#3F87FB
Closest named color: Dodger Blue (#1E90FF). oklch(63.8% 0.188 259.6), rgb(63, 135, 251).
Aa
Black text reads best on this color (6.06:1).
About this color
#3F87FB is a medium-light, vivid blue. In OKLCH its lightness is 64%, its chroma 0.188 and its hue 260°. Its hue sits on the cool side of the wheel. The nearest named color is Dodger Blue (#1E90FF), ΔE 0.025 away. Black text reads best on it, at 6.06:1.
| Hue family | Blues |
| Lightness | medium-light (64%) |
| Chroma | vivid (0.188) |
| Temperature | cool |
| Nearest name | Dodger Blue (#1E90FF) |
| Black text | 6.06:1 |
| White text | 3.45:1 |
Values
| HEX | #3F87FB |
| RGB | rgb(63, 135, 251) |
| HSL | hsl(217, 96%, 62%) |
| OKLCH | oklch(63.8% 0.188 259.6) |
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 #3F87FB | 3.45:1 | AA large text | Lc -67.2 | Content text, not long reading |
| Black text on #3F87FB | 6.06:1 | AA | Lc 42.4 | Non-text elements, placeholder text |
| #3F87FB text on white | 3.45:1 | AA large text | Lc 61.7 | Content text, not long reading |
| #3F87FB text on black | 6.06:1 | AA | Lc -40.0 | 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
#E0EBFC
oklch(93.7% 0.026 259)
-
Step 200
200
#C6DAFC
oklch(88.4% 0.052 261.1)
-
Step 300
300
#9EC2FC
oklch(80.9% 0.091 259.8)
-
Step 400
400
#68A0FB
oklch(70.7% 0.146 259.7)
-
Step 500
500 (this color)
#3F87FB
oklch(63.8% 0.188 259.6)
-
Step 600
600
#186BE8
oklch(55.7% 0.204 259.6)
-
Step 700
700
#0858C9
oklch(49.1% 0.189 259.6)
-
Step 800
800
#0D49A3
oklch(42.8% 0.157 259.6)
-
Step 900
900
#143E81
oklch(37.7% 0.122 259.7)
-
Step 950
950
#0D254C
oklch(27% 0.078 259.7)
#3F87FB 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) | #4893FF | 0.033 |
| Deuteranopia (no green cones) | #1482F9 | 0.028 |
| Tritanopia (no blue cones) | #00A3B5 | 0.147 |
| Achromatopsia (no color) | #8A8A8A | 0.188 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3F87FB
#3F87FB
oklch(63.8% 0.188 259.6)
- #B58100
#B58100
oklch(63.8% 0.132 80.2)
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 #3F87FB, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dodger Blue #1E90FF ΔE 0.025
- Clear Blue #247AFD ΔE 0.040
- Dark Sky Blue #448EE4 ΔE 0.042
- Soft Blue #6488EA ΔE 0.042
- Chefchaouen Blue #4895EF ΔE 0.045
- Cornflower #6A79F7 ΔE 0.050
- Cornflower Blue #6495ED ΔE 0.059
- Cerulean Blue #056EEE ΔE 0.076
Use #3F87FB 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.