#3F87C2
Closest named color: Cool Blue (#4984B8). oklch(60.4% 0.115 246.1), rgb(63, 135, 194).
Aa
Black text reads best on this color (5.45:1).
About this color
#3F87C2 is a medium-dark, moderately saturated blue. In OKLCH its lightness is 60%, its chroma 0.115 and its hue 246°. Its hue sits on the cool side of the wheel. The nearest named color is Cool Blue (#4984B8), ΔE 0.016 away. Black text reads best on it, at 5.45:1.
| Hue family | Blues |
| Lightness | medium-dark (60%) |
| Chroma | moderately saturated (0.115) |
| Temperature | cool |
| Nearest name | Cool Blue (#4984B8) |
| Black text | 5.45:1 |
| White text | 3.84:1 |
Values
| HEX | #3F87C2 |
| RGB | rgb(63, 135, 194) |
| HSL | hsl(207, 52%, 50%) |
| OKLCH | oklch(60.4% 0.115 246.1) |
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 #3F87C2 | 3.84:1 | AA large text | Lc -71.2 | Content text, not long reading |
| Black text on #3F87C2 | 5.45:1 | AA | Lc 38.4 | Non-text elements, placeholder text |
| #3F87C2 text on white | 3.84:1 | AA large text | Lc 65.7 | Content text, not long reading |
| #3F87C2 text on black | 5.45:1 | 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
#F1F6FA
oklch(97.1% 0.008 241.7)
-
Step 100
100
#E1EBF4
oklch(93.5% 0.016 245.1)
-
Step 200
200
#C9DCED
oklch(88.6% 0.031 245.1)
-
Step 300
300
#A3C5E4
oklch(80.9% 0.057 246.1)
-
Step 400
400
#70A6D6
oklch(70.6% 0.091 246.3)
-
Step 500
500 (this color)
#3F87C2
oklch(60.4% 0.115 246.1)
-
Step 600
600
#2578B8
oklch(55.5% 0.126 246.5)
-
Step 700
700
#16659E
oklch(49.1% 0.116 246.1)
-
Step 800
800
#165380
oklch(42.8% 0.096 245.6)
-
Step 900
900
#1A4567
oklch(37.8% 0.075 245.6)
-
Step 950
950
#11283C
oklch(26.9% 0.047 246.9)
#3F87C2 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) | #6D89C5 | 0.049 |
| Deuteranopia (no green cones) | #5B7CC1 | 0.037 |
| Tritanopia (no blue cones) | #00959C | 0.085 |
| Achromatopsia (no color) | #828282 | 0.115 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3F87C2
#3F87C2
oklch(60.4% 0.115 246.1)
- #AF722A
#AF722A
oklch(60.4% 0.115 66.4)
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 #3F87C2, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cool Blue #4984B8 ΔE 0.016
- Steel Blue #4682B4 ΔE 0.023
- Water Blue #0E87CC ΔE 0.027
- Off Blue #5684AE ΔE 0.034
- Blue NCS #118AB2 ΔE 0.038
- Dusty Blue #5A86AD ΔE 0.038
- Faded Blue #658CBB ΔE 0.043
- Windows Blue #3778BF ΔE 0.044
Use #3F87C2 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.