#3F82CF
Closest named color: Water Blue (#0E87CC). oklch(60% 0.136 253.7), rgb(63, 130, 207).
Aa
Black text reads best on this color (5.30:1).
About this color
#3F82CF is a medium-dark, moderately saturated blue. In OKLCH its lightness is 60%, its chroma 0.136 and its hue 254°. Its hue sits on the cool side of the wheel. The nearest named color is Water Blue (#0E87CC), ΔE 0.027 away. Black text reads best on it, at 5.30:1.
| Hue family | Blues |
| Lightness | medium-dark (60%) |
| Chroma | moderately saturated (0.136) |
| Temperature | cool |
| Nearest name | Water Blue (#0E87CC) |
| Black text | 5.30:1 |
| White text | 3.95:1 |
Values
| HEX | #3F82CF |
| RGB | rgb(63, 130, 207) |
| HSL | hsl(212, 60%, 53%) |
| OKLCH | oklch(60% 0.136 253.7) |
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 #3F82CF | 3.95:1 | AA large text | Lc -72.2 | Content text, not long reading |
| Black text on #3F82CF | 5.30:1 | AA | Lc 37.4 | Non-text elements, placeholder text |
| #3F82CF text on white | 3.95:1 | AA large text | Lc 66.6 | Content text, not long reading |
| #3F82CF text on black | 5.30:1 | AA | Lc -35.0 | 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
#F1F6FB
oklch(97.1% 0.009 247.9)
-
Step 100
100
#E1EBF7
oklch(93.6% 0.019 252.9)
-
Step 200
200
#C9DBF2
oklch(88.5% 0.037 254.6)
-
Step 300
300
#A3C4EB
oklch(81% 0.066 252.8)
-
Step 400
400
#70A4E2
oklch(70.7% 0.107 253.5)
-
Step 500
500 (this color)
#3F82CF
oklch(60% 0.136 253.7)
-
Step 600
600
#2874C7
oklch(55.6% 0.148 253.7)
-
Step 700
700
#1A61AC
oklch(49.1% 0.138 253.7)
-
Step 800
800
#184F8B
oklch(42.6% 0.114 253.8)
-
Step 900
900
#1B426F
oklch(37.6% 0.089 253.9)
-
Step 950
950
#112741
oklch(26.9% 0.056 253.9)
#3F82CF 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) | #5F87D2 | 0.036 |
| Deuteranopia (no green cones) | #4A7ACD | 0.022 |
| Tritanopia (no blue cones) | #00949E | 0.107 |
| Achromatopsia (no color) | #808080 | 0.136 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3F82CF
#3F82CF
oklch(60% 0.136 253.7)
- #AD7200
#AD7200
oklch(59.9% 0.127 73.3)
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 #3F82CF, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Water Blue #0E87CC ΔE 0.027
- Windows Blue #3778BF ΔE 0.036
- Cool Blue #4984B8 ΔE 0.038
- Steel Blue #4682B4 ΔE 0.042
- Dark Sky Blue #448EE4 ΔE 0.043
- Off Blue #5684AE ΔE 0.056
- Soft Blue #6488EA ΔE 0.059
- Nice Blue #107AB0 ΔE 0.060
Use #3F82CF 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.