#3F79EB
Closest named color: Clear Blue (#247AFD). oklch(59.8% 0.183 262.1), rgb(63, 121, 235).
Aa
Black text reads best on this color (5.14:1).
About this color
#3F79EB is a medium-dark, vivid blue. In OKLCH its lightness is 60%, its chroma 0.183 and its hue 262°. Its hue sits on the cool side of the wheel. The nearest named color is Clear Blue (#247AFD), ΔE 0.031 away. Black text reads best on it, at 5.14:1.
| Hue family | Blues |
| Lightness | medium-dark (60%) |
| Chroma | vivid (0.183) |
| Temperature | cool |
| Nearest name | Clear Blue (#247AFD) |
| Black text | 5.14:1 |
| White text | 4.08:1 |
Values
| HEX | #3F79EB |
| RGB | rgb(63, 121, 235) |
| HSL | hsl(220, 81%, 58%) |
| OKLCH | oklch(59.8% 0.183 262.1) |
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 #3F79EB | 4.08:1 | AA large text | Lc -73.1 | Content text, not long reading |
| Black text on #3F79EB | 5.14:1 | AA | Lc 36.5 | Non-text elements, placeholder text |
| #3F79EB text on white | 4.08:1 | AA large text | Lc 67.6 | Content text, not long reading |
| #3F79EB text on black | 5.14:1 | AA | Lc -34.1 | 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
#E1EAFC
oklch(93.6% 0.026 264.4)
-
Step 200
200
#C8DAFB
oklch(88.5% 0.05 262.6)
-
Step 300
300
#A1C1FB
oklch(80.8% 0.09 262.1)
-
Step 400
400
#6F9FF9
oklch(70.8% 0.142 262.1)
-
Step 500
500 (this color)
#3F79EB
oklch(59.8% 0.183 262.1)
-
Step 600
600
#2B69E5
oklch(55.5% 0.199 262.1)
-
Step 700
700
#1F57C7
oklch(49.1% 0.184 262.1)
-
Step 800
800
#1B48A1
oklch(42.7% 0.153 262)
-
Step 900
900
#1C3D80
oklch(37.7% 0.12 262.5)
-
Step 950
950
#11254B
oklch(27.1% 0.075 261.8)
#3F79EB 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) | #3786EF | 0.033 |
| Deuteranopia (no green cones) | #0076E9 | 0.032 |
| Tritanopia (no blue cones) | #0094A7 | 0.144 |
| Achromatopsia (no color) | #7E7E7E | 0.183 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3F79EB
#3F79EB
oklch(59.8% 0.183 262.1)
- #A47700
#A47700
oklch(59.9% 0.123 82.1)
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 #3F79EB, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Clear Blue #247AFD ΔE 0.031
- Royal Blue #4169E1 ΔE 0.041
- Cerulean Blue #056EEE ΔE 0.045
- Cornflower #6A79F7 ΔE 0.050
- Neon Blue #4361EE ΔE 0.058
- Soft Blue #6488EA ΔE 0.058
- Dark Sky Blue #448EE4 ΔE 0.059
- Dodger Blue #1E90FF ΔE 0.061
Use #3F79EB 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.