#3F7AFE
Closest named color: Clear Blue (#247AFD). oklch(61.4% 0.206 263.4), rgb(63, 122, 254).
Aa
Black text reads best on this color (5.42:1).
About this color
#3F7AFE is a medium-dark, vivid blue. In OKLCH its lightness is 61%, its chroma 0.206 and its hue 263°. Its hue sits on the cool side of the wheel. The nearest named color is Clear Blue (#247AFD), ΔE 0.017 away. Black text reads best on it, at 5.42:1.
| Hue family | Blues |
| Lightness | medium-dark (61%) |
| Chroma | vivid (0.206) |
| Temperature | cool |
| Nearest name | Clear Blue (#247AFD) |
| Black text | 5.42:1 |
| White text | 3.87:1 |
Values
| HEX | #3F7AFE |
| RGB | rgb(63, 122, 254) |
| HSL | hsl(221, 99%, 62%) |
| OKLCH | oklch(61.4% 0.206 263.4) |
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 #3F7AFE | 3.87:1 | AA large text | Lc -71.1 | Content text, not long reading |
| Black text on #3F7AFE | 5.42:1 | AA | Lc 38.4 | Non-text elements, placeholder text |
| #3F7AFE text on white | 3.87:1 | AA large text | Lc 65.6 | Content text, not long reading |
| #3F7AFE text on black | 5.42:1 | AA | Lc -36.0 | 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
#F1F6FF
oklch(97.2% 0.013 262.4)
-
Step 100
100
#E0EAFE
oklch(93.6% 0.029 264.4)
-
Step 200
200
#C6DAFF
oklch(88.5% 0.056 262.8)
-
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)
#3F7AFE
oklch(61.4% 0.206 263.4)
-
Step 600
600
#2764F4
oklch(55.6% 0.225 263.4)
-
Step 700
700
#1B52D4
oklch(49.1% 0.208 263.3)
-
Step 800
800
#1844AB
oklch(42.7% 0.172 263.4)
-
Step 900
900
#193B88
oklch(37.7% 0.135 263.4)
-
Step 950
950
#0F234F
oklch(26.9% 0.085 263.4)
#3F7AFE 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) | #188BFF | 0.043 |
| Deuteranopia (no green cones) | #0079FB | 0.029 |
| Tritanopia (no blue cones) | #009AB0 | 0.163 |
| Achromatopsia (no color) | #818181 | 0.207 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3F7AFE
#3F7AFE
oklch(61.4% 0.206 263.4)
- #A87C00
#A87C00
oklch(61.3% 0.126 83.6)
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 #3F7AFE, closest first.
No curated palette has a color within ΔE 0.04 of #3F7AFE.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Clear Blue #247AFD ΔE 0.017
- Cornflower #6A79F7 ΔE 0.045
- Cerulean Blue #056EEE ΔE 0.052
- Dodger Blue #1E90FF ΔE 0.054
- Royal Blue #4169E1 ΔE 0.058
- Neon Blue #4361EE ΔE 0.062
- Soft Blue #6488EA ΔE 0.064
- Bright Blue #0165FC ΔE 0.064
Use #3F7AFE 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.