#3F82CA
Closest named color: Water Blue (#0E87CC). oklch(59.7% 0.13 252.3), rgb(63, 130, 202).
Aa
Black text reads best on this color (5.25:1).
About this color
#3F82CA is a medium-dark, moderately saturated blue. In OKLCH its lightness is 60%, its chroma 0.130 and its hue 252°. Its hue sits on the cool side of the wheel. The nearest named color is Water Blue (#0E87CC), ΔE 0.025 away. Black text reads best on it, at 5.25:1.
| Hue family | Blues |
| Lightness | medium-dark (60%) |
| Chroma | moderately saturated (0.130) |
| Temperature | cool |
| Nearest name | Water Blue (#0E87CC) |
| Black text | 5.25:1 |
| White text | 3.99:1 |
Values
| HEX | #3F82CA |
| RGB | rgb(63, 130, 202) |
| HSL | hsl(211, 57%, 52%) |
| OKLCH | oklch(59.7% 0.13 252.3) |
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 #3F82CA | 3.99:1 | AA large text | Lc -72.5 | Content text, not long reading |
| Black text on #3F82CA | 5.25:1 | AA | Lc 37.1 | Non-text elements, placeholder text |
| #3F82CA text on white | 3.99:1 | AA large text | Lc 67.0 | Content text, not long reading |
| #3F82CA text on black | 5.25:1 | AA | Lc -34.7 | 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
#E1EBF6
oklch(93.6% 0.018 250.6)
-
Step 200
200
#C9DBF0
oklch(88.4% 0.035 252.3)
-
Step 300
300
#A4C4E9
oklch(80.9% 0.063 252.3)
-
Step 400
400
#71A4DE
oklch(70.6% 0.101 252.4)
-
Step 500
500 (this color)
#3F82CA
oklch(59.7% 0.13 252.3)
-
Step 600
600
#2975C3
oklch(55.6% 0.142 252.4)
-
Step 700
700
#1B62A8
oklch(49.1% 0.131 252.3)
-
Step 800
800
#195088
oklch(42.6% 0.109 252.3)
-
Step 900
900
#1C436D
oklch(37.7% 0.085 252.5)
-
Step 950
950
#112740
oklch(26.9% 0.055 253.1)
#3F82CA 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) | #6286CD | 0.038 |
| Deuteranopia (no green cones) | #4E79C9 | 0.026 |
| Tritanopia (no blue cones) | #00939C | 0.101 |
| Achromatopsia (no color) | #7F7F7F | 0.130 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3F82CA
#3F82CA
oklch(59.7% 0.13 252.3)
- #AD7100
#AD7100
oklch(59.8% 0.128 72.6)
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 #3F82CA, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Water Blue #0E87CC ΔE 0.025
- Cool Blue #4984B8 ΔE 0.031
- Windows Blue #3778BF ΔE 0.032
- Steel Blue #4682B4 ΔE 0.034
- Dark Sky Blue #448EE4 ΔE 0.048
- Off Blue #5684AE ΔE 0.049
- Blue NCS #118AB2 ΔE 0.054
- Dusty Blue #5A86AD ΔE 0.054
Use #3F82CA 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.