#3F7BEE
Closest named color: Clear Blue (#247AFD). oklch(60.5% 0.185 261.8), rgb(63, 123, 238).
Aa
Black text reads best on this color (5.27:1).
About this color
#3F7BEE is a medium-dark, vivid blue. In OKLCH its lightness is 60%, its chroma 0.185 and its hue 262°. Its hue sits on the cool side of the wheel. The nearest named color is Clear Blue (#247AFD), ΔE 0.028 away. Black text reads best on it, at 5.27:1.
| Hue family | Blues |
| Lightness | medium-dark (60%) |
| Chroma | vivid (0.185) |
| Temperature | cool |
| Nearest name | Clear Blue (#247AFD) |
| Black text | 5.27:1 |
| White text | 3.97:1 |
Values
| HEX | #3F7BEE |
| RGB | rgb(63, 123, 238) |
| HSL | hsl(219, 84%, 59%) |
| OKLCH | oklch(60.5% 0.185 261.8) |
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 #3F7BEE | 3.97:1 | AA large text | Lc -72.2 | Content text, not long reading |
| Black text on #3F7BEE | 5.27:1 | AA | Lc 37.4 | Non-text elements, placeholder text |
| #3F7BEE text on white | 3.97:1 | AA large text | Lc 66.7 | Content text, not long reading |
| #3F7BEE text on black | 5.27:1 | AA | Lc -35.0 | 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 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
#C7DAFB
oklch(88.5% 0.05 261.5)
-
Step 300
300
#A1C1FC
oklch(80.9% 0.091 262.4)
-
Step 400
400
#6D9FFA
oklch(70.7% 0.144 261.6)
-
Step 500
500 (this color)
#3F7BEE
oklch(60.5% 0.185 261.8)
-
Step 600
600
#2969E6
oklch(55.5% 0.201 261.9)
-
Step 700
700
#1C57C8
oklch(49.1% 0.186 261.7)
-
Step 800
800
#1948A2
oklch(42.8% 0.155 261.7)
-
Step 900
900
#1B3D80
oklch(37.6% 0.12 262.1)
-
Step 950
950
#10254B
oklch(27.1% 0.076 261.2)
#3F7BEE 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) | #3988F2 | 0.033 |
| Deuteranopia (no green cones) | #0078EC | 0.031 |
| Tritanopia (no blue cones) | #0096A9 | 0.145 |
| Achromatopsia (no color) | #7F7F7F | 0.185 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3F7BEE
#3F7BEE
oklch(60.5% 0.185 261.8)
- #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 #3F7BEE, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Clear Blue #247AFD ΔE 0.028
- Royal Blue #4169E1 ΔE 0.047
- Cornflower #6A79F7 ΔE 0.048
- Cerulean Blue #056EEE ΔE 0.048
- Soft Blue #6488EA ΔE 0.055
- Dark Sky Blue #448EE4 ΔE 0.055
- Dodger Blue #1E90FF ΔE 0.055
- Neon Blue #4361EE ΔE 0.062
Use #3F7BEE 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.