#3F82EF
Closest named color: Clear Blue (#247AFD). oklch(62% 0.178 259.7), rgb(63, 130, 239).
Aa
Black text reads best on this color (5.65:1).
About this color
#3F82EF is a medium-dark, vivid blue. In OKLCH its lightness is 62%, its chroma 0.178 and its hue 260°. Its hue sits on the cool side of the wheel. The nearest named color is Clear Blue (#247AFD), ΔE 0.036 away. Black text reads best on it, at 5.65:1.
| Hue family | Blues |
| Lightness | medium-dark (62%) |
| Chroma | vivid (0.178) |
| Temperature | cool |
| Nearest name | Clear Blue (#247AFD) |
| Black text | 5.65:1 |
| White text | 3.71:1 |
Values
| HEX | #3F82EF |
| RGB | rgb(63, 130, 239) |
| HSL | hsl(217, 85%, 59%) |
| OKLCH | oklch(62% 0.178 259.7) |
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 #3F82EF | 3.71:1 | AA large text | Lc -69.8 | Content text, not long reading |
| Black text on #3F82EF | 5.65:1 | AA | Lc 39.8 | Non-text elements, placeholder text |
| #3F82EF text on white | 3.71:1 | AA large text | Lc 64.3 | Content text, not long reading |
| #3F82EF text on black | 5.65:1 | AA | Lc -37.4 | 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
#E0EBFB
oklch(93.7% 0.025 257.6)
-
Step 200
200
#C7DAFA
oklch(88.4% 0.049 260.9)
-
Step 300
300
#A0C2F9
oklch(80.9% 0.087 259.9)
-
Step 400
400
#6BA0F7
oklch(70.7% 0.14 259.9)
-
Step 500
500 (this color)
#3F82EF
oklch(62% 0.178 259.7)
-
Step 600
600
#216CE2
oklch(55.6% 0.194 259.7)
-
Step 700
700
#1459C4
oklch(49% 0.18 259.8)
-
Step 800
800
#144A9E
oklch(42.7% 0.148 259.6)
-
Step 900
900
#183F7E
oklch(37.8% 0.116 259.7)
-
Step 950
950
#0F254A
oklch(27% 0.074 260.2)
#3F82EF 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) | #488DF3 | 0.031 |
| Deuteranopia (no green cones) | #1F7DED | 0.026 |
| Tritanopia (no blue cones) | #009CAD | 0.140 |
| Achromatopsia (no color) | #848484 | 0.178 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3F82EF
#3F82EF
oklch(62% 0.178 259.7)
- #AE7C00
#AE7C00
oklch(62% 0.128 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 #3F82EF, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Clear Blue #247AFD ΔE 0.036
- Dark Sky Blue #448EE4 ΔE 0.039
- Dodger Blue #1E90FF ΔE 0.040
- Soft Blue #6488EA ΔE 0.042
- Cornflower #6A79F7 ΔE 0.049
- Chefchaouen Blue #4895EF ΔE 0.052
- Water Blue #0E87CC ΔE 0.063
- Cerulean Blue #056EEE ΔE 0.063
Use #3F82EF 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.