#3F87FF
Closest named color: Dodger Blue (#1E90FF). oklch(64.1% 0.193 260.1), rgb(63, 135, 255).
Aa
Black text reads best on this color (6.12:1).
About this color
#3F87FF is a medium-light, vivid blue. In OKLCH its lightness is 64%, its chroma 0.193 and its hue 260°. Its hue sits on the cool side of the wheel. The nearest named color is Dodger Blue (#1E90FF), ΔE 0.026 away. Black text reads best on it, at 6.12:1.
| Hue family | Blues |
| Lightness | medium-light (64%) |
| Chroma | vivid (0.193) |
| Temperature | cool |
| Nearest name | Dodger Blue (#1E90FF) |
| Black text | 6.12:1 |
| White text | 3.43:1 |
Values
| HEX | #3F87FF |
| RGB | rgb(63, 135, 255) |
| HSL | hsl(218, 100%, 62%) |
| OKLCH | oklch(64.1% 0.193 260.1) |
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 #3F87FF | 3.43:1 | AA large text | Lc -66.8 | Content text, not long reading |
| Black text on #3F87FF | 6.12:1 | AA | Lc 42.7 | Non-text elements, placeholder text |
| #3F87FF text on white | 3.43:1 | AA large text | Lc 61.4 | Content text, not long reading |
| #3F87FF text on black | 6.12:1 | AA | Lc -40.3 | 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
#DFEBFD
oklch(93.6% 0.028 258.4)
-
Step 200
200
#C5DAFD
oklch(88.4% 0.054 260.6)
-
Step 300
300
#9DC2FE
oklch(80.9% 0.094 259.9)
-
Step 400
400
#679FFE
oklch(70.6% 0.152 260.4)
-
Step 500
500 (this color)
#3F87FF
oklch(64.1% 0.193 260.1)
-
Step 600
600
#176AEB
oklch(55.7% 0.209 260)
-
Step 700
700
#0757CC
oklch(49.1% 0.194 260)
-
Step 800
800
#0C48A5
oklch(42.7% 0.161 260)
-
Step 900
900
#133E83
oklch(37.8% 0.126 259.8)
-
Step 950
950
#0D254D
oklch(27.1% 0.08 260.1)
#3F87FF 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) | #4494FF | 0.035 |
| Deuteranopia (no green cones) | #0082FD | 0.031 |
| Tritanopia (no blue cones) | #00A4B7 | 0.151 |
| Achromatopsia (no color) | #8A8A8A | 0.193 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3F87FF
#3F87FF
oklch(64.1% 0.193 260.1)
- #B68200
#B68200
oklch(64.2% 0.133 80.3)
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 #3F87FF, closest first.
No curated palette has a color within ΔE 0.04 of #3F87FF.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dodger Blue #1E90FF ΔE 0.026
- Clear Blue #247AFD ΔE 0.040
- Soft Blue #6488EA ΔE 0.046
- Dark Sky Blue #448EE4 ΔE 0.047
- Chefchaouen Blue #4895EF ΔE 0.048
- Cornflower #6A79F7 ΔE 0.050
- Cornflower Blue #6495ED ΔE 0.062
- Cerulean Blue #056EEE ΔE 0.078
Use #3F87FF 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.