#3687F4
Closest named color: Dodger Blue (#1E90FF). oklch(63.1% 0.181 257.1), rgb(54, 135, 244).
Aa
Black text reads best on this color (5.92:1).
About this color
#3687F4 is a medium-light, vivid blue. In OKLCH its lightness is 63%, its chroma 0.181 and its hue 257°. 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 5.92:1.
| Hue family | Blues |
| Lightness | medium-light (63%) |
| Chroma | vivid (0.181) |
| Temperature | cool |
| Nearest name | Dodger Blue (#1E90FF) |
| Black text | 5.92:1 |
| White text | 3.54:1 |
Values
| HEX | #3687F4 |
| RGB | rgb(54, 135, 244) |
| HSL | hsl(214, 90%, 58%) |
| OKLCH | oklch(63.1% 0.181 257.1) |
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 #3687F4 | 3.54:1 | AA large text | Lc -68.0 | Content text, not long reading |
| Black text on #3687F4 | 5.92:1 | AA | Lc 41.5 | Non-text elements, placeholder text |
| #3687F4 text on white | 3.54:1 | AA large text | Lc 62.5 | Content text, not long reading |
| #3687F4 text on black | 5.92:1 | AA | Lc -39.2 | 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
#F0F6FE
oklch(97.1% 0.012 255.5)
-
Step 100
100
#DFEBFB
oklch(93.6% 0.025 255.6)
-
Step 200
200
#C5DBFA
oklch(88.5% 0.049 256.9)
-
Step 300
300
#9CC3FA
oklch(80.9% 0.089 257)
-
Step 400
400
#64A2F7
oklch(70.8% 0.141 256.6)
-
Step 500
500 (this color)
#3687F4
oklch(63.1% 0.181 257.1)
-
Step 600
600
#036EE3
oklch(55.7% 0.197 257.1)
-
Step 700
700
#005CC1
oklch(49.2% 0.175 257.1)
-
Step 800
800
#014B9F
oklch(42.7% 0.151 257)
-
Step 900
900
#0F407F
oklch(37.8% 0.118 257)
-
Step 950
950
#0B264A
oklch(27.1% 0.074 256.8)
#3687F4 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) | #4E91F8 | 0.035 |
| Deuteranopia (no green cones) | #2280F2 | 0.023 |
| Tritanopia (no blue cones) | #00A1B2 | 0.138 |
| Achromatopsia (no color) | #888888 | 0.181 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3687F4
#3687F4
oklch(63.1% 0.181 257.1)
- #B57D00
#B57D00
oklch(63.1% 0.132 77.3)
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 #3687F4, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dodger Blue #1E90FF ΔE 0.026
- Dark Sky Blue #448EE4 ΔE 0.035
- Clear Blue #247AFD ΔE 0.040
- Chefchaouen Blue #4895EF ΔE 0.043
- Soft Blue #6488EA ΔE 0.043
- Cornflower #6A79F7 ΔE 0.056
- Cornflower Blue #6495ED ΔE 0.060
- Water Blue #0E87CC ΔE 0.065
Use #3687F4 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.