247AFD), ΔE 0.025 away. Black text reads best on it, at 5.25:1.
| Hue family | Blues |
| Lightness | medium-dark (60%) |
| Chroma | vivid (0.188) |
| Temperature | cool |
| Nearest name | Clear Blue (#247AFD) |
| Black text | 5.25:1 |
| White text | 3.99:1 |
Values
| HEX | #3F7AF0 |
| RGB | rgb(63, 122, 240) |
| HSL | hsl(220, 86%, 59%) |
| OKLCH | oklch(60.4% 0.188 262.3) |
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 #3F7AF0 | 3.99:1 | AA large text | Lc -72.3 | Content text, not long reading |
| Black text on #3F7AF0 | 5.25:1 | AA | Lc 37.2 | Non-text elements, placeholder text |
| #3F7AF0 text on white | 3.99:1 | AA large text | Lc 66.8 | Content text, not long reading |
| #3F7AF0 text on black | 5.25:1 | AA | Lc -34.8 | 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
#E0EAFC
oklch(93.5% 0.027 262.3)
-
Step 200
200
#C7DAFC
oklch(88.5% 0.051 262.1)
-
Step 300
300
#A1C1FD
oklch(80.9% 0.092 262.7)
-
Step 400
400
#6D9EFC
oklch(70.6% 0.148 262.4)
-
Step 500
500 (this color)
#3F7AF0
oklch(60.4% 0.188 262.3)
-
Step 600
600
#2A68E9
oklch(55.6% 0.206 262.5)
-
Step 700
700
#1D56CA
oklch(49.1% 0.19 262.3)
-
Step 800
800
#1A47A3
oklch(42.7% 0.157 262.3)
-
Step 900
900
#1B3D82
oklch(37.8% 0.123 262.4)
-
Step 950
950
#10244C
oklch(26.9% 0.079 262.4)
#3F7AF0 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) | #3488F4 | 0.035 |
| Deuteranopia (no green cones) | #0077EE | 0.031 |
| Tritanopia (no blue cones) | #0096AA | 0.148 |
| Achromatopsia (no color) | #7F7F7F | 0.189 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3F7AF0
#3F7AF0
oklch(60.4% 0.188 262.3)
- #A67900
#A67900
oklch(60.5% 0.125 82.4)
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 #3F7AF0, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Clear Blue #247AFD ΔE 0.025
- Royal Blue #4169E1 ΔE 0.046
- Cerulean Blue #056EEE ΔE 0.046
- Cornflower #6A79F7 ΔE 0.047
- Dodger Blue #1E90FF ΔE 0.057
- Soft Blue #6488EA ΔE 0.057
- Dark Sky Blue #448EE4 ΔE 0.059
- Neon Blue #4361EE ΔE 0.059
Use #3F7AF0 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.