#3F7BFD
Closest named color: Clear Blue (#247AFD). oklch(61.5% 0.204 263.1), rgb(63, 123, 253).
Aa
Black text reads best on this color (5.46:1).
About this color
#3F7BFD is a medium-dark, vivid blue. In OKLCH its lightness is 62%, its chroma 0.204 and its hue 263°. Its hue sits on the cool side of the wheel. The nearest named color is Clear Blue (#247AFD), ΔE 0.018 away. Black text reads best on it, at 5.46:1.
| Hue family | Blues |
| Lightness | medium-dark (62%) |
| Chroma | vivid (0.204) |
| Temperature | cool |
| Nearest name | Clear Blue (#247AFD) |
| Black text | 5.46:1 |
| White text | 3.84:1 |
Values
| HEX | #3F7BFD |
| RGB | rgb(63, 123, 253) |
| HSL | hsl(221, 98%, 62%) |
| OKLCH | oklch(61.5% 0.204 263.1) |
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 #3F7BFD | 3.84:1 | AA large text | Lc -70.9 | Content text, not long reading |
| Black text on #3F7BFD | 5.46:1 | AA | Lc 38.7 | Non-text elements, placeholder text |
| #3F7BFD text on white | 3.84:1 | AA large text | Lc 65.4 | Content text, not long reading |
| #3F7BFD text on black | 5.46:1 | AA | Lc -36.2 | 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
#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
#A0C1FF
oklch(80.9% 0.095 262.7)
-
Step 400
400
#6D9EFF
oklch(70.8% 0.152 262.8)
-
Step 500
500 (this color)
#3F7BFD
oklch(61.5% 0.204 263.1)
-
Step 600
600
#2665F2
oklch(55.6% 0.221 263)
-
Step 700
700
#1A52D3
oklch(49% 0.207 263.2)
-
Step 800
800
#1744AA
oklch(42.6% 0.171 263.1)
-
Step 900
900
#193B87
oklch(37.7% 0.134 263.3)
-
Step 950
950
#0F234F
oklch(26.9% 0.085 263.4)
#3F7BFD 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) | #208BFF | 0.040 |
| Deuteranopia (no green cones) | #007AFA | 0.029 |
| Tritanopia (no blue cones) | #009AB0 | 0.160 |
| Achromatopsia (no color) | #828282 | 0.204 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3F7BFD
#3F7BFD
oklch(61.5% 0.204 263.1)
- #A97C00
#A97C00
oklch(61.4% 0.126 83)
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 #3F7BFD, closest first.
No curated palette has a color within ΔE 0.04 of #3F7BFD.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Clear Blue #247AFD ΔE 0.018
- Cornflower #6A79F7 ΔE 0.045
- Dodger Blue #1E90FF ΔE 0.052
- Cerulean Blue #056EEE ΔE 0.053
- Royal Blue #4169E1 ΔE 0.059
- Soft Blue #6488EA ΔE 0.061
- Neon Blue #4361EE ΔE 0.064
- Bright Blue #0165FC ΔE 0.066
Use #3F7BFD 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.